Genetic variability and the inheritance of plant height in wheat genotypes

Abstract

The inheritance of plant height in wheat (Triticum aestivum L.) was studied through the analysis of individual plants of parents and F₁, F₂ BC₁F₁ and BC₂F₁ generations in 14 crosses involving the tall genotype IAC5, the medium genotype IPF55244 and the short statured genotypes IPF55245, D8006, D8010 and D8017. The additive gene effects gave the highest contribution, though dominance showed importance in some crosses. The epistasis was detected on specific crosses. The parcial or complete dominance of the tallest parent over the shortest one in each cross was evident, except these involving the IPF55245 and D8017 genotypes. The results showed a large genetic variability among the genotypes studied and the following genetic constitution to them is suggested: IAC5=AABB; IPF55244=AAb₁b₁; IPF55245=aab₁b₁; D8006=a₁a₁bb; D8010=a₂a₂b₁b₁; D8017 = aab₁b₁.