Heterosis for yield and associated traits in bread wheat [Triticum aestivum (L.) em. Theil.]

Abstract

The extent of heterosis depends on the magnitude of non-additive gene action and wide genetic diversity among parents. However, there are reports that in self-pollinated crops, crosses with high magnitude of additive x additive gene action effects give better segregants [1]. Heterosis over better parent may be useful in identifying true heterotic cross combinations but these crosses can be of practical utility if they show superiority over the standard/best cultivar. Therefore, present investigation has been undertaken with an aim to estimate the magnitude of heterosis over standard variety of wheat in normal as well as heat stress environment.