定向育种法在纤维用亚麻亲本选配中的应用研究

本文结合14个亚麻品种的性状资料,提出了纤维用亚麻定向育种的方法。从考察的品种数量性状因子分析结果来看,第一主因子、第五主因子所对应的特征值决定性状是与长麻率有关的生长日数、营养生长前期、营养生长后期、株高、工艺长等性状,并进行了聚类分析,用以探讨以长麻率、株高、工艺长为目的的育种优势分析;第四主因子所对应的特征值决定性状是与产量有关的生长日数、长麻率等性状,并进行了聚类分析,用以探讨以产量为目的的育种优势分析;第二、第三主因子所对应的特征值决定性状是与抗倒伏有关的茎粗、抗倒伏等性状,并进行了聚类分析,用以探讨以抗倒伏为目的的育种优势分析;然后在大于各类间可能组合的平均遗传距离的聚类中选择具有优势的杂交组合。

A Method of Selecting Parental Lines for Directional Breeding Purposes

Genetic distance between cultivars were calculated based on principle components of multiple traits of 14 flax varieties.Parental lines were grouped according to the values of varieties provided a basis for selections of varieties for future crosses.It was shown in the paper that principle components can be analyzed separately information for directional breeding.The 14 flax varieties that were analyzed in the paper were grown.Results of the analysis clearly demonstrated the usefulness of the proposed method.