INHERITANCE BEHAVIOUR OF QUANTITATIVE TRAITS IN LINSEED ( LINSEED (Linum usitatissimum L.)

Abstract

Genetic components of variances were analysed to understand the nature of inheritance of important quantitative
trait in linseed using half diallel mating involving 10 parental lines their 45F1 and 45F2 progenies. Significant
values for additive (D) and dominance (H1, H2) genetic components of variance were observed for most of the
traits in both generations. However, non-additive dominance type of gene action was predominant. Additive
gene action was observed for all the traits except days to 50% flowering and plant height in both F1 and F2
generations. In the loci (H2<H1), majority of the traits showed unequal proportion of positive and negative
genes with asymmetrical distribution among parental genotypes (H2/4H1<0.25). Significance of both additive
and non-additive genetic variations suggested integrated breeding strategies with delayed selection for crop
improvement.