HETEROSIS WITHIN A VARIETY OF HUSK TOMATO (Physalis ixocarpa Brot.)

Abstract

In the present work a dialelic mating design was made with ten maternal half-sib families of the CHF1-Chapingo variety of husk tomato (Physalis ixocarpa Brot.). The families and their crosses were then evaluated. The objectives were to study the magnitude of the heterosis within this variety and to determine the relative importance of additive and non additive effects in yield and in another associated traits. The diallel crosses were made in the 1995 fall, and they were evaluated in two environments during the spring-summer cycle of 1996. The average heterosis of the hybrids was significant in average weight per fruit (6.65%) and in total yield per plant (4.32%), which indicates that some hybrids had larger expression than their parents in these traits. The additive affects were more important than the non additive ones. Just one hybrid produced more total yield per plant (4.51%) than the best family.