Genetic analysis of yield and its contributing traits in brinjal (Solanum melongena L.)

The experiment was conducted with parent, 45 F1s and 45 F2s population developed through diallel excluding reciprocals along with 10 parents viz., Azad B-1, Type-3, KS-224, KS-235, DVR-8, Azad Kranti, KS-331, PPL, KS-503 and KS-504 in Randomized Block Design with three replications at the Research Farm of the Department of Vegetable Science, C.S. Azad University of Agriculture and Technology, Kalyanpur, Kanpur during kharif 2010. The observations were recorded on 5 randomly selected plants from each row for ten quantitative traits namely, days to flowering, height of plant, number of branches per plant, length of leaf, width of leaf, length of fruit, width of fruit and number of fruits per plant. Genetic component of variance showed significant value for additive component (D) which was significant for width of leaf, length of fruit, width of fruit, number of fruits per plant and weight per fruit on both the generation except days to flowering and plant height based on F1 and number of branches per plant based on F2 only.The dominance components (H) were also highly significant for all the characters under study in both the generations. The degree of dominance (H1/D)0.5 showed over dominance for all the characters in both the generations. The ratio of KD/KR showed presence of more dominant alleles for all the characters based on F1 and F2 generation, while less than unity in F2 generation only for days to flowering and length of fruit. Other characters showed more amount of successive alleles. The ratio of (h2/H2) showed more than two gene group for length of leaf and width of fruit in F1 and F2 generation, respectively. More than three gene groups for length of leaf and weight of brinjal fruit in F2 & F1 & F2 generation, respectively. More than five gene groups for width of leaf in F1, more than six gene groups for width of leaf in F2 generation and other characters showed at least one gene group with some modification for controlling the traits.