Study of Genetical Components Determining Vegetative, Flowering and Seed Parameters in Dogflower (Antirrhinum majus L.)

Abstract

Field experiment was conducted to elucidate the genetical components for
vegetative, flowering and seed characters following Vr-Wr graphical analysis. The study
was carried out in half diallel mating system excluding reciprocals involved 10 inbreds and
45 hybrids were developed by crossing inbreds in one direction. The F1s were evaluated
during 2016-17 and 2017-18 for some of the floricultural important traits. Additive and
dominant genetic components were found significant for plant height, number of primary
branches, leaf area index, days taken to flowering, diameter of spike, length of spike, days
taken to seed ripening, number of seeds/pod and weight of seeds/pod in both years except
number of leaves/plant. However, the dominant genetic component was more in magnitude
as compared to additive genetic component. It indicates that dominant genetic variance
was more important than additive genetic variance in determining all the characters except
number of leaves/plant.