Studies on the heredity disciplinarian of cold hardiness of hybrids progenies of apples
[Objective]This project aims to screen out new apple varieties with strong cold hardiness by studying the heredity disciplinarian of cold hardiness in apple hybrid progenies,so as to lay a foundation for the development of coldhardiness breeding of apples in North Xinjiang.[Methods]The F1 generations hybrid progeny of Huahong × uanshuai,Guoguang × Huahong,Donglimeng × Huahong,and the F2 generations hybrid progeny of Chiyang × Xinhong(Huahong × Yuanshuai),Jinguan × Xinguang(Guoguang × Huahong),Jin-guan × Xindong(Donglimeng × Huahong),were used as test materials.The genetic tendency of cold hardiness in the first and second generations of apple hybrids,the offspring of recrossing between F1 generation and big apple,and the reciprocal hybrid combinations of small apple with cold resistance and big apple were investiga-ted.[Results]F1 has a cold resistance of 26.45％,and F2 is only 1.35％.The F2 generation has decreased by 25.1％compared the F1 generation.F2 generation has a higher mutation rate than F1 generation,among them,the combination of Jinguan x Xinguang(Guoguang x Huahong)has the highest variation rate.The order of the number of plants appearing at each level is level 4＞level 2＞level 3＞level 1＞level 0.[Conclusion]After the small cold resistance apples were hybridized with excellent big apples,the cold hardiness of filial genera-tion was affected greatly by small apples.Small apples had strong hereditary capacity.When F1 generation with strong cold hardiness was crossed with big apple,the cold resistance of F2 generation decreased significant-ly.When reciprocal cross between the big apples without cold hardiness and small apples with cold hardiness were carried out,the small apples with cold hardiness as female parents were significantly better than them as male parents.
万方数据
维普
