INHERITANCE OF SOME QUANTITATIVE TRAITS IN STRAWBERRY
Two different models of forming experimental populations in half -sib and full-sib families have been used for comparative purposes. Hierarchical or nested cross system(type S/D and D/S) and factorial cross system SxD, including diallel design were used. Following two successive harvests 18 half-sib families were analysed including 87 full-sib progenies containing 3480 seedlings. The factorial design was found more useful than the hierarchical designs. Of the hierarchical designs, the model type S/D appeared to be better, due to a lower loading with maternal effects than the model D/S. Inheritance of strawberry quantitative traits depended primarily on the non-additive action of genes, probably epistasis effects. However, some slight effects of additive gene action were found in relation to the weight of fruits and yield, date of fruit ripening or even fruit firmness. Moreover, GCA and SCA evaluations in diallel analyses were made for the varieties examined.
Hortynski, J.A. (1989). INHERITANCE OF SOME QUANTITATIVE TRAITS IN STRAWBERRY. Acta Hortic. 265, 75-84