Vol. 6, Issue 6 (2018)
Genetic potential, variability, heritability and genetic advance of grain yield and its component traits in maize (Zea mays L.) inbreds
Author(s): Arunkumar B, Gangapp E, Ramesh S, Savithramma DL, Nagaraju N and Lokesha R
Abstract: Studies were carried out to estimate the extent of genetic variability among 422 maize (Zea mays L.) inbreds during summer 2012 and kharif 2012. Pooled analysis of variance revealed genotypes differed significantly for all the traits except shelling %. Mean sum of squares due to inbreds × season differed significantly for days to anthesis, days to silking, anthesis silking interval, ear length, ear circumference kernel rows ear-1 and fodder yield plant-1. Anthesis silking interval recorded larger variation as indicated by standardized range (3.43) and fodder yield plant1 (248.68) registered highest mean value. Estimates of PCV (78.84) and GCV (65.09) were highest for anthesis-silking interval. Days to anthesis, days to silking, ear length, ear circumference, kernel rows ear-1 and 100 grain weight recorded lower PCV and GCV estimates. Days to silking (0.88), days to anthesis (0.87) and kernel rows ear1 (0.72) registered higher estimates of heritability in broad sense. However, these traits recorded moderate values of genetic advance as Percent of mean (16.79, 16.63 and 21.95, respectively). Higher estimates of heritability in broad sense and GAM were reported for anthesis-silking interval, plant height, ear length, kernel row-1 and fodder yield plant-1. Whereas, shelling Percent recorded lower estimates of heritability in broad sense and GAM. Higher estimates of heritability in broad sense and lower GAM was reported for grain yield plant-1, indicated non-additive gene action and provides limited scope for improvement through selection.
Pages: 2015-2018 | 341 Views 55 Downloads
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How to cite this article:
Arunkumar B, Gangapp E, Ramesh S, Savithramma DL, Nagaraju N, Lokesha R. Genetic potential, variability, heritability and genetic advance of grain yield and its component traits in maize (Zea mays L.) inbreds. Int J Chem Stud 2018;6(6):2015-2018.
