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 |
An investigation was carried out to study the frequency distribution, variability parameters and character association of traits in F2 populations of rice from the cross BPT-5204 x WAB 450 for grain yield and its component characters. In general, the PCV was higher than the GCV for all the traits and small differences between PCV and GCV were recorded for morphological traits studied which indicates less influence of environment on these characters. The high heritability was estimated for days to 50% flowering, plant height, flag leaf length, total number of tillers per plant, number of productive tillers per plant, grain yield per plant and straw yield per plant suggesting these traits are under higher genetic control. The traits viz., flag leaf length (23.12), total number of tillers per plant (49.64), number of productive tillers per plant (53.29), grain yield per plant (93.83) and straw yield per plant (88.66) had showed high heritability coupled with high genetic advance (as per cent of mean) indicating that these characters attributable to additive gene effects. Positive and significant association was manifested by traits viz., plant height (0.360), days to 50% flowering (0.308), panicle exsertion (0.218) and straw yield (0.992) on grain yield. However, it has negative correlation with panicle exsertion (-0.176), flag leaf length (-0.077) and number of un-productive tillers per plant (-0.017) with grain yield indicating that yield can be increased if selection is applied in favour of those yield components. Path coefficient analysis revealed that grain yield had direct effect or association from the traits viz., Days to 50% flowering (0.308), plant height (.360), panicle excertion (0.218) and straw yield per plant (0.992) and also indirect effect belonging to grain yield through flag leaf length and number of productive tillers per plant. The positively skewed and highly skewed was estimated in traits viz., panicle exsertion (1.07), total number of tillers per plant (1.16), total productive tillers per plant (1.12) and straw yield per plant (1.03) and all the traits were showed with platykurtic type of kurtosis except flag leaf length.
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