Studies on combining ability and heterosis for yield and yield components in greengram (Vgina radiata (L.) Wilczek)

Studies on combining ability and heterosis for yield and yield components in greengram (Vgina radiata (L.) Wilczek)

2004

E01480

Combining ability and heterosis for eight quantitative characters were studied through line x tester analysis involving five lines and four testers. The combining ability analysis revealed that variances due to hybrids, lines, testers and line x tester interaction were significant for all eight characters studied. The ratio of additive and dominance genetic variance (sigma A2: sigma D2) indicated that preponderance of non additive type of gene action for all the traits except number of branches per plant. The parents VGG 77, MI 267, Vamban 2 and KM 2 were found to be the best general combiners for most of the characters. The crosses with high sca effects were identified for each character. The hybrids ML 682 x Vamban 2 and VGG 77 x Vamban 1 recorded significant stanard heterosis for all the traits except number of branches per palnt. Three hybrids viz. K 851 x Vamban 1, VGG 77 x Vamban 1 and VGG 77 x KM 2 can be exploited in recombination breeding. Four cross combinations viz. ML 682 x Vamban 2, VGG 77 x Vamban 1, VGG 80 x KM 2 and ML 267 x Vamban 2 can be utilised for heterosis breeding.

v.91(1-3):79-82, MADRAS AGRICULTURAL JOURNAL

Research > Published Articles