【摘要】 本试验估算了亚麻F₂群体8个农艺性状的遗传力、遗传进度与类型有关,其结果是,F₂不同性状的遗传力和遗传进度不同。F₂不同性状的遗传力、遗传进度在不同杂交组合中各不相同,在同父异母和同母异父的组合中也有明显的差异,F₂相对遗传进度可作为双亲遗传差异的指标。选育油用型品种时,以选择株结实果数遗传进度快,而株高遗传进度慢的组合为好。选育纤用型品种时,F₂以选择株高、工艺长度遗传进度快,而全茎分枝数和单株结实果数遗传进度慢的组合为好。选育两用型品种时,F₂宜选择株高、工艺长度、有效分茎数、单株结实果数遗传进度适度的组合。更多还原

【Abstract】 It has been estimted the heredity the genetic advance, the phenotypic correlation related 8 agronomic characters in F2 colony of flax in this experiment. The results of estimation are as follows: The heredity, the genetic advance of various characteristies in F2 are different and in various eross combinations are different, too. The heredity and the genetic advance also have evident difference in the cross combinations of same male parent and different female parent, same female parent and different male parent. The relative genetic advance in F2 can serve as target of genetic difference in parents. If we want to breed the cultivars of crown flax, we should select the cross combinations for the fast genetic advance of number pod per plant, the slow genetic advance of plant height in F2. If we want to breed the cultivars of flax for fibre, we should select the cross combinations of the fast genetic advance of plant height, tecnoiogical length and slow genetic advance of number of branches of main stems and number of seeded pod per plant in F2. If we want to breed the dual purpose cultivars of flax, it is suitable to select the cross combinations of the medium genetic advance of plant height, technological lingth, number of effective stems, number of seeded pod per plant in F2.更多还原