Vol. 9, Issue 12 (2020)

Author(s):
Oza Hely N, Vaddoria MA, Raval Lata J, Maru Denisha R and Hadvani Janaki K

Abstract:
Heterosis for seed yield and its components was studied in a set of line × tester crosses of nine lines and five testers. Analysis of variance revealed significant differences among the genotypes for all the characters, indicating the presence of sufficient variability in the experimental material for all the characters studied. Differences among parents were also found highly significant for days to 50 % flowering, number of capsules per leaf axil, number of seeds per capsule and seed yield per plant. The differences among hybrids were also found significant for all the characters suggesting the presence of sufficient diversity among hybrid themselves for all the characters. While, differences among the parents vs hybrids were also found significant for seven characters viz., days to 50 % flowering, days to maturity, plant height, height to first capsule, number of capsules per leaf axil, number of capsules per plant and 1000-seed weight. Heterosis was worked out over mid-parent, better parent and standard check variety, GT-6. The standard heterosis for seed yield per plant ranged from -60.61 to 42.60 %. The crosses AT-471 × GT-2, AT-472 × GT-3 and AT-483 × GT-3 were good heterotic combinations for seed yield per plant, which recorded 42.60, 33.06 and 17.96 % standard heterosis, respectively. The heterosis for seed yield per plant was associated with the heterosis expressed by its component characters.