论文部分内容阅读
通过不同类群毛白杨杂种、回交种28个无性系92株花粉和子房育性及杂种毛白杨自由授粉、二次回交结实、出苗和6叶期移栽前存苗的研究证明,毛白杨杂种不育和杂交后代夭亡严重。利用回交法可克服杂种不育和后代夭亡。二次回交使杂交后代结实、出苗和存苗基本正常。
A total of 92 pollen and ovary traits of 28 clones and free pollination of hybrid Populus tomentosa were obtained by backcrossing hybrids and secondary backcrossing seedlings. The results of seedling emergence at seedling stage and 6-leaf stage showed that Populus tomentosa hybrids Infertility and hybrid offspring premature death. Backcross method can be used to overcome hybrid sterility and offspring premature death. The second backcrosses made the progenies of hybrids strong, and the emergence and survival of seedlings were basically normal.