Gene action for yield and its components in wheat (Triticum aestivum L.)
Abstract
Generation means analysis involving twelve generations of two crosses of wheat (Triticum aestivum L.) was used to elucidate the inheritance of tillers per plant, grains per spike, 1000-grain weight and grain yield per plant. The grain yield per plant and tillers per plant were mostly governed by the dominance, dominance x domimmce and dominance x dominance x dominance type of gene effects with larger magnitude but were unexploitable due to duplicate type of gene action. 1000-grain weight was found to be under control of both additive and non-additive gene effects with inadequate trigenic epistasis. Simultaneous utilization of both additve and non-additive genetic effects can be achieved by intermating of segregants in early segregating generation.
