Search

A study was carried out to assess character association and genetic diversity among green gram genotypes. The results of correlation coefficient analysis revealed a significantly positive correlation for the traits viz., plant height, number of primary branches, number of clusters per plant, pod length, and number of seeds per pod with single plant yield. The path analysis revealed that the number of pods per plant, number of seeds per pod, and hundred seed weight had the highest positive direct contribution to single plant yield. Pod length showed a low indirect contribution to the total variance and all other traits showed a negative contribution to total variance. [ABSTRACT FROM AUTHOR]

The present study was focused on evaluating the F3 population of VBN 11 x LBG 17 based on 10 yield components and the per cent disease index (PDI) for powdery mildew. Variability, correlation, and path analyses were performed to examine the data. The F3 population exhibited a wide range of variation for both yield components and PDI. Notably, the number of branches per plant, PDI, and seed yield per plant (g) showed high phenotypic and genotypic coefficients of variation. Furthermore, PDI alone displayed high heritability along with a high genetic advance as a percentage of mean. Moderate heritability and high genetic advance as a percentage of mean were observed for plant height (cm), number of branches per plant, total number of pods per plant, and seed yield per plant (g). These findings suggest that these traits are influenced by additive gene action and are suitable for effective selection. Correlation analysis revealed that all traits, except PDI and 100-seed weight, were significantly associated with seed yield per plant (g). Path analysis indicated that the total number of pods per plant had a substantial direct effect. Consequently, the total number of pods per plant can serve as a selection index for yield improvement programs. Notably, PDI exhibited no association with seed yield per plant (g), suggesting that resistant genotypes can be developed without any adverse correlation among yield components. [ABSTRACT FROM AUTHOR]

Little millet (Panicum sumatrense L.) is one of the neglected crops which is becoming popular as nutri-cereal. Development of high yielding stable cultivars may offer better economic return from this crop. Assessment of interrelationship among important economic traits helps to identify major yield component traits which could be selected for overall yield improvement hence development of superior genotypes. In this context, 50 genotypes of little millet were evaluated during kharif 2021, to identify important yield component traits through correlation and path analysis of 16 quantitative traits. Estimates of genotypic correlation coefficients were found to be higher than the estimates of phenotypic correlation coefficients, indicating that association were majorly under genetic control. It was revealed that direct selection based on fodder yield per plant, plant height and 1000 seed weight may help in augmenting grain yield in the experimental material, whereas, harvest index came out as the most important character for indirect selection. [ABSTRACT FROM AUTHOR]

A study was carried out to assess the genetic variability and association among yield attributing traits in 60 different safflower genotypes over six environments. The pooled analysis of variance (ANOVA) revealed that all attributes had a considerable degree of variation. The pooled analysis of variability parameters revealed that the phenotypic coefficients of variation (PCV) was higher than the genotypic coefficients of variation (GCV)for all of the characteristics evaluated, indicating that experimental variance contributed to total variation. Petal yield/plant and seed yield/plant had the highest PCV and GCV followed by number of capitula/plant, number of seeds/capitula, height of insertion of first branch, hundred seed weight, number of primary branches/plant, length of longest primary branches, number of secondary branches and height up to main capitula. Number of capitula/plant, seed yield/plant, petal yield/plant, height of insertion of first branch, number of seeds per capitula, hundred seed weight, number of primary branches/plant, length of the longest primary branches, number of secondary branches, height upto main capitula, capitulum diameter and plant height all had high heritability and genetic advance as percent of mean. Seedyield/plant showed positive, significant and directcorrelation with number of capitula/plant, number of seeds/capitulum, height up to the main capitulum, plant height, number of primary branches/plant, capitulum diameter, and hundred seed weight. Number of capitula/planthad the maximum direct effect on grain yield/plant followed by number of seeds/capitulum, hundred seed weight and petal yield/plant. Hence selection of these traits would improve seed and petal yield in safflower breeding program. [ABSTRACT FROM AUTHOR]

Eight parents and the 28 crosses of Indian Mustard (Brassica juncea (L.) Czern & Coss.) in two segregating generations, viz., F2 and F3 were studied for their genetic variability during the rabi seasons of 2020-21 and 2021-22, respectively. Observations were recorded for six morphological characters such as plant height (cm), primary branches per plant, secondary branches per plant, siliquae per plant, 1000 seed weight (g) and seed yield per plant (g). The PCV was found to be greater than the GCV and the difference between them was high in all the characters in both F2 and F3 generations. Most of the characters revealed a medium range of GCV and PCV. Moderate heritability was expressed by all the characters except primary branches per plant in F3 generation. The Genetic Advance as a percentage of Mean (GAM) was higher in most characters except in plant height. The character plant height was found to be positively correlated with seed yield per plant in both F2 and F3 generations, with secondary branches per plant in the F3 generation and negatively correlated with primary branches per plant in F3 generation. A high direct effect on seed yield per plant was exhibited by plant height and 1000 seed weight in both F2 and F3 generations and by Secondary branches per plant in the F2 generation and Siliquae per plant in the F3 generation. [ABSTRACT FROM AUTHOR]

Thirty-seven genotypes of coriander including six check varieties were analyzed for variability, correlation, path coefficients, and genetic divergence. Genotypes were grown in RBD with three replications and observations were recorded for 13 different quantitative traits. Secondary branches per plant and total oil content confirmed high values of GCV and PCV. Seeds per umbel, test weight, and total oil content exhibited high heritability along with high GA (% of mean). Both genotypically and phenotypically, seed yield per plant exhibited a positive and significant association with umbels per plant, umbellates per umbel, test weight, and harvest index. On seed yield per plant, umbels per plant reported the highest positive direct effect. Genetic diversity analysis grouped the 37 coriander genotypes into 6 different clusters with the maximum inter-cluster distance seen between clusters III and VI. Among the thirteen traits, test weight contributed largely to the total genetic divergence. [ABSTRACT FROM AUTHOR]

Fifty two genotypes of Indian bean were examined for the genetic variability parameters and trait correlation for 11 yield contributing traits in F5 progenies. Analysis revealed that these genotypes had a considerable level of diversity. The magnitude of GCV and PCV was high for seed yield per plant, which indicated the potential for selection based genetic enhancement. The GCV and PCV values were moderate for pod weight, pods width and pod length. High heritability along with high genetic advance as per cent mean was recorded for pod width, pod length, pod weight and seed yield per plant. The seed yield per plant had a significant positive correlation with pod weight, plant height, pod length, pod width and seeds per pod. The overall genotypic path analysis revealed that racemes per plant exhibited the highest positive direct effects on seed yield per plant followed by direct effects of pod length, pods per raceme, pod width and pod weight. Therefore, simple selection is advised for pod length, pod width and pod weight to boost the yield of the Indian bean. Based on mean values, the progenies W-19-26, W-19-22 and W-19-25 of GNIB-21 × GP-167 among all crosses had shown significantly higher seed yield over the check varieties GNIB-21 and GNIB-22 and hence identified as elite genotypes. [ABSTRACT FROM AUTHOR]

A field experiment was undertaken to evaluate the variability and performance of thirty horsegram genotypes collected from various regions of Kerala and outside for yield and yield attributing characters. Analysis of variance was carried out based on the recorded observations, and it showed significant differences among the 30 genotypes for all the fifteen characters studied. Most of the traits exhibited narrow differences between PCV and GCV except for seeds per pod, the number of primary branches per plant and yield per plant. Yield per plant was found to be significant and positively correlated to primary and the number of secondary branches per plant, nodes per plant, pod number per plant, seeds per pod and 100 seed weight both at phenotypic and genotypic levels. Path analysis revealed that pod number per plant, seeds per pod, nodes per plant, 100 seed weight and days to maturity were the major yield contributing characters owing to their favorable direct effect on yield per plant. Genetic diversity studies using Mahalanobis' D² statistics assembled the 30 genotypes into eight clusters. [ABSTRACT FROM AUTHOR]

One hundred upland cotton germplasm accessions were evaluated for eight traits to evaluate the per se performance, genetic variability, heritability, genetic advance as a per cent of mean, correlation and path analysis. The estimation of variability indicated that the number of monopodia per plant had high GCV and PCV. High heritability along with high GAM was found in plant height, internode length, the number of monopodia per plant, the number of sympodia per plant, the number of bolls per plant and seed cotton yield per plant which suggested that additive gene activity had a significant influence in the inheritance of these traits. Correlation analysis showed that the number of sympodia per plant, the number of bolls per plant and boll weight have a significant high positive correlation on the seed cotton yield. Path analysis showed that the number of bolls per plant and boll weight had the highest positive direct effect on seed cotton yield per plant. [ABSTRACT FROM AUTHOR]

The experiment was carried out to determine the genetic variability parameters and character associations for eleven quantitative traits in Indian bean genotypes. It revealed a significant amount of variability present among these genotypes. Seed yield per plant had high Genotypic coefficient of variation (GCV) and Phenotypic coefficient of variation (PCV) values, showing the potential for improvement by selection. Racemes per plant, pods per raceme, pods per plant, and pod weight had moderate GCV and PCV values. There was high heritability combined with a high genetic advance for pod weight and seed yield per plant. Plant height, pods per plant, and pod weight were significantly and positively associated with seed yield per plant. Pods per plant had the most positive direct effect on seed yield per plant, followed by racemes per plant, plant height, pod weight, pod length, and seeds per pod. Therefore, selection for such traits is advised to bring about improvement in Indian beans. [ABSTRACT FROM AUTHOR]

The current experiment consisting of 19 elite safflower genotypes along with three checks (A-1, PBNS-12 and DSH 185) were sown in randomized block design in three replications. Genotypic correlation studies established a positive association between the number of capitulum per plant, the number of seeds per plant, the weight of 100 seeds per plant and the seed yield per plant. As a result, selecting genotypes based on these traits may help to enhance seed yield. Days to maturity and the number of seeds per capitulum had a positive association with oil content, indicating that delayed maturity contributed to enhance oil content. Similarly, the number of seeds/capitulum contributed to improve the oil content. Days to 50% flowering, number of capitulum /plant, number of seeds /capitulum, 100 seed weight and oil percentage appeared to have the most direct effects on seed yield. Oil content per plant had a significant effect on traits such as days to 50% flowering, days to maturity, and 100 seed weight, whereas seed yield had a negative direct effect towards oil content. The path analysis results showed that increased rosette period helped plants establishing good root system at an early stage of growth, delayed days to 50% flowering and maturity strongly affecting the source and sink, which converted into the number of capitulum per plant and 100 seed weight. These characters showed a positive relationship as well as direct effects on seed yield and oil content. As a result, a plant with delayed maturity (130-135 days), medium plant height (110cm), 30-35 seeds per capitulum, 100 seed weight (4.5-5 g) and oil content (32-33 %) would be considered as the model plant type for late sown irrigated conditions in Chhattisgarh plain. [ABSTRACT FROM AUTHOR]

The present study was carried out in a set of germplasm accessions for yield related traits in Chia. Results of the correlation coefficient revealed a highly significant and positive effect of the number of primary branches, harvest index and oil content on seed yield per plant on both genotypic and phenotypic levels, while plant height had a positive significant correlation with seed yield only at the genotypic level. Through analysis of path coefficients, the positive and significant direct effect of harvest index on genotypic as well as phenotypic levels was inferred, whilst days to 50% flowering and plant height illustrated positive direct effects on seed yield per plant only at the genotypic level. Moderate direct and positive effects of days to maturity at the genotypic level along with the number of primary branches at the phenotypic level were observed on seed yield per plant. The study revealed that harvesting index, days to 50% flowering and fruiting branches could be used as selection criteria traits, which will be very useful in future breeding programmes to enhance yield in Chia. [ABSTRACT FROM AUTHOR]

The experiment was conducted at sodic soils to determine the relationship and degree of direct and indirect effects of yield and yield contributing traits in 57 cowpea accessions along with checks CO (CP) 7, VBN 1 and VBN 3. The association analysis showed that clusters number per plant, pod numbers per cluster, length of the pod, seeds per pod and hundred seed weight were positively correlated with seed yield. Path analysis indicated that the number of clusters per plant revealed a highly positive direct effect on single plant yield at genotypic level followed by pod length, pods number per cluster and seeds per pod. Principal Component Analysis (PCA) revealed first four PCs together contributed 67.33 per cent of variability. A total of 12 genotypes occupied the first quadrant showed better performance for five characters namely 100 seed weight, seed yield per plant, the number of clusters per plant, the number of pods per cluster and plant height. These selected genotypes namely IC 201075, EC 101989, EC 724750, EC 725166, CO 7, EC 724707, EC 121879, EC 101940, EC 101913, EC 724767, EC 107181 and EC 101928 could be used as donors or elite genotypes in cowpea yield improvement programmes. [ABSTRACT FROM AUTHOR]

The present study was carried out in the F2 population of the cross OMT 21 A x JLSC 96 of sesame with the objective to assess the genetic variability, character association of yield and yield related traits in sesame. Experimental materials were raised during Kharif season of 2019 at Tamil Nadu Agricultural University, Coimbatore. Seven biometrical traits viz., days to first flowering, plant height, the number of branches per plant, the number of capsules per plant, the number of seeds per capsule, 1000 seed weight and yield per plant were recorded. The magnitude of PCV and GCV values were higher for the traits yield per plant, the number of branches per plant and the number of capsules per plant. The traits number of branches per plant and 1000 seed weight exhibited a high heritability along with a high genetic advance as per cent of mean. Yield per plant had a significant positive correlation with the number of capsules per plant followed by 1000 seed weight, plant height and the number of branches per plant. Path analysis revealed that the number of capsules per plant had a high positive direct effect on yield per plant. So, the selection based on these traits such as number of capsules per plant, plant height, 1000 seed weight and the number of branches per plant would be advantageous for crop improvement. [ABSTRACT FROM AUTHOR]

An experiment was carried out to estimate the genetic parameters such as variability, heritability, genetic advance, character association and path analysis for twelve quantitative characters in 50 genotypes of green gram [Vigna radiata (L.) Wilczek]. The GCV for all the characters studied was less than the PCV indicating the interaction of genotype with the environment. High heritability coupled with high genetic advance as per cent of mean was observed for the number of primary branches per plant, seed yield per plant, plant height, the number of pods per plant, 100 seed weight and days to 50 per cent flowering. Character association studies revealed that the number of pods per plant, the number of clusters per plant, the number of seeds per pod, the number of primary branches per plant, plant height, days to maturity, pod length and 100 seed weight showed a positive and significant correlation with seed yield per plant. Path analysis revealed that the number of pods per plant had a high positive and direct effect on seed yield. [ABSTRACT FROM AUTHOR]

In a study carried out with 71 genotypes of Indian mustard under sub-Himalayan condition during rabi 2017-18, it was found that all the genotypes differed significantly for yield and its attributing traits. Both GCV and PCV were found to be higher for height up to first fruiting branch, aphid count and penetration force indicating high variability in the genotypes. High heritability along with high genetic advance was observed for height up to first fruiting branch, primary branches per plant, secondary branches per plant, siliquae per plant and 1000 seed weight. The trait association study revealed that secondary branches per plant and siliquae per plant had positive significant association with seed yield per plant. Path coefficient analysis indicated that penetration force exhibited the highest direct effect on seed yield. Siliquae per plant and secondary branches per plant exhibited high direct positive effect and positive association with seed yield per plant. On the basis of all the eleven traits taken together, the genotype PRD-2013-9 (rank-1) was the best. [ABSTRACT FROM AUTHOR]

The field experiment was carried out during Rabi season of the year 2016 - 2017 at Department of Plantation, Spices, Medicinal and Aromatic crops, College of Horticulture, UHS campus, GKVK, Bengaluru. Sixteen coriander (Coriandrum sativum L.) varieties were evaluated to estimate the association of seed yield with other traits. Seed yield per plant exhibited positive and significant correlation with plant height, number of primary branches per plant, dry weight of plant, number of umbels per plant, number of umbellets per umbel, number of seeds per umbellet, test weight and harvest index. The perusal of path analysis revealed that, number of primary branches per plant had a highest positive direct effect on seed yield per plant followed by number of umbellets per umbel. Therefore emphasis could be given for characters associated with yield while selecting for higher yield in coriander. [ABSTRACT FROM AUTHOR]

Highest genotypic coefficient of variation was recorded for number of secondary branches per plant. High genetic variation was found in length of siliqua, seed yield per plant, number of siliqua per plant and 1000 seed weight (g). Where number of secondary branches per plant, number of siliqua per plant, length of siliqua, 1000 seed weight (g), oil content and seed yield per plant possessing high G.C.V. and heritability. High estimates of genetic advance were observed for number of siliqua per plant. High heritability coupled with high genetic advance; it was inferred that additive gene action was in operation for control of length of siliqua, seed yield per plant, 1000 seed weight, number of secondary branches per plant and number of siliqua per plant. The genotypic correlation coefficients were higher than phenotypic and environmental correlation coefficients. This indicated that there is strong inherent association between the various characters studied. Number of siliqua per plant and number of seeds per siliqua were the major characters which had highest direct contribution towards yield per plant. [ABSTRACT FROM AUTHOR]