Characterization and variability for important biometrical traits of newly developed male sterile lines of pearl millet [Pennisetum glaucum (L.) R. Br.]
AbstractThe present study on genetic variability, heritability and genetic advance for yield and yield contributing traits was conducted in 20 newly developed male sterile lines of pearl millet, developed at the Central Arid Zone Research Institute, Jodhpur, during the rainy season of the year 2013. Significant genetic variability among genotypes was observed for all the traits studied i.e. days to flowering, plant height, ear head length, ear head girth, effective tillers per plant, ear head number, ear head weight, grain yield, 500 grain weight and panicle harvest index. Mean performance of all traits revealed that ms lines CZMS 0021A and CZMS 0008A had higher manifestation of most of the desired traits. High values of genotypic coefficients of variation and phenotypic coefficient of variation were observed for traits like grain yield per plot, ear head weight per plot and effective tillers per plant, indicating that these traits contributed significantly to the total variability. High heritability estimates were observed for grain yield per plot, ear head weight per plot, plant height and days to flowering. High genetic advance as percentage, was recorded for grain yield per plot and ear head weight per plot. Greater magnitude of heritability coupled with higher genetic advance for grain yield per plot and ear head weight/plot revealed additive genetic effects for inheritance of these traits, while, high heritability estimates with low genetic advance indicated the presence of non-additive gene action for days to flowering, plant height and ear head length.
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