ABSTRACT
A total of 39 Groundnut accessions were used in this research work. Analysis of variance revealed significant difference among genotypes for all the seven characters studied. The magnitude of PCV and GCV was moderate to high for dry podyield and kernal yield. High heritability was recorded for hundred kernal weight, dry podyield and kernal yield. High heritability combined with high genetic advance was recorded for dry pod yield and kernal yield indicating that these characters are controlled by additive gene effect and phenotypic selection of these characters would be effective for further breeding purpose.
ABSTRACT
Character association and path analysis between yield and its contributing traits were studied in 54 sesame genotypes. Analysis of variance revealed the existence of significant differences among genotypes for all characters studied. Seed yield was significant positively correlated with number of capsules per plant, number of seeds per capsule, test weight and plant height. Path coefficient analysis indicated that number of seeds per capsule, number of capsules per plant was important traits to be considered for realizing the improvement in yield.
ABSTRACT
Sixty four mid early group genotypes of rice were studied for genetic diversity for yield and yield contributing characters. Cluster analysis revealed sixty four genotypes were grouped into 11 clusters. The pattern of distribution of genotypes into different clusters was at random. Plant height contributed maximum towards genetic divergence followed by days to 50% flowering. The maximum inter cluster distance observed for between 4 and 7 (182.08) followed by cluster 1 and 4 (169.94). The genotypes from these clusters can be utilized in hybridization programme for improvement of rice.
ABSTRACT
The evaluation of phenotypic variability, heritability and genetic advance in germplasm collections is important for both plant breeders and germplasm curators to optimize the use of the variability available. A total of 50 sesame accessions were used in this research work. Analysis of variance revealed significant difference among genotypes for all the nine characters studied. The magnitude of PCV and GCV was moderate to high for seed yield per plant, number of capsules per plant and number of branches per plant. High heritability was recorded for days to maturity, days to 50% flowering, seed yield per plant, number of capsules per plant and number of branches per plant. High heritability combined with high genetic advance was recorded for seed yield per plant, number of capsules per plant and number of branches per plant indicating that these characters are controlled by additive gene effect and phenotypic selection of these characters would be effective for further breeding purpose.
ABSTRACT
Character association and path analysis between yield and its contributing traits were studied in 71 genotypes (15 parents, 54 hybrids and two checks) of sunflower. Analysis of variance revealed that existence of significant differences among genotypes for all the characters studied. Seed yield was significant positively correlated with number of filled seeds per head, head diameter, hundred seed weight, seed filling per cent and plant height. Path coefficient analysis indicated that highest direct effects on seed yield were observed in the traits, number of filled seeds per head and hundred seed weight and hence emphasis can be laid out on these traits during selection for further improvement in seed yield in sunflower.
ABSTRACT
In the present investigation F2 population of 36 crosses were studied to estimate the variability, heritability, and genetic advance and genetic advance as percentage of mean for agronomic and grain quality traits. The Genotypic Coefficient of Variation (GCV) and Phenotypic Coefficient of Variation (PCV) were low to moderate with low heritability and genetic advance for harvest index indicating that the character is highly influenced by non-additive genetic effects and thus the selection would be ineffective. The moderate heritability and genetic advance were recorded for grain quality characters viz., kernel length, kernel breadth and L/B ratio. Moreover phenotypic and genotypic coefficients of variances were low which indicated the presence of nonadditive gene action.
ABSTRACT
Genetic variability, character association and path analysis between yield and its contributing traits were studied in 49 Rice cultures. Analysis of variance revealed the existence of significant differences among genotypes for all characters studied. The magnitude of PCV and GCV was moderate to high for number of grains per panicle, test weight and grain yield. High heritability coupled with high genetic advance as per cent of mean was observed for test weight and grain yield indicating the role of additive gene in expressing these traits. Grain yield was significant positively correlated with number of grains per panicle, panicle length and test weight. Path coefficient analysis indicated that number of grains per panicle, test weight and productive tillers per square meter were essential traits to be considered for realizing the improvement in yield.
ABSTRACT
The D2 statistics is useful tool to assess genetic diversity among genotypes. It also provides qualitative measures of association between geographical and genetic diversity based on generalized distances. In the present study data on forty nine genotypes were subjected to D2 analysis, which revealed the presence of substantial amount of genetic variability among them. The pattern of distribution of genotypes into various clusters was random, suggesting that geographical and genetic diversity were not related. The experimental material was partitioned into eight clusters. Flag leaf area per plant contributed maximum towards genetic diversity followed by days to 50 per cent tasseling.