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The current study was carried out on the basis of the Institute of Seed Production and Agrotechnologies, located in the Ryazan Region in 2010–2019, in order to determine the participation share of tillering shoots in the formation of spring wheat productivity in various agro-weather conditions. The objects of the study were the varieties ‘Lada’, ‘Agata’, ‘RIMA’, ‘Maestro’ developed by the Federal Research Agro-Engineering Center VIM. The mean productivity of the studied spring wheat varieties, depending on the level of moisture supply of the growing seasons, had a significant range of 2.20–5.29 t/ha. The mean density of the stems varied from 216 to 620 pcs/m2 among the varieties. The minimum value of 153–253 pcs/m2 was formed under severe drought conditions. When moisture supply improved, the indicator sharply increased in 2.6 times. There has been established that in more humid conditions (HThC 0.98–1.55) the plants were able to realize their potential tillering to a greater extent, the general indicators of tillering among the varieties ranged from 1.06 to 1.23 and 1.63 to 2.11. There was estimated an effect of secondary shoots on productivity, which was 35.2% on average in the trial, and from 10.6% to 48.3% depending on the genotype and environmental conditions. There has been found a shoot formation decrease in 2.4 times of the variety ‘Lada’ under a moisture deficit. There has been determined that the variety ‘RIMA’ had the lowest tillering coefficient for all vegetation periods, and grain weight per a main spike mainly contributed to its productivity. During the moisture deficit periods, the share of the effect of lateral shoots in the variety ‘Agata’ was at the level of mean values, and on 9.9% and 13.1% more than in the varieties ‘Lada’ and ‘RIMA’, respectively. The maximum value of the productivity on the lateral shoots was formed by the variety ‘Maestro’, the productivity share of the secondary shoots during all periods was higher than that of all varieties and amounted to 39.1–48.3%.

Echinochloa crus-galli (L.) Beauv. is a stronger competitor of rice for resources than other weeds. An adequate knowledge of the biology, ecology and critical period of competition of E. crus-galli...

The present study was undertaken to analyze diallel data using GGE biplot model to gather information about genetic interrelationships among parents and identification of heterotic combinations for yield and yield components in bread wheat varieties. For this purpose, 8 bread wheat genotypes tested across in half-diallel crosses design, GGE biplot technique was used. Parents included the genotypes of Kouhdasht, Karim, Ehsan, Mehregan, N-92-9, Line 17, N80-19 and Atrak. The hybrids obtained from the one-way cross (28 hybrids) in agricultural years of 2016-17 were evaluated as randomized complete block design in two replications on the research farm of Gonbad Kavous University. The evaluated traits included the grain yield, weight of spike grains, number of grains in spike and number of spikes. Additive main effects and genotype × environment interaction (GGE) were employed in the evaluation of genotypes; analyses showed significant (P< 0.01) G × E, (genotype × environment interaction) with respect to plant seed yield. GGE biplot analysis showed that Karim was as the best general combiners for grain yield, number grain per spike and grain weight per spike, whereas Ehsan had the highest GCA effects for number of spikes. Ehsan and Karim had higher specific combining ability than other genotypes. The studied genotypes for this trait were divided into two heterotic groups where the first group included the genotypes of Kouhdasht, N-92-9, N80-19 and Atrak and the second group contained the genotypes of Line 17, Mehregan and Karim. Mehregan line had a weak combining ability with all testers and N-92-9 had also more power than others. Based on the biplot, the Karim genotype with high general adaptation was introduced as the ideal genotype in terms of grain yield, spike number, grain number per spike and grain weight, so the Karim genotype can be adapted to obtain high yield hybrids.

The present study aimed to estimate genetic parameters of 20 common bean genotypes, commercial and regional bean on weed interference. The agronomic characters analyzed were: average stem diameter (ASD); average plant length (APL); number of pods per pot (NPP); number of locules per pod (NLP); number of grains per pod (NGP); percentage of empty locules (% EL); total grains per pot (TGP); total grain weight per pot (TGW) and average grain weight (AGW). High heritability values were found for most of the characters studied, except for NGP and EL; in addition to great genetic variability among genotypes. Therefore, for most of the characteristics of agronomic interest studied, simple selection methods can be applied with great potential to identify superior genotypes and consequent genetic progress in common bean breeding.

Emmer wheat (Triticum turgidum ssp. dicoccum) is one of the most promising gene sources for drought tolerance improvement of durum wheat (Triticum turgidum ssp. durum). Achieving desired results requires a conscious choice of crossing parents based on general and specific combining ability (GCA and SCA) and also understanding the genes action involved in controlling the desired traits. In this study a 12 × 12 full diallel cross was performed using four emmer and eight durum wheats. The 132 hybrid progenies along with their parental lines were field evaluated under water-stressed and non-stressed conditions. Based on the Griffing diallel analysis both GCA and SCA effects were highly significant for all measured traits under both water treatments indicating possibility of improvement for drought tolerance. In this respect, the amount of additive effect was higher than the non-additive suggesting the chance for genetic advancement through selection. Based on Hayman's graphical analyses under the two water conditions it was revealed that several grain yield component traits were under the control of partial dominance. In contrary, grain yield and most morphological traits showed either dominance or over-dominance gene action. Grain yield had a significant positive correlation with the number of kernels per spike, kernel diameter, grain weight per spike and harvest index. These traits also had greater share of additive effects, relatively high narrow-sense heritability and high Baker ratio suggesting effective indirect selection for grain yield. Most durum × emmer hybrids had grain yield and drought tolerance indices better than the parents indicating that Iranian emmer wheats have a great genetic potential for drought tolerance improvement of durum wheat.

A study was conducted during the period of three concessive years from 2016/2017 to 2018/2019 in the experimental field of the Institute of Agriculture - Karnobat, Southeastern Bulgaria with the aim to investigate the variability, heritability, and correlation between grain yield and yield-related traits of breeding lines of facultative barley under rainfed conditions and to select lines with desirable agronomic traits for including in further breeding work for the development of facultative barley varieties for Bulgarian environments. The traits: number of days to heading, plant height, spike length, spikelet number per spike, grain number per spike, grain weight per spike, and grain yield were recorded. The analysis of variance indicated significant differences between 6-rowed facultative barley genotypes in the studied traits. Most of the traits under the study showed the relatively low phenotypic and genotypic coefficient of variation. The estimates for heritability in broad-sense were high for the number of days to heading, grain weight per spike, and 1000-grain weight and very high for plant height and spike length suggesting a possibility for improvement of those traits through selection based on phenotype. Whereas low heritability of grain yield was found indicating that the phenotypic selection could be ineffective under these specific conditions. Grain yield of facultative barley accessions showed a significant positive correlation with spike length, spikelet number per spike, grain number per spike and grain weight per spike. The traits with the highest positive direct effect on grain yield were grain number per spike and 1000-grain weight while days to heading had a highly negative direct effect on grain yield. A combination of high heritability and high direct on grain yield in 1000-grain weight and days to heading shows that those traits may be used in early-generation selection in breeding of high-yielding facultative lines. The accession TX01D236 had a significantly higher grain yield compared to check varieties and could be included in future breeding work.

Rice grain yield is determined by three major “visible” morphological traits: grain weight, grain number per panicle, and effective tiller number, which are affected by a series of “invisible” physiological factors including nutrient use efficiency and photosynthetic efficiency. In the past few decades, substantial progress has been made on elucidating the molecular mechanisms underlying grain yield formation, laying a solid foundation for improving rice yield by molecular breeding. This review outlines our current understanding of the three morphological yield-determining components and summarizes major progress in decoding physiological traits such as nutrient use efficiency and photosynthetic efficiency. It also discusses the integration of current knowledge about yield formation and crop improvement strategies including genome editing with conventional and molecular breeding.

The use of large quantities of mineral fertilizers causes many environmental problems. The aim of this study was to study the effect of minerals, organic and bio-fertilizers on yield and it’s components of three synthetic varieties of maize and the possibility of replacing part of the mineral fertilizers with organic or bio-fertilizers. The layout of the experiment was Randomized Complete Blocks Design in split plots arrangement with three replicates. The experiment included three synthetic varieties of maize in the main plots and five fertilizer treatments in the sub plots. The results showed that maize varieties had non-significant difference in all studied characters except the number of rows per ear; Baghdad-3 gave the highest mean of the number of rows per ear (14.98 row ear-1). Also, the results indicated that there were significant differences among fertilizer treatments in all studied characters, the application of 50% mineral fertilizer + spraying seaweed extract at 10% had the highest means of number of ears per plant (1.43 ear plant-1), number of rows per ear (15.08 row ear-1), number of grains per row (39.34 grain row-1) which led to highest grain yield (9077 Kg ha-1), while the application of mineral fertilizer as recommended gave the highest mean of 500 grain weight (111.78 g).

The article presents a new variety of soft winter wheat Verochka, created in the North Caucasian Federal Research Center. On average, over the years of study (2018-2020), the excess in grain yield over the standard was high and reliable and amounted to 1.21 t / ha. The new genotype is distinguished by an increased formation of productive stems per 1 m2, a high grain weight of an ear and a weight of 1000 grains. Reliably and significantly exceeds the standard variety Thunder in frost resistance and disease resistance. Verochka is characterized by high quality grain and bread, high drought resistance and lodging resistance. The new variety is well recommended for growing on all fertilized predecessors using intensive and medium-intensity technologies on farms of all forms of ownership.

Meta-QTL (MQTL) analysis is a robust approach for genetic dissection of complex quantitative traits. Rice varieties adapted to non-flooded cultivation are highly desirable in breeding programs due to the water deficit global problem. In order to identify stable QTLs for major agronomic traits under water deficit conditions, we performed a comprehensive MQTL analysis on 563 QTLs from 67 rice populations published from 2001 to 2019. Yield and yield-related traits including grain weight, heading date, plant height, tiller number as well as root architecture-related traits including root dry weight, root length, root number, root thickness, the ratio of deep rooting and plant water content under water deficit condition were investigated. A total of 61 stable MQTLs over different genetic backgrounds and environments were identified. The average confidence interval of MQTLs was considerably refined compared to the initial QTLs, resulted in the identification of some well-known functionally characterized genes and several putative novel CGs for investigated traits. Ortho-MQTL mining based on genomic collinearity between rice and maize allowed identification of five ortho-MQTLs between these two cereals. The results can help breeders to improve yield under water deficit conditions.

The aim of this study was to assess the variation in grain quality traits among mutant lines of winter feed barley. Nine mutant lines derived from the advanced breeding line Kt3029 and 10 mutant lines derived from variety GA-Luttrell along with their parent forms were evaluated. The study was conducted at the Institute of Agriculture – Karnobat during the period 2015-2017. Test weight, 1000-grain weight, the content of protein, starch, lysine, fat, ash, and fibre were determined. Significant differences between the mutant lines and the parent forms for the studied traits were observed. Significantly higher protein content compared to parent was found in the grain of mutant lines 22/1-5, 22/2-10 and 22/1-12 from line Kt3029 and 26/1-1, 26/1-3 and 26/2-11 from variety GA-Luttrell. The grain of mutant line 26/2-12 had the best combination of protein and starch. Mutant lines 22/1-11 and 22/1-12 from Kt3029 and 26/1-1, 26/2-1 and 26/2-12 from variety GA-Luttrell showed a good combination between protein content and 1000-grain weight. Those mutant lines can be included in the breeding program for the development of varieties with improved feed quality.

The influence of previous crops (oat, maize, or rape) and six variety of hulled oats (Avena sativa L.) were assessed qualitatively and quantitatively as to yield, thousand grain weight, and grain size in observations from 2009 to 2012. Harvested grain samples were analysed for the presence of mycotoxins (T-2 and HT-2 toxins, deoxynivalenol, and nivalenol) using LC/MS–MS. Fusarium poae was the species most often found on oats. Flamingsprofi and Salo were the most sensitive varieties of oat. The sensitivity of the variety to lodging as well as the earliness of the variety was correlated with the occurrence of fusariosis on oats. The highest average occurrence of Fusaria on oat grains was after use of maize as the pre-crop. The oat samples were most often contaminated with nivalenol. Nivalenol positively correlated with the weight of a thousand grains of oat and negatively correlated with the oats grain falling through the sieve.

Relevance. The yield level significantly depends on the cultivation technique and landscape conditions. Therefore, knowledge of the mechanism of the relationship between these factors and the plant is relevant. Methods . The experiment was carried out in 2015–2019 at the “Agro landscape” training ground. The aim of the research was to study the influence of predecessors, the level of mineral nutrition and location in the relief on the formation of elements of the structure of the yield of winter wheat in the zone of unstable moisture in the Stavropol Territory. Results . The pea yield was formed in 2015 by the type of tall stalks, in 2017 by the mixed type, in other years by the spike type. On taxon A 1 , the yield depended on the grain weight per year in a strong ( r = 0.85), and on A 3 , in an average ( r = 0.60). For the halffallow, the formation proceeded in 2015 due to the productive stalk ( r = 0.78) and grain weight per ear ( r = 0.71), in 2016–2019. according to the spike type ( r = 0.76–0.96). In taxon A 1 , the yield was formed due to the weight of grain per ear ( r = 0.83), and in taxon A 2 and A 3 , due to the stem ( r = 0.84–0.85). For peas, a significant difference between the nutritional backgrounds was for all elements of the crop structure, except for the weight of grain per ear, and for half-fallow only in the number of productive stems. On average for predecessors, a significant difference in taxa was noted between A1 and A 2 in the number of grains and grain weight per ear, between A 2 and A 3 in the stem, between A 1 and A 3 in all elements of the crop structure. The strongest relationship between yield was noted with the weight of grain per ear ( r = 0.88), which is closely related to the weight of 1000 grains ( r = 0.83) and the number of grains per ear ( r = 0.82).

The experimental data on effect of Bloom & Grow and Immune System fertilizers on growth, development, yield and grain quality of spring durum and soft wheat in light gray forest soils of the Chuvash Republic are presented. The results of two research years revealed that in plants treated with fertilizers, the growth period ‘seedling-ripening’ is reduced by 7-8 days, height of the treated soft wheat plants exceeded the control variant by 12.5 cm, length of the main spike - by 0.4 cm, number of grains per spike - by 6.1, and grain mass per spike - by 0.23 g. Plants of spring durum wheat treated with micronutrient fertilizers exceeded the control variant by 25.1 cm in plant height, length of the main spike, number of grains in it and grain weight significantly exceeded the control variant. The 1000 seed mass exceeded the control variant by 7.28 grams. The increase in the yield of spring soft wheat was 0.89 t/ha (26.3%), and durum wheat - 0.93 t/ha (28.6%). Application of Bloom & Grow and Immune System fertilizers led to an increase in gluten content in spring soft and durum wheat grains, and an improvement in gluten deformation rate to group 1 with the accumulation of minerals.

The present experiment was carried out with fifty bread wheat genotypes to estimate correlation coefficients between grain yield and its components and to determine their direct and indirect effects on grain yield using path coefficient analysis. The analysis of variance revealed highly significant differences for all the characters studied. Grain yield per plant had significant and positive correlation with grain weight per main spike, number of grains per main spike, biological yield per plant and harvest index at both the genotypic and phenotypic levels. Days to maturity had significant and positive correlation with grain yield per plant at genotypic level only. The phenotypic and genotypic path coefficient analysis revealed that the biological yield per plant and harvest index exhibited positive and appreciable direct effects on grain yield per plant. Therefore, more emphasis should be given to both these characters for improvement of grain yield in bread wheat through selection programme.

We presented analysis of the influence of spring wheat seeds sowing qualities on the yield. Experimental studies were carried out in 2010-2017 in Altai Krai. The seed divided into fractions in the air stream differs significantly in its characteristics. The ratio of fractions significantly depends on the conditions of the year and has a significant impact on the formation of the potential yield of spring wheat. Seeds isolated at an air speed of 8 m/s are a highly significant limiting factor in achieving the maximum yield of spring wheat. An increase in their share for every 10% in the seed can lead to a yield shortfall of up to 5.5 c/ha. Sowing should be carried out with the most complete seed fractions, with a 1000 grain weight of 31.8-38.0 g, obtained at an air flow rate of 9 m/s. Their share in the seed used by the farms of the region is 34.8 - 52.7%. Key words: spring wheat, seed structure, yield, Altai Krai References Barysheva, N.N., Belyaev, V.I., Baryshev, D.D., Pronin, S.P. (2019). Experimental study of the electrophysical properties of wheat seeds, divided into fractions by aerodynamic properties. Bulletin of Altai State Agrarian University, 9 (179), 136-139 (In Russian). Beletskiy, S.L., Gusakova, L.P., Priyaikin, N.S., Arkhipov

Background. Lodging has an extremely negative impact on barley yield: grain quality and planting properties are deteriorated, disease incidence increases, and mechanized harvesting becomes difficult, so it is important to find new sources of lodging resistance in barley and use them in crosses and breeding programs to develop non-lodging barley cultivars.Materials and methods. Experimental work was carried out in 2018 and 2019 at Federal Agricultural Science Center of the North-East (FASC North-East), Kirov. Yield structure components and lodging resistance levels were assessed for 29 accessions from the spring barley collection. The study was based on the International COMECON List of Descriptors for the Genus Hordeum L. (subgen. Hordeum) and Methodological Guidelines for the Study and Preservation of the World Collection of Barley and Oats.Results and conclusions. Lodging resistance was observed to have a strong correlation with yield (r = 0.72) and plant height (r = –0.60), and a medium correlation with tillering (r = 0.40) and number of nodal roots at maturation (r = 0.44). No relationship was found between lodging resistance and morphological features of the second lowest internode, which means that selection of non-lodging forms by these criteria will not be effective. Lodging-resistant accessions demonstrated higher yield, tillering, productivity, 1000 grain weight, and a longer and denser ear compared to nonresistant accessions. Accessions combining high yield with lodging resistance and a set of traits promising for breeding were identified: ‘Belgorodsky 100’, ‘Naran’ (k-30892), ‘Kazminsky’ (k-30926), ‘Shchedry’ (k-31046) (Russia); ‘Syabra’ (k-30917), ‘Raider’ (Belarus); ‘Odesssky 115’ (k-29010, Ukraine), ‘Mie’ (k-30379, Estonia), ‘Rodos’ (k-30256, Poland).

Societal Impact Statement Micronutrients such as zinc and iron are critical for human health. For the world's population that relies on cereal products to obtain micronutrients, the bioavailability (absorption of nutrients in the gut) can be hindered by an anti‐nutritional compound, phytate. Phytate accumulation in grain is affected by soil properties including phosphorus availability and arbuscular mycorrhizal (AM) fungi. Here, we investigated the effects of AM fungi and soil phosphorus fertilization on micronutrient bioavailability in durum wheat and found that fertilization greatly decreased the bioavailability of micronutrients, but AM fungi can take up more micronutrients, which can lead to improved bioavailability when the soil is not fertilized. Summary The bioavailability of micronutrients (zinc [Zn] and iron [Fe]) in cereal crops such as durum wheat is critically important for human nutrition. Bioavailability is a product of complex interactions between plant phosphorus (P) uptake and storage in grain (as phytate), and plant micronutrient uptake. The bioavailability of Zn and Fe in cereal grain is affected by soil nutrient concentrations and associations with arbuscular mycorrhizal (AM) fungi, but has been scarcely studied. A geographically diverse collection of 101 durum wheat genotypes was surveyed for grain bioavailability of Zn and Fe. Ten genotypes were then selected and grown with and without AM fungal inoculation and soil P fertilization to understand the effects of manipulating soil P availability and uptake on micronutrient bioavailability. The strongest negative effect on grain micronutrient bioavailability was soil P fertilization, however, it also led to increased grain weight. Crop variety selection had the greatest variation in the P‐fertilized soil, but AM fungal inoculation had a positive effect on bioavailability in one variety in the non‐fertilized soil. In order to grow more nutritious durum wheat crops, variety selection and AM fungal inoculation are important considerations. In general, there is a trade‐off between grain weight (yield) and micronutrient bioavailability in grain that could be addressed through breeding P‐deficiency tolerant varieties.

Wyjazdy kolekcyjne są jednym z ważniejszych źródeł pozyskiwania materiałów w Krajowym Centrum Roślinnych Zasobów Genowych (KCRZG). Wybór Litwy jako obszaru poszukiwań zasobów genowych był związany z historycznymi relacjami z Polską. W latach 2011 – 2013 przeprowadzono trzy ekspedycje, podczas których zebrano 32 obiekty Avena sativa L. wraz z danymi paszportowymi. Zebrane próbki zostały wysiane na 2,5 m2 poletkach Instytutu Hodowli i Aklimatyzacji Roślin (IHAR-PIB) w Radzikowie w latach 2012, 2013, 2014. Na każdym poletku, ręcznie wysiano 600 nasion. Odnotowywano stan wylegania roślin, pojawiające się choroby, wyliczono masę tysiąca ziaren oraz plon. U większości obiektów wiechowanie występowało później niż u odmian wzorcowych. Lokalne obiekty odmian owsa były wyższe od wzorcowych obiektów a mimo to odznaczały się niskim stopniem wylegania. Lokalne odmiany owsa mogą stanowić źródło pojedynczych, unikalnych cech poszukiwanych przy tworzeniu nowych odmian.

The study was carried out under rainfall and support irrigation conditions based to the random block experiment design with four replication in Diyarbakir province during the 2018-2019 growing season. The aim was to determine the genotypes suitable for being a candidate variety by interpreting the interaction between quality characteristics and grain yield and to contribute to breeding studies. 25 genotypes was used in the experiment. Genotypes were evaluated in terms of agricultural characteristics and reactions to yellow rust disease. According to the variance analysis; It was determined that there is a negative relationship between grain yield and thousand grain weight Also, test weight with protein ratio and zeleny sedimentation amount. Ideal genotypes are G21 in grain yield, Tekin variety in test weight, G6 and G17 in thousand grain weight and protein ratio, G12 and G19 in zeleny sedimentation amount. G2, G8, G13, G18, G21, G22, G23 and G24 were found to be tolerant in terms of reaction to yellow rust disease. The lines that are the best in terms of related features were marked and it was concluded that it would be beneficial to repeat this study in the same location.

The research work was carried out in the conditions of the southeast of the Voronezh region in the fields of the Research Institute of Agriculture of the Central-Blackearth area named after V. V. Dokuchaev in 2015-2017. The weather conditions during the years of the trial were quite favorable. The water and thermal regimes provided optimal conditions for the growth and development of pea plants, 1.3 in 2015, 1.2 in 2016 and 1.1 in 2017. The purpose of the study was to identify the factorial components that determine the productivity of peas belonging to different morphotypes. There were selected highly productive lines as objects of study. Before harvesting there was selected a material for analysis, and there were determined the following indicators: plant height, number of productive nodes, number of beans per plant, number of grains in a bean, number of grains per plant, 1000 grains weight, grain weight per plant. The grain productivity was determined after harvesting with a combine in terms of 14% moisture content. As a result of the analysis, there was found that the formation of grain productivity in peas of a leafy morphotype in comparison with a leafless morphotype was provided by a greater number of fruiting nodes: 3.31 and 2.53 pcs/plant. respectively (+0.78 pcs/plant); beans per plant: 5.27 and 4.19 pcs/plant. (+1.08 pcs/plant); and grains per plant: 18.6 and 17.5 pcs/plant (+1.1 pcs/plant). The productivity of the samples with a leafless morphotype was due to a larger number of grains per bean: 4.24 and 3.61 pieces/bean (+0.63 pieces/ bean) and heavier grains: 236 and 228 g (1000 grain weight +8 d). Differences in the trait “number of grains per plant” and “1000 grain weight” were within the experimental error.

Malting quality will be greatly deteriorated when barley plants suffer from post-anthesis drought stress, however there is a marked difference among barley genotypes in the responses of malting quality to drought stress, and the molecular mechanisms underlying the genotypic difference remain unclear. We made transcriptome and metabolome analysis on the developing grains of two barley genotypes differing in the responses to drought stress. Post-anthesis drought treatments led to decreased grain weight and β-glucan content, increased grain protein content and β-amylase activity. Drought stress enhanced H2O2 and heat-shock protein accumulation in the two barley genotypes, with the drought-tolerant genotype showing higher capacity of scavenging H2O2 and reducing misfolded protein accumulation than the drought-susceptible genotype. Moreover, the drought-tolerant genotype was more efficient in redistributing assimilates stored in the vegetative tissues into the developing grains. After re-watering to relieve drought stress, the drought-tolerant genotype can further modify auxin transport and ethylene signaling, enhancing redistribution of assimilates into grains. Transcriptome comparisons and weighted correlation network analysis (WGCNA) identified some key genes regulating the responses of malting quality traits to drought stress, such as RLK-LRR, β-glucosidase and HSP . In conclusion, less change of main malting quality traits in the drought-tolerant genotype under post-anthesis drought stress is attributed to its higher capacity of alleviating the stress injury through scavenging ROS and redistributing the metabolites stored in the vegetative organs into the developing grains.

The state, selection achievements of triticale culture from Poland, its distribution, acreage, and yield are analyzed. In 2007 – 2009, 52 varieties of winter triticale were studied, in 2013 – 2016 — 17 varieties, and in 2018 – 2019 — 20 new varieties from Poland were tested in the Moscow oblast’. Polish short-stemmed varieties Grenado Argento and Korvetto under the conditions of Moscow and other regions have a complex of economically valuable features and properties, so they are used in the selection programs of scientific centers in Russia. In the 2017 – 2019, the study of the gene pool in the Moscow oblast’ identified Polish varieties Felo (k-4010), Hortense (k-4012), Preco/Kill/Rex/Aos/Rex, having a moderately short stem (95 – 110 cm), increased resistance to winter stress (7 – 9 points), snow mold (5 – 7 points) and brown rust (9 points), as well as a large, well-watered ear (56 – 59 achenes) with a grain weight of 2.8 – 3.1 g, 1000 grains — 50 – 52 g, and grains/m2 — 860 – 890 g. In 2007 – 2018 more than 100 Polish cultivars were studied using a set of indicators. The most valuable of them were used in the development of new, more advanced lines and varieties of triticale. Created with the introduction in the State register of highly productive (more than 10 tons/ha of grain) winter variety triticale Kapella. The source material for its production by the method of ecological mutagenesis was a variety of spring triticale from Poland (k-2045), which has a set of valuable indicators.

Our research work was carried out in the Westsik crop rotation field experiment in 2018. The main research purpose was to analyse the effect of the different organic and chemical fertilizers on parameters of rye. Our results revealed some differences between the different fertilization methods. One spike weight, grain weight of one spike, rye plant height, rye plant weight per m2 and 1000 seed weight in crop rotations VII, XV and VIII were different from the data of all crop rotations. This finding can be explained by the fact that crop rotations VII and XV were non-fertilized, only 23.3 t ha-1 straw manure (VII) or green lupine manure was applied as a second crop (XV). In addition, crop rotation VIII consists of four parts where we apply chemical fertilization with green lupine manure as a main and second crop. There is a positive close correlation between rye plant height and other studied characters (rye plant weight per m2, spike length, weight of one spike, grain weight per spike, spike weight per m2, grain weight per m2 and 1000 seed weight).

Field experiment was carried out to determine the degree of association and magnitude of direct and indirect effects between grain yield and yield attributing characters for 18 slender grain rice varieties for six characters. Growth and yield of rice plant is influenced by interaction of genetic and environmental factors. Knowledge on degree of relationship between the traits confirming yield are useful to breeder to choose the traits to give significant results in selection process. Correlation and path analysis studies were carried out during 2018 kharif season. The results revealed that plant height and number of effective tillers per plant recorded significant positive association with panicle length whereas 1000 grain weight recorded significant positive correlation with grain yield. Therefore in present study selection of characters like number of effective tillers per plant and plant height showing more genetic advance and characters like panicle length and 1000 grain weight having direct positive effect resulted in increasing yield of slender grain rice varieties. Keywords: Slender grain rice , yield, yield components, correlation, path analysis Cite this Article Nidanapati Karanam Gayathri, Muchchukota Subbara. Studies on Character Association and Path Analysis in Slender Grain Rice (Oryza sativaL.) Varieties. Research & Reviews: Journal of Agriculture Sciences and Technology . 2020; 9(1): 30–33p.

An experiment on response of wheat (Triticum aestivum L.) varieties to different levels of nitrogen under rain fed condition was conducted at ITM University Gwalior (M.P.) to find at the optimum levels of nitrogen and suitable wheat varieties to grid region of Madhya Pradesh. Three levels of nitrogen (40, 60 and 80 Kg ha-1) in main plot and four Varieties (PBW613, C-306, PBW644 and PBW660) in sub plots were tested in split plot design with four replications. Number of plants per meter length, plant height, dry matter, and days to maturity; number of ear heads m-1 row length, spike length, number of spike lets per spike, grains per spike and grain weight per spike, and grain, straw and biological yield increased significantly with increase in nitrogen level from 40 to 60 Kg ha-1. Among varieties maximum shoot length, dry weight accumulation, number of grain spike-1, weight of grain spike,-1 length of spike and grain and straw yield and biomass was observed in variety C306 as compared to all other varieties. For the grid region of northen Madya Pradesh, growing of wheat variety C306 with 60 Kg N ha-1 under rain fed condition found promising.

Pearl millet, a versatile and historic coarse grain crop, is stable food for millions of people in India and sub-Saharan Africa. As part of a key initiative to increase its grain mineral content, an investigation was carried out with line × tester analysis to generate information on magnitude of heterobeltiosis and standard heterosis, gene effects, combining ability effect of parents and hybrids for grain yield, grain weight and grain minerals (iron, zinc, copper and manganese). The partitioning of variance due to parental genotypes revealed that lines and testers significantly differed for studied traits. The per se performance of hybrids was higher than parents in desired directions for most of the characters suggesting the possibility of heterotic hybrids. The potence ratio was less than 1 for all traits except Fe. The analysis of variance for combining ability revealed importance of both additive and non-additive components of genetic variance. On the basis of per se performance and combining ability analysis cross ICMA 98444 × AIB 220 may be directly exposed for commercial cultivation and may be advanced for development of parental genotypes. During SSR marker based study, maximum PIC value was revealed by Xpsmp 2203 (PIC value = 0.92). Clustering analysis could group parental genotypes in three main clusters. The genetic distance among 15 genotypes ranged from 0.29 to 0.83. The genetic relationships identified among the male sterile/restorer lines may be useful in designing strategies to improve the genetic variation in the context of pearl millet breeding and to develop heterotic crosses. Keywords: Combining ability, Heterosis, Minerals, Pearl millet, SSR markers

Two field experiments were conducted at the experimental farm of Sakha Agricultural Research Station ARC, Kafr El-Sheikh, Egypt, during two winter successive seasons 2016/17 and 2017/18 to determine the effect of two planting dates (23 November and 23 December) on yield and its components of 14 bread wheat genotypes. The experimental design was randomize complete bloke with three replications. Each sowing date is sown in separated experiment, the first experiment was planted on 23 Nov.(recommended sowing date), while late one were on 23 Dec. in both seasons, Results indicdated that , heading and, maturity dates, grain filling period and rate, plant height, grain weight, number of grains/spike, number of spikes/m2, grain and straw yields and harvest index were significantly affected by sowing dates. Recommended sowing date (23 Nov.) recorded the highest value for each of character in both growing seasons. Sids 4 and Line 10 were the earlier genotypes for days to heading and maturity. Misr 2 and Line 8 were the best genotypes for grain filling rate, grain and straw yield in both seasons. Whereas, Misr 2 recorded the highest value for each of plant height and No. of spikes/m2. Line 7 recorded the highest value for each of grain weight and harvest index. For tolerance index (TOL), the lowest values were recorded for Lines 9, 11 and 10, respectively. With regard for yield reduction, the lowest values were obtained by Misr 2 and line 9. Therefore, Misr2 and line 9 recommended to sowing in both recommended and late sowing date in North Delta region.

AP2/ERF is a plant‐specific transcription factor superfamily regulating plant growth, development and responses to multiple stresses. However, the roles of ERF genes in the growth and development of wheat (Triticum aestivum L.) remain elusive. In this study, a novel ERF gene TaERF73 was cloned from wheat. qRT‐PCR analysis showed that TaERF73 is predominantly expressed in roots. It responds to treatments of auxin, MeJA, ABA, low temperature and drought stresses. Ectopic expression of TaERF73 in rice caused short root length, indicating that TaERF73 is a negative regulator of root growth. Four SNPs were detected in TaERF73‐4B coding region through sequence polymorphism analysis. A dCAPS (derived cleaved amplified polymorphic sequence) molecular marker was developed based on the SNP at 119 bp (G/C) of TaERF73‐4B. Association analysis between genotypes and agronomic traits revealed that Hap‐4B‐2 is a haplotype of TaERF73‐4B associated with shorter plant height, higher thousand‐grain weight and longer root depth. The distributions of haplotypes in ten Chinese major wheat zones suggested that Hap‐4B‐2 has been positively selected in the breeding process. Together, the ERF gene TaERF73 is associated with root depth, plant height and thousand‐grain weight under drought, heat and well‐watered conditions. The molecular marker developed in this study could be a valuable source for marker‐assisted selection and genetic improvement in wheat.

Purpose and objectives - to determine the breeding value of spring barley cultivars and lines.Materials and methods: Twenty-two cultivars and 3 lines of spring barley were taken as the test material. The field experiments were carried out in the competitive variety trial nursery in compliance with the method of state variety trials. The forecrop was grain pea. The plot area was 10 m2; the experiments were carried out in 4 replications. Barley was sown with a breeding seeder SSFK-7. The yield, growing period length, lodging resistance, performance and its structural elements were determined. Calculus of variations analysis of variance were performed in STATISTICA 10 and EXCEL as BA Dospekhov described.Results and discussion: The peculiarities of 22 cultivars and 3 lines of spring barley were described by expression levels of the following quantitative traits: morpho-biological (performance, total and productive tillering capacity, spikelet and grain number per spike, spike length, grain weight from the main ear and lateral stalks) and economic (yield, growing period length, lodging resistance) ones.The variability of quantitative traits of the accessions under investigation was determined. In particular, the plant height variability was low (9.5%), the spike length and grain weight from the main spike variabilities were medium (15.6 and 19.5%, respectively), and the variability of other traits were high.The analysis distinguished intensive high-yielding cultivars Margret, Grace, Avhur, Datcha, Khors, and Troian and the line 14-561 (5.07–4.84 t/ha); lodging-resistant cultivars Amil, Troian (Lider), Datcha, and Grace and line 15-139; and high performance cultivars Amil, Khors, Hatunok, Akhiles, and Krasen.Conclusions. As a result of determining the characteristics of the spring barley accessions with high levels of expression of quantitative morpho-biological and economic traits, the breeding value of cultivars and lines suitable for combination breeding was evaluated.

Seventeen genotypes of wheat were used in this study the results showed significant differences in respect of yield and other yield contributing characters. Highest phenotypic and genotypic coefficients of variations were observed in plant height and lowest values were observed in spike length in both cases.Heritability estimated was found to be high in case of grain yield/plant and this was followed by 100 grain weight. Significant positive correlation was found in plant height with number of fertile tillers/plant and grain yield/plant, fertile tillers/plant with spike length, spike length with grain yield and grain yield with 100 grain weight. Negative correlation was found in plant height with 100 grain weight. Plant height, fertile tillers/plant, spike length and 100 grain weight appeared to be the effective criteria for improvement of yield of wheat. J. bio-sci. 28: 81-86, 2020

Low zinc (Zn) availability in various agricultural soils including Vertisols adversely affects wheat production. The variations among the wheat genotypes to produce high grain yield and Zn uptake under low Zn supply were investigated to find out the Zn-efficient genotypes. Twenty-five different wheat genotypes were evaluated in the field with two levels of Zn, viz., low (no Zn fertilizer) and high (20 kg of Zn ha−1 applied as Zn sulfate heptahydrate (ZnSO4.7H2O) (21% Zn)) along with three foliar applications of Zn at ear initiation, flowering, and milking stage of wheat growth. Thousand grain weight, grain yield, grain Zn concentration, and Zn uptake of wheat genotypes differed significantly and increased due to Zn application. Among the genotypes, grain yield efficiency index (i.e., relative grain yield) varied from 85.0 to 98.6 and Zn uptake efficiency (i.e., relative grain Zn uptake) varied from 60.9 to 88.5. Considering grain yield efficiency index and Zn uptake efficiency index, the genotypes were categorized as efficient and responsive (JW-3211, GW-322, PBW-502, HD-2864, UP-2554, HI-8627, GW-190, SUJATHA-HI-627), efficient and non-responsive (HD-2932, LOK-1, PBW-175), inefficient and responsive (HD-4672, GW-366, UP-2628), and inefficient and non-responsive (HW-2004, WH-147, HI-1418, DL-803-3, PBW-343, HD-2733, UP-2565, JW-17, C-306, AKW-4627, HI-1500). The efficient and responsive genotypes are the most useful ones as they provide higher yield under low Zn supply and also respond to Zn fertilizer application. The inefficient and responsive genotypes may be utilized by the plant breeders to identify the responsive traits for their incorporation in modifying the efficient and non-responsive genotypes.

The survey was conducted during the period 2015-2017 in the experimental field of IPGR Sadovo. The elements of productivity of 29 common winter wheat varieties (Triticum aestivum L.) with origin from Belarus and two Bulgarian varieties – Sadovo 1 and Enola were studied. The coefficient of variation has been calculated and the correlation dependencies between the elements of productivity are determined. The influence of factors genotype, environment and their interaction on the studied features is assessed. A low variation in the trait was recorded in the number of spikelets per spike, spike length and number of grains per spike. With high variation is characterized the number of grains per other spikes. The strongest correlation dependence is observed between features grain number per plant with grain number per other spikes, followed by the grain weight per plant with grain weight per other spikes. The plant height is in negative correlation with all studied elements of productivity. The factor genotype has the greatest influence on the plant height and the cultivation conditions have a leading role in the productive tillering.

The article discusses the results of a four-year study (2016-2019) of breeding lines of spring soft wheat of the selection of Federal Agricultural Research Center of the North-East named N.V. Rudnitsky in the soil and climatic conditions of the central and southern parts of the Volga-Vyatka region. The promising lines C-65, C-103, H-154 were selected as they exceeded the regionalized standard variety Simbirtsit in average yields (3.41...3.56 t/ha; the increase is 0.04...0.19 t/ha), and in terms of potential yield (5.61…6.93 t / ha; the increase is 0.48...1.80 t/ha). According to the long-term average indicators of the crop structure, the selection lines П-57, P-63, С-65 and С-103 were attributed to the sources of valuable properties. Genotypes P-63, H-154 showed higher values and stability of gluten formation in grain relative to the variety Simbirtsit (22.8-24.1%; the increase to the standard is 3.1 - 4.4%). Using the variation coefficient, the degree of variability of economically useful traits (productive bushiness, plant height, ear length, number of grains per ear, grain weight per ear, 1000 grain mass, yield, gluten content in grain) was determined in different ecological environments. It has been established that the variability values of individual characteristics of productivity in one variety are not always consistent with each other and have genotypic conditionality. Yield stability can be closely related to the level of variation of individual elements of its structure. Genotypes that were more stable in yield indicated high variability of productive bushiness and low variability of plant height, grain weight per spike, and mass of 1000 grains. It has been shown that from practical point of view the most valuable genotypes were the ones with steadily high values of the spike length and the number of spike grains, as having a high adaptive response to cultivation conditions.Conflict of interest: the authors stated that there was no conflict of interest.

Grain weight and grain number, the two important yield traits, are mainly determined by grain size and panicle architecture in rice. Herein, we report the identification and functional analysis of OsSPL4 in panicle and grain development of rice. Using CRISPR/Cas9 system, two elite alleles of OsSPL4 were obtained, which exhibited an increasing number of grains per panicle and grain size, resulting in increase of rice yield. Cytological analysis showed that OsSPL4 could regulate spikelet development by promoting cell division. The results of RNA-seq and qRT-PCR validations also demonstrated that several MADS-box and cell-cycle genes were up-regulated in the mutation lines. Co-expression network revealed that many yield-related genes were involved in the regulation network of OsSPL4. In addition, OsSPL4 could be cleaved by the osa-miR156 in vivo, and the OsmiR156-OsSPL4 module might regulate the grain size in rice. Further analysis indicated that the large-grain allele of OsSPL4 in indica rice might introgress from aus varieties under artificial selection. Taken together, our findings suggested that OsSPL4 could be as a key regulator of grain size by acting on cell division control and provided a strategy for panicle architecture and grain size modification for yield improvement in rice.

In order to identify QTLs for 1000-grain weight and its main component traits in wheat, a high-density genetic link map was constructed using a F8:9 recombined inbred line (RIL) population as material and exploiting the single nucleotide polymorphism (SNP) as well as PCR-based molecular markers, and to go a step further, QTL mapping for 1000-grain weight, grain length, and grain width in wheat was conducted. The linkage map was composed of 1257 loci formed by the 3916 markers, including 143 SSR markers and 3773 SNP markers, which were distributed on 22 chromosomes (2A chromosome formed a break point) with the total length of 2291.6 cM and the average genetic distance between loci of 1.82 cM. A total of 41 qualitative trait loci (QTLs) on 19 chromosomes were detected, with contributions to phenotypic variance ranged from 3.59–58.49% for each QTL. Among these QTLs, two were detected in four environments, six in three environments, and 14 in two environments. Fifteen important loci with multi-effect were mapped on 9 chromosomes 1B, 2B, 3A, 4B, 5A, 5B, 6A, 7A, and 7B, involving 37 QTLs that accounted for 90.2% of total numbers of QTLs detected. Of these 15 loci, including one on chromosome 7A flanked by the markers Tdurum_contig77759_5 and BS00062425_51, which consisted of QTLs controlling TGW, GL, and GW and explained 4.2 to 58.49% of the phenotypic variation in these traits. Thus, the chromosome intervals of the 15 loci were important areas controlling the expression of 1000-grain weight and its main component traits in wheat.

A study was conducted to determine the optimum rates of N, P, K fertilizers on “IPB 9G” upland rice variety from March to July 2018 at the Sawah Baru Experimental Field of IPB University, West Java, Indonesia. Three paralel experiments were carried out in a randomized complete block design to test five fertilizing levels, i.e. 0, 50, 100, 150 and 200% of the reference rate. The reference rates of fertilizer application are 100% N = 200 kg Urea ha-1, 100% P = 100 kg SP36 ha-1, and 100% K = 100 kg KCl ha-1. The applied fertilizers were Urea (46% N), SP36 (36% P2O5) and KCl (60% K2O). Fertilizers were applied three times, 40% at planting, 30% at 4 WAP and the rest 30% at 8 WAP; 100% P and 100% K were applied at planting. Increasing N fertilizer from 0 to 200% of the reference rate increased plant height, dry weight biomass at heading and at harvest, number of productive tillers, harvest index, and grain weight per clump. P increased dry weight of the above ground biomass, whereas K fertilizer increased the leaf area, canopy dry weight, number of grain per panicle, panicle length, harvest index and grain weight per clump. The optimum rate of N and P were 107.09 kg Urea ha-1 and 63.3 kg P2O5 kg.ha-1, respectively, whereas the optimal rate for K fertilizer for “IPB 9G” could not be determined with this study.

The importance of vegetable oils and oilseeds, which have an important role in human nutrition and many branches of industry, is increasing day by day. Soybean is one of the most important industrial plants in the world. Despite having the most suitable agricultural land to cultivate soybean, Turkey meets through imports almost all of its soybean needs. The aim of this study is to determine the suitability of soybean genotypes as second crop production for Diyarbakır conditions. In this study, KA-04.03.07, KA-04.06.01, KKMA-118, KSA-26, S-02.14.11, S-03.03.7, Sa-01.08.15 advance lines and Arısoy, Blaze, SA-88 Bravo, Ataem-7, Umut-2002 and GAPSOY-16 varieties were used as materials. According to the results of the research, average grain yield of genotypes was 2,37 t/ha and highest grain yield was obtained from GAPSOY-16 (4,00 t/ha) variety, followed by S-03.03.7 line (3.66 t/ha). The lowest grain yield value was obtained from Umut-2002 (1,33 t/ha) variety. As a result of the correlation analysis, a positive and significant relationship was found between grain yield and thousand grain weight. It is concluded that GAPSOY-16 variety and S-03.03.7 line can be successfully grown as second crop in Diyarbakır province.

Grain size is a major determinant of grain weight, which is one of the components of rice yield. The objective o this study was to identify novel, and important quantitative trait loci (QTLs) for grain size and weight in rice. QTLs were mapped using a BC4F4 population including 192 backcross inbred lines (BILs) derived from a backcross between Xiaolijing (XLJ) and recombinant inbred lines (RILs). The mapping population was planted in both Lingshui (Hainan, 2015) and Fuyang (Zhejiang, 2016), with the short- and long-day conditions, respectively. A total of 10 QTLs for grain length, four for grain width, four for the ratio of grain length to width, and 11 for grain weight were detected in at least one environment and were distributed across 11 chromosomes. The phenotypic variance explained ranged from 6.76–25.68%, 14.30–34.03%, 5.28–26.50%, and 3.01–22.87% for grain length, grain width, the ratio of grain length to width, and thousand grain weight, respectively. Using the sequential residual heterozygotes (SeqRHs) method, qGS7.1, a QTL for grain size and weight, was mapped in a 3.2-Mb interval on chromosome 7. No QTLs about grain size and weight were reported in previous studies in this region, providing a good candidate for functional analysis and breeding utilization.

Background. An extremely important task today is to develop new hulless barley cultivars, capable of yielding large and high-quality grain harvests, and introduce them into agricultural production. Objective. The purpose was to study three hulless barley cultivars ‘Omsky golozerny 2’, ‘Omsky golozerny 4’ and ‘Maysky’, developed at Omsk Agrarian Scientific Center, in order to describe their agrobiological characteristics.Materials and methods.The experimental part of the work was carried out in 2015–2017 on the experimental fields of Omsk ASC in the southern forest steppe (third crop rotation after the wheat predecessor; fourth crop after fallow). There were 4 replications on the plot of 10 m2. The seeding rate was 4 million viable seeds per 1 ha. Agricultural practice used in the experiments was conventional for West Siberia. Parameters of stability and plasticity were calculated according to Eberhart and Russell, Wricke; adaptability, according to Zhivotkov; homeostasis, according to Khangildin; stress tolerance and compensatory ability, according to Rossielle and Hemblin.Results. Many years of breeding work at Omsk ASC resulted in the development of three hulless barley cultivars: ‘Omsky golozerny 2’ (listed in the State Register of the Russian Federation for regions 9, 10 and 11), ‘Omsky golozerny 4’ (submitted for the State Crop Variety Trials in 2017), and ‘Maysky’ (not included in the State Register). The new hulless barley cultivar ‘Omsky golozerny 4’, considering its higher productivity (+1.36 g to the reference in 1000 grain weight, and +0.73 t/ha to cv. ‘Maysky’), in the yield of nutrients per area unit equaled the reference ‘Omsky golozerny 2’, but exceeded ‘Maysky’ (+47.2 kg/ha of protein, +390 kg/ha of starch, and +42.4 kg/ha of crude fat). ‘Omsky golozerny 4’ was also characterized by stability (stability = 4.8), increased compensatory ability (3.29) and adaptability (103%). There was an increase in productivity with improved growing conditions (ecological plasticity = 1.25). ‘Maysky’ had higher stress tolerance (–1.35), while the reference ‘Omsky golozerny 2’ showed increased homeostasis (0.118). Thus, ‘Omsky golozerny 4’ exceeded the previous two cultivars in adaptability and stability.