Comparison and heterosis utilization of F1 generation in strawberry conventional breeding.

Taking disease-susceptible Japanese strawberry variety Hongjia as female parent,6 varieties with stronger disease-resistance as male parent,we obtained 16 combinations through reciprocal crossing,and the heterosises of their F1 generations were compared.The results showed that the fruit firmness,flavor,disease resistance,fruit shape and mature period of strawberry had genetic trends with the male parent.The yields of Hongjia×Kamonuoshi and Hongjia×Wentana were the highest,which reached 64.18 and 59.71 t/ hm2,respectively,and these two combinations showed better traits,such as strong disease resistance and high quality.In addition,some problems in the conventional breeding of strawberry were pointed out.