Year: 2017 | Month: April | Volume 10 | Issue 2
Genetic Variability Study for Yield and Yield Components in Rice (Oryza sativa L.)
Abstract:
Sixty five rice germplasms were evaluated for variability, heritability, genetic advance, correlation coefficient and path correlation in different yield and yield contributing traits. The data was recorded on five randomly selected plants for eleven quantitative characters. The analysis of variance revealed significant differences for the characters under study, indicating the presence of high genetic variability among the genotypes. The estimates of GCV were lower than the respective PCV, indicating the influence of environmental factors on the expression of the traits studied. Characters like days to maturity, days to 50% flowering and panicle weight showed high heritability coupled with moderate genetic advance as percent of mean, suggesting that selection for the improvement of these characters may be rewarding. Grain yield had high positive and significant association with panicle weight, filled grains per panicle, total grains per panicle and panicle length. Path coefficient analysis showed maximum direct contribution towards grain yield per plant with panicle weight followed by numbers of effective tillers per plant.
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