Heterosis and Combining ability Estimates in Partial Diallel Crosses of Bread Wheat (Triticum aestivum L.)
2015
Patel, Devidas | Moitra, P. K. | Shukla, R.S. | Singh, S.K.
Heterosis and combining ability analysis were studied in a partial diallel design of bread wheat. Analysis of variance revealed that mean squares due togenotypes, parents and F1 crosses, were highly significant for all studied characters. The mean squares due to both general (GCA) and specific (SCA) combining abilities were highly significant for all studied characters. This indicated that involvement of both additive and non additive gene action in the inheritance of these traits. The ratio of GCA/SCA being less than unity indicated that the dominance gene effects were more important for all traits, except grain yield/plant, number of tillers/plant and number of spikes/plant. On the basis of GCA effect parents LOK-1 for 4 traits, HD 2864 for 2 traits, MP 4010 for 2 traits and GW 273 for 1 trait were good general combiners. Significant heterosis over better parent and mid parent was observed for almost all the traits studied. The maximum heterosis over better parent and mid parent (153.44 and 163.05%) was observed in grain yield/plant for the cross LOK-1 X GW 273 respectively.
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