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

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.