Author(s):

Arunkumar B, Gangapp E, Ramesh S, Savithramma DL, Nagaraju N and Lokesha R

Abstract: An investigation was carried out to assess the genetic potentiality present among 422 maize inbred lines. Analysis of variance revealed, mean sum of squares for different sources of variation differed significantly for all traits indicating the existence of ample variability among the inbreds. Characters, fodder yield /plant at harvest (6145.00; 4279.36), grain yield / plant (2542.08; 1378.94) and number of leaves (1088.99; 1088.32) recorded higher values of phenotypic and genotypic variance, respectively, indicating the presence of sufficient inherent genetic variability for these characters. GCV was less than its corresponding estimates of PCV for all traits indicated the role of environment in the expression of these traits. Characters, anthesis silking interval (82.41; 65.58), number of leaves (236.66; 236.60), number of cobs / plant (36.01; 23.07), grain yield / plant (47.45; 34.95) and fodder yield / plant at harvest (40.90; 34.13) recorded highest estimates of PCV and GCV, respectively. Wide difference between PCV and GCV estimates were observed for all the traits. Higher estimates of heritability in broad sense were reported for anthesis (0.87), silking (0.89), cob length (0.79), cob girth (0.87), test weight (0.71), fodder yield / plant at harvest (0.70), anthesis silking interval (0.63), number of leaves (1.00), and number of kernel rows (0.63). Highest value of genetic advance as per cent of mean was recorded for number of leaves (487.22) followed by anthesis silking interval (107.51). High heritability coupled with low genetic advance was reported for silking, anthesis, anthesis silking interval, cob length, cob girth, number of kernel rows and test weight indicating the role of non additive gene action. High heritability coupled with high genetic advance was reported for number of leaves, plant height and fodder yield / plant at harvest indicating the role of additive gene action.

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