Author(s):

B Somraj, RVSK Reddy, K Ravinder Reddy, P Saidaiah and M Thirupathi Reddy

Abstract: Generation mean analysis was studied among eighteen yield components and yield characters in the cross Arka Vikas x AVTO-9803 of tomato for five generations in Randomised Block Design replicated thrice during summer, 2017 at Vegetable Research Station, Agricultural Research Station, Rajendranagar, Hyderabad. The results revealed that The dominance (h) and dominance × dominance (l) had opposite sign for the traits root to shoot ratio, fruit set per cent, days to first fruit harvest, number of fruits per cluster, number fruits per plant, fruit length, fruit width, average fruit weight and fruit yield indicating the presence of duplicate dominance epistasis. The predominance of complimentary epistasis was noticed from similar signs of (h) and (l) for the expression of plant height, root length, number of primary branches per plant, days to 50% flowering, number of flowers per cluster, stigma exertion per cent, days to last fruit harvest and number of seeds per fruit indicating the presence of additive, dominance, additive × additive and dominance × dominance interaction effects were present along with either duplicate dominant epistasis or complementary epistasis for fruit yield and most of its contributing traits under high temperature conditions for the cross Arka Vikas x AVTO-9803.

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