31 results on '"Non-additive"'
Search Results
2. Enhancing Maize Yield: Analyzing Combining Ability and Superiority of Newly Developed Inbreds for High Yield through Diallel Analysis.
- Author
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Ismail, M. R., Aboyousef, H. A., Alsebaey, R. H. A., Afife, A. A. M., and Shalof, M. S.
- Subjects
HYBRID corn ,RESEARCH departments ,FIELD crops ,GRAIN yields ,AGRICULTURAL research ,CORN - Abstract
Copyright of Journal of Plant Production is the property of Egyptian National Agricultural Library (ENAL) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2024
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- View/download PDF
3. ESTIMATION OF COMBINING ABILITY EFFECTS FOR YIELD AND FATTY ACID-RELATED TRAITS IN BRASSICA RAPA USING LINE BY TESTER ANALYSIS.
- Author
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MUSTAFA, S. E., RAZZAQ, H., KHAN, F. A., and KHAN, S. H.
- Subjects
- *
EDIBLE fats & oils , *BRASSICA , *RAPESEED oil , *GENETIC variation , *RAPESEED - Abstract
Brassica rapa is an important oilseed crop in Pakistan. It is a rich source of oil and contains 40%-46% oil. In addition, its meal has 38%-40% protein. Given their high levels of erucic acid and glucosinolate, mustard and rapeseed oil is unhealthy as regular cooking oil. A dire need to exploit the genetic variability of rapeseed germplasm is necessary to improve the performance of cultivars. The line × tester analysis helped estimate various types of gene actions that are important to quantitative traits. The key to successful research is selecting suitable lines and testers and designing good mating patterns. Choosing and developing genotypes with high yield and fatty acid profiles are the major concern of rapeseed breeders. The current research on hybridization and evaluation of Brassica rapa accessions sought better harvest and its related traits from the selected germplasm. The combining ability effects determination used line × tester analysis in rapeseed. The accessions' variability analysis exhibited extremely significant differences in yield and related traits. Recorded data for different morphological and yield-related qualities provided days till 50% flowering, the number of major branches per plant, and the number of secondary branches per plant had positive and significant general combining ability estimates, and all yield-related variables had extremely notable specific combining ability estimates. All the yield-related characteristics displayed a favorable and substantial connection in the examined germplasm. Among the lines, 28244, 40980, and 40981 occurred to be the best general combiners showing the additive gene action. The cross combinations, 40977 × 26283, 40979 × 26283, and 40981 × 26283, indicated significant specific combining ability effects, which showed the non-additive genetic effects of total variance due to the dominance and/or epistasis. The results suggested that the research material used in the remarkable study can benefit by improving yield and fatty acids-related components and can further enhance upcoming breeding programs based on strong particular combining ability impacts. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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4. Genetic Component and Vr-Wr GraphicalAnalysis in Blackgram [Vigna mungo (L.) Hepper]
- Author
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Sharma, Neha, Mittal, R.K., and Sood, V.K.
- Published
- 2022
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5. Genetic analysis of fruit yield and its components in bottle gourd [Lagenaria siceraria (mol.) standl.]
- Author
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Balat, J.R., Patel, J.B., Delvadiya, I.R., and Ginoya, A.V.
- Published
- 2022
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6. Genetic Component and Vr-Wr Graphical Analysis in Blackgram [Vigna mungo (L.) Hepper].
- Author
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Sharma, Neha, Mittal, R. K., and Sood, V. K.
- Subjects
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BLACK gram , *SEED yield , *PLANT yields , *PLANT proteins , *HEREDITY , *GENOTYPES - Abstract
Background: To develop a new high yielding variety, it is important to generate utilitarian recombinants and devise an appropriate strategy for selection and advancement of those recombinants. Methods: Keeping this in mind, genetic components of yield and its related traits were determined in nine genotypes of blackgram through half diallel analysis using Hayman’s numerical and graphical approach. Conclusion: The estimates of genetic components deduced the role of non-additive gene action in the inheritance of all traits. The Vr-Wr graphical analysis revealed that assumptions laid by Hayman for diallel analysis were seldom fulfilled. Epistatic effect was predominant in all traits except days to 75 per cent maturity. Unidirectional dominance was observed in days to 75 per cent maturity, pods per plants and seed yield per plant and crude protein content. One major gene group was found controlling all traits except days to 75 per cent maturity and branches per plant. These findings can be used by breeders to devise appropriate selection methodology for yield improvement in blackgram. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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7. Gene action in low nitrogen tolerance and implication on maize grain yield and associated traits of some tropical maize populations
- Author
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Sunday Ige, Babatunde Ajiboye, Stephen Abolusoro, Charity Aremu, and Kayode Obaniyi
- Subjects
gene action ,gca and sca ,additive ,non-additive ,maize ,Agriculture ,Agriculture (General) ,S1-972 - Abstract
Understanding the mode of inheritance of traits is vital in the selection of breeding methods for the grain yield and improvement of associated traits in a target environment. Combining ability is one of the powerful indices for the selection of the best cross combinations, parental lines that combine with other lines and the best breeding method for high grain yield improvement programmes. A total of 45 crosses were generated from ten maize varieties developed in low nitrogen environment in a diallel mating fashion without reciprocal. The resultant progenies were investigated in low- and highnitrogen soil to identify the mode of grain yield inheritance and those of related traits in the tested environments. Mean square analysis revealed the preponderance of additive and non-additive gene actions in the expression of maize grain yield and related characters tested under stress and optimal conditions. In this study, it is proved that both standard selection and hybridization breeding strategies are effective for the improvement of most traits involved. This experiment also confirmed the adequacy of sufficient variation in the gene pool present in the maize population that could be exploited in maize grain yield improvement programmes in the tropics. The ratio of SCA to GCA however emphasized the superiority of additive gene effects in the expression of most traits in the tested environments. The results, therefore, suggest that additive gene actions primarily condition the expression of maize grain yield and associated characters in the tested environments. Therefore, suggesting that the standard selection method would be effective for the improvement of most traits tested under the two environments.
- Published
- 2020
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8. PERFORMANCE AND COMBINING ABILITY FOR STRAW YIELD AND RELATED CHARACTERS IN A DIALLEL CROSS OF FLAX (Linum usitatissmum, L.) UNDER DIFFERENT SOWING DATES
- Author
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Amany Sayed, A. El-Marakby, Afaf Tolba, and Sabah Abo El-Komsan
- Subjects
flax ,performance ,combining ability ,additive ,non-additive ,sowing dates ,Agriculture - Abstract
Thirty six entries of flax (Linum usitatissmum, L.) involving eight parental genotypes and their twenty eight hybrids were evaluated for straw yield and its related traits in the F1 during (2015/2016) and F2 populations during (2016/2017) under early (F2D1) and late (F2D2) sowing dates (two environments) in the Agricultural Research Station, Faculty of Agriculture, Ain Shams Univ., Shalakan, Kalubia Governorate. Mean squares due to genotypes, parents and crosses were highly significant for straw yield, plant height, technical stem length, fiber yield/plant, fiber percentage, fiber length and fiber fineness in the F1 and F2 generations (at early and late sowing dates), indicating that parental genotypes as well as their F1 and F2 generations exhibited reasonable degree of variability for all studied traits. Highly significant variations mean performance were found for parental genotypes and hybrids for straw yield/plant and its related traits in the F1, F2D1and F2D2, indicating presence of wide genetic variability among studied genotypes. The highest mean values were recorded under all studied environments, for straw yield/plant, fiber yield/plant and fiber fineness were found by S. 402/1 genotype, while Sakha 5 gave the highest mean values for plant height, technical stem length and fiber length. General and specific combining ability mean squares were highly significant for all studied traits in F1, F2D1 and F2D2 with the exception of a few cases, indicating the importance of both additive and non-additive gene effects in the expression of straw yield and its components. The additive effects were more important than non-additive effects under all studied environments for straw yield/plant (except at F2D2), plant height (except at F1), fiber percentage and fineness. On the other hand, the non- additive effects were more effective than additive effects for technical stem length, fiber yield/plant and fiber length. Results showed that the parents; Giza 11and Giza 12 for straw yield/plant, Sakha 5 for plant height and fiber length, Sakha 6 for fiber yield/plant, Jowhar for fiber percentage and S. 402/1, Sakha 2, Giza 12 and Sakha 5 for fiber fineness, these parents appeared to be the best general combiners for these traits. Some of the crosses exhibited highly significant and positive SCA effects included high x high and high x low general combiner parents, suggesting that the breeding procedure which utilize both additive and non-additive genetic variances would be more useful for improvement of straw yield and its components of flax.
- Published
- 2019
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9. COMBINING ABILITY OF NEWLY DEVELOPED WHITE MAIZE (Zea mays L.) INBRED LINES VIA TOP CROSS ANALYSIS.
- Author
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Mohamed, Hany A. A.
- Subjects
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GRAIN yields , *SUMMER , *AGRICULTURAL research , *PH effect , *CORN breeding , *CORN - Abstract
Twelve newly developed white maize inbred lines were crossed with two testers i.e. SC 128 and SC 131 at Ismailia Agricultural Research Station during 2017 season. In 2018 summer season, the 24 top crosses and two white commercial check hybrids; TWC 321 and TWC 324 were evaluated under two locations (Loc); Ismailia and Mallawy Agricultural Research Stations. The studied traits were number of days to 50% silking (DS), plant height (PH), ear height (EH), ear length (EL), ear diameter (ED), number of rows/ear (RE), number of kernels/row (KR) and grain yield (GY). Mean square due to locations were significant for DS, EL, KR and GY traits. The crosses were significant for all studied traits, except PH trait. Mean square due to lines were highly significant for all traits except PH, EH, and KR. Mean square due to testers were highly significant for EH and GY. Also, mean square attributed to lines x testers interaction were highly significant for all traits except for DS, PH, and RE. The interactions of locations (Loc) with crosses and Loc x lines were highly significant for the studied traits except for PH. The superior inbred line Ism 6007 had desirable general combining ability (GCA) effects for grain yield and yield components. Also, the inbred line Ism 7100 showed better GCA effects for PH, EH, ED, RE and GY traits and inbred line Ism 7094 for earliness and grain yield. The tester SC 128 showed the highest GCA effect for grain yield. The best crosses for specific combining ability (SCA) effects were Ism 6040 x SC 128, Ism 7094 x SC 128, Ism 7169 x SC 128, Ism 7186 x SC 131 and Ism 7259 x SC 131 for grain yield and cross Ism 6007 x SC 131 for earliness, grain yield, and yield components. The non-additive gene effects were more important in controlling all studied traits. Moreover, non-additive gene effects were more interacted by environmental conditions than additive gene effects for all studied traits. The highest mean values and significant of crosses for grain yield (GY) were obtained from the Ism 6040 x SC 128 (37.5 ard/fad.), Ism 6007 x SC 131 (37.0 ard/fad.), Ism 7169 x SC 128 (36.7 ard/fad.), and Ism 7094 x SC 128 (35.5 ard/fad.). These three ways crosses out yielding significant than the commercial hybrids TWC 321 (33.7 ard/fad.) and TWC 324 (32.5 ard/fed). These promising hybrids should be tested in advanced trails. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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10. Combining ability studies for yield and yield components in chilli (Capsicum annuum L.)
- Author
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Janaki, M., Babu, J. Dilip, Naidu, L. Naram, Ramana, C. Venkata, Rao, C. K. Koteswara, and Krishna, K. Uma
- Published
- 2017
- Full Text
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11. Combining ability for yield and yield attributing characters in brinjal (Solanum melongena L.)
- Author
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Desai, K.M., Saravaiya, S.N., Maheta, V., and Patel, D.A.
- Published
- 2017
- Full Text
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12. Combining ability for yield and different characters in brinjal (Solanum melongena L.)
- Author
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Desai, K.M., Saravaiya, S.N., and Patel, D.A.
- Published
- 2017
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13. Combining ability studies for yield and yield components in chilli (Capsicum annuum L.)
- Author
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M. Janaki, J. Dilip Babu, L. Naram Naidu, C. Venkata Ramana, C. K. Koteswara Rao and, and K. Uma Krishna
- Subjects
chilli ,capsicum annuum ,combining ability ,additive ,non-additive ,Plant culture ,SB1-1110 - Abstract
The present investigation was carried out at Horticultural Research Station, Lam farm, Guntur, Andhra Pradesh during kharif, 2013-14 and 2014-15 to estimate the combining ability effects employing the line x tester mating design with nine lines and six testers. The analysis of variance revealed that significant differences among the parents and crosses for all the 12 characters studied. Six characters viz. fruit yield per plant, plant spread, days to 50% flowering, days to fruit maturity, number of fruits per plant and number of seeds per fruit were exhibited higher magnitude of sca variances than gca variances which revealed that non-additive gene action was played an important role in the inheritance of these trait. According to gca effects, the genotypes LCA-442, LCA-654, LCA-655, LCA-703-2 and LCA-453 found to be promising general combiners for yield and yield components. The sca effects revealed that nine crosses viz., LCA 466 x LCA 705-2, LCA 607 x LCA 703-2, LCA 355 x LCA 678, LCA 504 x LCA 705-2, LCA 446 x LCA 703-2, LCA 615 x LCA 453, LCA 442 x LCA 453, LCA 607 x G4 and LCA 654 x LCA were identified as promising hybrids for fruit yield and it’s yield component characters.
- Published
- 2017
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14. Combining ability for yield and different characters in brinjal (Solanum melongena L.)
- Author
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K.M. Desai, S.N. Saravaiya and, and D.A. Patel
- Subjects
combining ability ,brinjal ,sca ,additive ,non-additive ,Plant culture ,SB1-1110 - Abstract
A field experiment was carried out with a view to estimate, combining ability and gene effects in brinjal (Solanum melongena L.). The experimental material comprised of 37 genotypes including 8 parents, 28 hybrids and one standard check (Surati Ravaiya) was laid out in Randomized Block Design with three replications at Regional Horticultural Research Station (R.H.R.S.), Navsari Agricultural University, Navsari, Gujarat during Rabi 2015-16. Combining ability analysis revealed that both additive as well as non-additive gene effects were important in the inheritance of all the traits studied. However, magnitude of variances due to sca was comparatively larger than those of gca for most of the economic traits indicated preponderance of non-additive gene action. Among the parents, JBGR-1, NSR-1 and JBL-08-8 were good general combiners for majority of the traits. The crosses viz., AB-09-1 × AB-12-10, AB-09-1 × AB-08-5, AB-08-5 × JBL-08-8 and GJB-3 × AB-12-10 showed higher order sca effects in addition to performance for fruit yield and its component characters.
- Published
- 2017
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15. Combining ability analysis for growth and yield characters in chilli (Capsicum annuum L)
- Author
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Nagaraju, Mopidevi M and Sreelathakumary, I
- Published
- 2016
16. Genetic analysis for fruit yield and its component traits in brinjal (Solanum melongena L.)
- Author
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Devmore, J.P., Bhave, S.G., Burondkar, M.M., Dhekale, J.S., and Sawardekar, S.V.
- Published
- 2016
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17. Genetic analysis for fruit yield and its component traits in brinjal (Solanum melongena L.)
- Author
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J.P. Devmore, S.G. Bhave, M.M. Burondkar, J.S. Dhekale and, and S.V. Sawardekar
- Subjects
gene action ,additive ,non-additive ,generation mean ,brinjal ,Plant culture ,SB1-1110 - Abstract
An investigation was undertaken with a view to study the nature and magnitude of gene action for 10 quantitative traits among five crosses of brinjal through generation mean analysis. The study involved six generation viz., P1, P2, F1, F2, BC1 and BC2 of five crosses derived from six diversified parents. The results indicated that the magnitude and type of gene effects differed for the same trait in different cross combinations. Therefore, for the improvement of particular trait, segregating generations of individual crosses should be handled according to the gene action involved in its inheritance. Additive [d], dominance [h], additive x additive, dominance x dominance gene actions were equally important for primary branches per plant, fruit breadth, fruit weight, yield per plant and seeds per fruit in most of the crosses. The complimentary type of epistasis was detected for inheritance of days to first flowering and days to first fruit picking in BNDT x PPC, number of fruits per plant in PPC x BB 64, yield per plant in N-1007 x BB-64 and KASARALI x PPC, while duplicate type of epistasis was important for inheritance of remaining traits in all the crosses except in BNDT x PPC.
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- 2016
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18. POPE: Pipeline of Parentally-Biased Expression
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Missirian, Victor, Henry, Isabelle, Comai, Luca, Filkov, Vladimir, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Istrail, Sorin, editor, Pevzner, Pavel, editor, Waterman, Michael S., editor, Bleris, Leonidas, editor, Măndoiu, Ion, editor, Schwartz, Russell, editor, and Wang, Jianxin, editor
- Published
- 2012
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19. Interactions among stressors may be weak: Implications for management of freshwater macroinvertebrate communities.
- Author
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Kath, Jarrod, Thomson, James R., Thompson, Ross M., Kefford, Ben J., Dyer, Fiona J., and Mac Nally, Ralph
- Subjects
- *
INVERTEBRATE communities , *ANTAGONISTIC fungi , *BIODIVERSITY , *RESERVOIRS , *INVERTEBRATES - Abstract
Abstract: Aim: Ecological models that do not account for interactions among stressors, if interactions are important, could be inaccurate and lead to inefficient conservation strategies. Conversely, if interactions are not important (i.e., stressors operate largely independently), then actions concentrating on a stressor‐by‐stressor basis would be warranted. Here, we investigated whether interactions among multiple stressors affected widely used indices of freshwater macroinvertebrate biodiversity, which are sensitive to environmental change at management‐relevant scales (i.e., reaches and catchments). Location: State of Victoria, south‐eastern Australia. Methods: We used a 7,418‐sample dataset for stream macroinvertebrates from 2,165 sites distributed over 237,630 km2 for 20 years. We calculated the interactive effects on stream macroinvertebrates of stressors operating at different scales, namely vegetation loss at the catchment and reach scales and hydrological change and salinization at the local scale. The importance of interactions among multiple stressors was assessed by comparing the cross‐validated predictive performance of models with and without multiple stressor interaction terms. Results: Cross‐validated models explained 31%–63% of the variation in the macroinvertebrate responses. The most important stressors were catchment vegetation loss (the proportion of remaining native vegetation cover) and salinity. The inclusion of interaction terms did not increase cross‐validated predictive performance, which indicates that there was little evidence that interactions among stressors were important for explaining variation in commonly used freshwater macroinvertebrate condition indices. Main conclusions: Interactions among vegetation, salinity and hydrological change stressors may not always be of importance for determining patterns of stream macroinvertebrate biodiversity, so that such interactions may not necessarily be critical considerations for catchment and reach scale management, at least if based on these or comparable condition indices. The mitigation of the impacts of vegetation loss, salinization and hydrological change stressors one‐by‐one probably is sufficient to guide conservation activities and might be advantageous if socio‐political contexts make it difficult to address interactions among stressors. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
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20. GENETIC ANALYSIS OF YIELD AND YIELD COMPONENTS IN Oryza sativa x Oryza sativa CROSS.
- Author
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KAMARA, N., ASANTE, M. D., AKROMAH, R., and KAMARA, C. S.
- Subjects
- *
RICE , *RICE yields , *EPISTASIS (Genetics) - Abstract
The number one goal of most rice improvement programmes around the world is breeding for high potential to take care of the increasing consumption of rice. The objective of this experiment was to study the inheritance of yield and yield components and to estimate the heritabilities of important quantitative traits in rice (Oryza sativa L.). Six generations viz., P1, P2, F1, F2, BCP1 and BCP2 of a cross between IET6279 and IR70445-146-3-3 were used for the study. Generation mean analysis suggested that additive effects had a major role for the expression of plant height, number of panicles, number of spikelets per panicle, percentage spikelets fertility per plant and grain yield per plant, which further suggested that phenotypic selection was possible at an early stage. Both additive and non-additive gene actions were important for the expression of number of fertile spikelets per panicle and 100-grain weight. Therefore, selection for these characters would be fruitful, if delayed till epistasis effects are reduced to a minimum. High broad sense heritability estimates were observed for characters viz. plant height and 100-grain weight, suggesting that the characters under study are less influenced by environment in their expression. Thus, selection based on phenotypic value of these characters would be reliable and effective. Low estimates of broad sense heritability were observed for number of panicles per plant, number of spikelets per panicle, number of fertile spikelets per panicle, percentage spikelets fertility per plant and grain yield per plant, indicating that influence of the environment was high for these characters. Therefore, superior genotypes selection based on phenotypic performance for these characters may not effective. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
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21. Estimation of genetic parameters and combining ability analysis in blackgram [Vigna mungo (L.) Hepper].
- Author
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Thamodharan, G., Ramalingam, A., and Geetha, S.
- Subjects
- *
BLACK gram , *PLANT genetics , *PLANT genes , *GENES , *ANGIOSPERM genetics - Abstract
An experiment was carried out in blackgram using line x tester mating design to estimate the gca effect of parents (six lines and five testers) and sca effect of 30 hybrids for yield and its traits. Estimates of gca and sca variances, degree of dominance, predictability ratio and narrow sense heritability revealed that only three trais viz, pods per plant, seeds per pod and single plant yield were controlled by additive gene action and hence showed high narrow sense heritability. Magnitude of non-additive gene action was higher than the additive gene action for traits like plant height, days to 50% flowering, cluster per plant, 100 seed weight, days to maturity, branches per plant and pod length. Three parents 'MDU1, ADT3 and LBG-752 were the best combiners and three crosses 'MDU 1 x VBN (Bg) 6, LBG-752 x VBN (Bg) 6, LBG-752 x Mash-114 showed high per se performance and significant positive sca for yield. For exploiting both additive and nonadditive gene action recurrent selection to be followed to improve yield in blackgram. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
- View/download PDF
22. Gene action in low nitrogen tolerance and implication on maize grain yield and associated traits of some tropical maize populations
- Author
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Ige Sunday, Obaniyi Kayode, Abolusoro Stephen, Ajiboye Babatunde, and Aremu Charity
- Subjects
0106 biological sciences ,additive ,Low nitrogen ,Agriculture (General) ,Agriculture ,04 agricultural and veterinary sciences ,Biology ,maize ,01 natural sciences ,S1-972 ,gene action ,Agronomy ,gca and sca ,040103 agronomy & agriculture ,0401 agriculture, forestry, and fisheries ,Grain yield ,General Agricultural and Biological Sciences ,Gene ,010606 plant biology & botany ,non-additive - Abstract
Understanding the mode of inheritance of traits is vital in the selection of breeding methods for the grain yield and improvement of associated traits in a target environment. Combining ability is one of the powerful indices for the selection of the best cross combinations, parental lines that combine with other lines and the best breeding method for high grain yield improvement programmes. A total of 45 crosses were generated from ten maize varieties developed in low nitrogen environment in a diallel mating fashion without reciprocal. The resultant progenies were investigated in low- and highnitrogen soil to identify the mode of grain yield inheritance and those of related traits in the tested environments. Mean square analysis revealed the preponderance of additive and non-additive gene actions in the expression of maize grain yield and related characters tested under stress and optimal conditions. In this study, it is proved that both standard selection and hybridization breeding strategies are effective for the improvement of most traits involved. This experiment also confirmed the adequacy of sufficient variation in the gene pool present in the maize population that could be exploited in maize grain yield improvement programmes in the tropics. The ratio of SCA to GCA however emphasized the superiority of additive gene effects in the expression of most traits in the tested environments. The results, therefore, suggest that additive gene actions primarily condition the expression of maize grain yield and associated characters in the tested environments. Therefore, suggesting that the standard selection method would be effective for the improvement of most traits tested under the two environments.
- Published
- 2020
23. Parallel multi-objective multi-robot coalition formation.
- Author
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Agarwal, Manoj, Agrawal, Nitin, Sharma, Shikhar, Vig, Lovekesh, and Kumar, Naveen
- Subjects
- *
PARALLEL computers , *ROBOTICS , *MATHEMATICAL optimization , *COMPUTATIONAL complexity , *CUDA (Computer architecture) - Abstract
In the quest for greater autonomy, there is an increasing need for solutions that would enable a large set of robots to coalesce and perform complicated multi-robot tasks. This problem, also known as the multi-robot coalition formation problem has been traditionally approached as a single objective optimization problem. However, robots in the real world have to optimize multiple conflicting criteria such as battery life, number of completed tasks, and distance traveled. Researchers have only recently addressed the robot coalition formation problem as a multi-objective optimization problem, however the proposed solutions have computational bottlenecks that make them unsuitable for real time robotic applications. In this paper we address the issue of scalability by proposing parallelized algorithms in the CUDA programming framework. NSGA-II and PAES algorithm have been parallelized due to their suitability to the coalition formation domain as outlined in our previous work. The parallelized versions of these algorithms have been applied to both the additive and non-additive coalition formation environments. Simulations have been performed in the player/stage environment to validate the applicability of our approach to real robot situations. Results establish that the multi-point PAES parallel variant yields significant performance gains in terms of running time and solution quality when the problem is scaled to deal with large inputs. This suggests that the algorithm may be viable for real time robotic applications. Experiments demonstrate significant speedup when the proposed parallel algorithms were compared with the serial solutions proposed earlier. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
24. Predictability of multispecies competitive interactions in three populations of Atlantic salmon Salmo salar.
- Author
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Houde, A. L. S., Wilson, C. C., and Neff, B. D.
- Subjects
- *
CLASSIFICATION of fish , *FISH populations , *COMPETITION (Biology) , *ATLANTIC salmon , *ECOLOGICAL niche , *CHINOOK salmon - Abstract
Juvenile Atlantic salmon Salmo salar from three allopatric populations ( LaHave, Sebago and Saint-Jean) were placed into artificial streams with combinations of four non-native salmonids: brown trout Salmo trutta, rainbow trout Oncorhynchus mykiss, Chinook salmon Oncorhynchus tshawytscha and coho salmon Oncorhynchus kisutch. Non-additive effects, as evidenced by lower performance than predicted from weighted summed two-species competition trials, were detected for S. salar fork length ( LF) and mass, but not for survival, condition factor or riffle use. These data support emerging theory on niche overlap and species richness as factors that can lead to non-additive competition effects. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
25. Generation Mean Effects, Heterosis and Heritabilities for Seedling, Adult and Physiological Salinity Tolerance in Spring Wheat (Triticum aestivum).
- Author
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Ali, Zulfiqar, Khan, Abdus Salam, Karim, Ihsan, Uzair, Muhammad, Mahmood, Tariq, Saeed, Tariq, Sarwar, Sehrish, Ghori, Nida, Nisar, Zunaira, Sarwat, Syeda Samara, Qayyum, Abdul, and Khan, Asif Ali
- Subjects
- *
HETEROSIS in plants , *SEEDLINGS , *HALOPHYTES , *GENETIC regulation in plants , *PLANT genetics , *WHEAT breeding - Abstract
Soil salinity among other abiotic stresses is a major threat to cultivated land. Breeding salt tolerant cultivars has always been thought to be an effective and cheaper way to overcome salinity problem. Salt tolerant and salt sensitive wheat accessions were hybridized to develop genetic material to investigate inheritance of salt tolerance based on early seedling, adult plant and physiological responses. Salt tolerance in low salinity appeared to be a complex polygenic trait. However, genetic models for most responses were poor fit in high salinity and suggested further investigations. Differences in gene expressions in different NaCl concentrations appeared to be due to different gene regulation or interaction and/or involvement of additional or hidden genes. Both additive and non-additive gene effects required to be considered while designing of breeding programme for improving salt tolerance in wheat and in the statistical model used to find QTL for the salt tolerance. This QTL couple with recurrent selection for specific combining ability of the 4WLRG/1-8 with an excellent cultivar of wheat appears to be a good salt tolerant breeding strategy. © 2014 Friends Science Publishers [ABSTRACT FROM AUTHOR]
- Published
- 2014
26. Study on Combining Ability and Heterosis of Yield and Its Components in Pepper (Capsicum annum, L.).
- Author
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Khalil, Mona. R. and Hatem, M. K.
- Subjects
- *
PEPPER genetics , *GENETIC research , *PLANT genetics , *DIALLEL crossing (Botany) , *HETEROSIS in plants , *FRUIT yield - Abstract
Six parental genotypes and their fifteen F1 hybrids in a diallel cross system, without reciprocals, were used in the present study to estimate heterosis percentage relative to both mid and better parents, potence ratios and combining ability (general and specific) for some characters in pepper (Capsicum annum, L.). The experiment was conducted at the Experimental Station Farm of Fac. Agric. Minufiya Univ., Shebin El Kom, Egypt, during two successive summer seasons of 2012 and 2013. The obtained results reflected generally that the mean squares for general (GCA) and specific (SCA) combining abilities were highly significant for all the studied traits, suggesting the presence of both additive and non-additive gene effects in the inheritance of the various studied characters. However, the high ratio of GCA: SCA mean squares showed that GCA effect was more important than SCA effect. The preponderance of GCA effects implied that these characters would respond favorably to direct selection. Estimates of GCA effects showed that the best combiner parents werer found to be those of P3 and P1 for early fruits number, P6 and P1 for early fruits weight, P3 and P2 for total yield as fruits number and weight, P1 for fruit diameter, P4 and P6 for fruit length, P6 and P1 for average fruit weight. For pericarp thickness and vitamin C content, the parental genotype P1 was the best combiner, while P2 for TSS content. Estimates of SCA effects showed that the F1 cross 1×6 reflected the highest value in all the studied traits. For heterotic effect, hybrid vigour was detected in many characters; i.e., early fruits yield, total yield, fruit length, vitamin C and total soluble solids contents. These results suggested that hybrid vigour is available for commercial production of sweet pepper hybrid, and that isolation of pure lines from the progenies of heterotic F1's is a possible way to enhance the fruits yield and fruit quality. [ABSTRACT FROM AUTHOR]
- Published
- 2014
27. Combining Ability in African Marigold (Tagetes erecta L.)
- Author
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Y C Gupta
- Subjects
Additive ,Non-Additive ,Gene Action ,GCA and SCA ,Plant culture ,SB1-1110 - Abstract
A line x tester crossing programme was done using male sterile lines and a set of 11 genetically diverse pollinators as testers. F1's along with parents were evaluated during winter and summer seasons. During the seasons, for plant height and flower size, additive gene action was higher compared to non-additive gene action, while for flowering days and stalk length, non-additive and non-additive gene actions played important role during both the seasons, indicating the usefulness of hybrids in marigold cultivation. Similarly, for flower number during winter and for plant spread during summer, both additive and non-additive gene action played significant role. For other traits, gene action was inconsistent during different seasons.
- Published
- 2009
- Full Text
- View/download PDF
28. Combining ability for yield and yield attributing characters in brinjal (Solanum melongena L.)
- Author
-
S.N. Saravaiya, V. Maheta, D.A. Patel, and K.M. Desai
- Subjects
additive ,Melongena ,biology ,Field experiment ,Randomized block design ,Soil Science ,Plant Science ,non-additive ,lcsh:Plant culture ,biology.organism_classification ,sca ,brinjal ,Horticulture ,Yield (wine) ,lcsh:SB1-1110 ,Solanum ,combining ability ,Agronomy and Crop Science ,Hybrid - Abstract
A field experiment was carried out with a view to estimate, combining ability and gene effects in brinjal ( Solanum melongena L.). The experimental material comprised of 37 genotypes including 8 parents, 28 hybrids and one standard check (Surati Ravaiya) was laid out in Randomized Block Design with three replications at Regional Horticultural Research Station (R.H.R.S.), Navsari Agricultural University, Navsari, Gujarat during Rabi 2015-16. Combining ability analysis revealed that both additive as well as non-additive gene effects were important in the inheritance of all the traits studied. However, magnitude of variances due to sca were comparatively larger than those of gca for most of the economic traits indicated preponderance of non-additive gene action. Among the parents, JBGR-1, NSR-1 and JBL-08-8 were good general combiners for majority of the traits. The crosses viz., AB-09-1 × AB-12-10, AB-09-1 × AB-08-5, AB-08-5 × JBL-08-8 and GJB-3 × AB-12-10 showed higher order sca effects in addition to performance for fruit yield and its component characters.
- Published
- 2017
29. Combining Ability in African Marigold (Tagetes erecta L.)
- Author
-
Gupta, Y C
- Subjects
additive ,gene action ,gca and sca ,Short Communications ,food and beverages ,Plant culture ,non-additive ,SB1-1110 - Abstract
A line x tester crossing programme was done using male sterile lines and a set of 11 genetically diverse pollinators as testers. F1's along with parents were evaluated during winter and summer seasons. During the seasons, for plant height and flower size, additive gene action was higher compared to non-additive gene action, while for flowering days and stalk length, non-additive and non-additive gene actions played important role during both the seasons, indicating the usefulness of hybrids in marigold cultivation. Similarly, for flower number during winter and for plant spread during summer, both additive and non-additive gene action played significant role. For other traits, gene action was inconsistent during different seasons.
- Published
- 2009
30. Combining ability studies for yield and yield components in chilli (Capsicum annuum L.)
- Author
-
K. Uma Krishna, L. Naram Naidu, C. Venkata Ramana, C. K. Koteswara Rao, M. Janaki, and J. Dilip Babu
- Subjects
additive ,Kharif crop ,Soil Science ,Plant Science ,Mating design ,lcsh:Plant culture ,Biology ,capsicum annuum ,Horticulture ,Capsicum annuum ,Yield (wine) ,lcsh:SB1-1110 ,combining ability ,Agronomy and Crop Science ,chilli ,non-additive ,Hybrid - Abstract
The present investigation was carried out at Horticultural Research Station, Lam farm, Guntur, Andhra Pradesh during kharif, 2013-14 and 2014-15 to estimate the combining ability effects employing the line x tester mating design with nine lines and six testers. The analysis of variance revealed that significant differences among the parents and crosses for all the 12 characters studied. Six characters viz. fruit yield per plant, plant spread, days to 50% flowering, days to fruit maturity, number of fruits per plant and number of seeds per fruit were exhibited higher magnitude of sca variances than gca variances which revealed that non-additive gene action was played an important role in the inheritance of these trait. According to gca effects, the genotypes LCA-442, LCA-654, LCA-655, LCA-703-2 and LCA-453 found to be promising general combiners for yield and yield components. The sca effects revealed that nine crosses viz., LCA 466 x LCA 705-2, LCA 607 x LCA 703-2, LCA 355 x LCA 678, LCA 504 x LCA 705-2, LCA 446 x LCA 703-2, LCA 615 x LCA 453, LCA 442 x LCA 453, LCA 607 x G4 and LCA 654 x LCA were identified as promising hybrids for fruit yield and it’s yield component characters.
- Published
- 2017
- Full Text
- View/download PDF
31. Combining ability for yield and different characters in brinjal (Solanum melongena L.)
- Author
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S.N. Saravaiya, K.M. Desai, and D.A. Patel
- Subjects
additive ,Melongena ,biology ,Soil Science ,Plant Science ,lcsh:Plant culture ,biology.organism_classification ,sca ,brinjal ,Horticulture ,Yield (chemistry) ,lcsh:SB1-1110 ,Solanum ,combining ability ,Agronomy and Crop Science ,non-additive - Abstract
A field experiment was carried out with a view to estimate, combining ability and gene effects in brinjal (Solanum melongena L.). The experimental material comprised of 37 genotypes including 8 parents, 28 hybrids and one standard check (Surati Ravaiya) was laid out in Randomized Block Design with three replications at Regional Horticultural Research Station (R.H.R.S.), Navsari Agricultural University, Navsari, Gujarat during Rabi 2015-16. Combining ability analysis revealed that both additive as well as non-additive gene effects were important in the inheritance of all the traits studied. However, magnitude of variances due to sca was comparatively larger than those of gca for most of the economic traits indicated preponderance of non-additive gene action. Among the parents, JBGR-1, NSR-1 and JBL-08-8 were good general combiners for majority of the traits. The crosses viz., AB-09-1 × AB-12-10, AB-09-1 × AB-08-5, AB-08-5 × JBL-08-8 and GJB-3 × AB-12-10 showed higher order sca effects in addition to performance for fruit yield and its component characters.
- Published
- 2017
- Full Text
- View/download PDF
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