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 |
Distribution pattern of segregants and heritability estimates in paddy (Oryza sativa L.) crop for 12 quantitative traits in two F2 populations derived from the cross AD 16019 x ADT43 and AD16019 x WGL 14377 was studied at TRRI, Aduthurai during 2016-18. Platykurtic symmetrical curve for the traits with positive skewness was registered for the traits 1000 grain weight and single plant yield. The traits have also manifested high heritability estimates with low or medium genetic advance as percent of gain. Number of filled grain, grain length and Alkali spreading value were observed to have positive skewness in distribution and platykurtic kurtosis in both the F2 population. Days to flowering, number of filled grains/panicle, grain length, L/B ratio and gelatinization temperature are found to be are positively skewed with mostly platykurtic distribution. Hence intense selection at early cycle will improve the traits flowering, filled grains per panicle and grain length and biparental mating can be adopted to obtain extreme genotypes. For the traits 1000 grain weight and single plant yield selection may be done at later stages of segregating generation for more genetic gain. The breeding strategy would be development of hybrids (heterosis) or biparental mating to create more variability and selection.
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