STUDIES ON THE TRENDS OF INHERITANCE OF COMMERCIAL CHARACTERISTICS OF CROSSED CHINESE PEAR PARENTS IN THEIR PROGENIES
Wang Yulin;Wei Windong;Li Xiugen (Zhengzhou Fruit Research Institute CAAS 450004)
Results of studied on 49 cross combinations and 2542 seedlings show under climatic conditions of Zhengzhou, Henan province, the juvenile stage of pear seedlings crossed between Pyres bretschneideri and P. pyrifolia varieties is about 4 to 5 years, depending mainly by the parental varieties used. When the seedlings grow up to 6 years old the percentage of flowering plants may be up to 70%. The inheritance of fruit size appeared to be under polygenic conyrol with the mean fruit size of the progeny being smaller than the parents. Generally the mean fruit weight of the progeny was smaller than the parents by 27%. But there were exceptions in a few combinations. The inheritance of fruit shape studied indicated that round and oblate shape may be dominant to pyriform andturbinate shape. The inheritance of skin color showed the green and yellow were dominant to the brown. As to the inheritance of flesh texture, it seems that the fine crisp and coarse Crisp texture were dominant to the fine tender crisp. But the latter might be appeared to be 30%. The results also indicated Yali, Mali and Korla s Xiangli were the best parents for breeding top eating quality varieties. Variety Jinhua has a strong trend to inherit its large fruit size.