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经过十多年的苧麻自交纯化研究,先后选育出了一批纯合自交系,摸索了苧麻自交纯化的有效选择方法。研究结果表明。因苧麻长期异交,杂合程度高,按亲本综合性状或多个表现型性状选择,难以纯合;按自交退化原理,选择生长势较弱的自交后代个体自交,能加快纯合进程,是一种可取的选择方法,但由于自交个体生长势弱、生活力低、生殖器官退化等原因难以连续自交;在自交各代中,先按亲本叶柄颜色、雌蕾颜色选择后代个体进行自交。其它性状能随之逐渐纯合。在本研究中,最快的自交纯化途径为:自交1—2代,按自交退化原理选生长势较弱的单株自交,从2—3代开始,按亲本叶柄颜色、雌蕾颜色选择单株自交,当这两个性状基本纯合时,同时选择其它性状占分离比例较大的表现型单株自交。
After more than ten years of self-purification ramie research, has bred a number of homozygous inbred lines, groping Ramie self-purification method of effective selection. Research indicates. Because ramie long-term outcrossing, high heterozygosity, according to the parents of multiple traits or multiple phenotypic traits selection, it is difficult to homozygous; According to the principle of self-degeneration, select the growth potential weaker offspring offspring self self, can speed up the homozygous Process is a preferable choice method. However, it is difficult to self-fertilize inbreds due to the weak growth potential, low viability and reproductive organ degeneration. In the selfed generations, Descendants self-self. Other traits can be gradually homozygous. In this study, the fastest way of self-purification: selfing 1-2 generations, selection by selfing degeneration weaker self-growth of plants, from 2-3 generations, according to the parent petiole color, female When the two traits are basically homozygous, the budding color is selected for selfing of the plants. At the same time, the self-crossings of other phenotypic traits that account for the larger percentage of segregation are selected.