National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
The present study was undertaken with the objective to determine the nature and magnitude of genetic variability, degree of association between yield and its component characters and their direct, indirect effects on grain yield in F7 generation of aromatic rice. The present experiment was carried out with fifty-five aromatic rice genotypes which were evaluated in randomized block design with three replications at Rice section farm, Agricultural Research Station, Rajendranagar, Hyderabad during Kharif, 2011. The results showed that sufficient amount of genetic variability was found among the genotypes for all the traits studied. Higher magnitude of genotypic and phenotypic coefficient of variation was recorded for number of productive tillers per hill, number of filled grains per panicle, 1000-grain weight, grain yield per plant, kernel length and L/B ratio indicates that these are least influence by environment. High heritability coupled with genetic advance as percent of mean was registered for plant height, number of productive tillers per plant, panicle length, number of filled grains per panicle, 1000-grain weight, grain yield per plant, kernel length and L/B ratio, suggesting preponderance of additive gene action in the expression of these traits. Correlation studies revealed positive significant correlation of grain yield per plant with panicle length, filled grains per panicle, 1000-grain weight, kernel length and L/B ratio at both the levels and number of productive tillers per hill at phenotypic level indicating these characters were important for yield improvement. Path coefficient analysis revealed that kernel length exerted the highest direct effect on grain yield followed by number of filled grains per panicle, 1000-grain weight, number of productive tillers per hill and plant height indicating the selection for these characters is likely to bring about on overall improvement in single plant yield directly.
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