摘要
对３１个芝麻品种进行了主成分分析及遗传距离测定和聚类分析，结果表明，３１个品种可分为１４类，在类群间（Ｄ２≥１２．５０）组配组合是有效的，类群内组配不利于遗传多样性和优良变异材料的选育。地理远缘品种在遗传上不一定远缘，而近缘品种由于选择方向不同可能成为遗传远缘。
On the basis of the principal components analysis of 31 sesame varieties,11 were chosen as the parents in the crossing programme in accordance with the breeding experience.Further genetic distance estimation followed by cluster analysis indicated that:① the 31 varieties could be classified into 14 groups;② it was feasible to mate among the varieties belonging to different groups if their mean genetic distance value were higher than D2=12.50;③if mating within a group, it was unhelpful to the genetic diversity and the selection of the promising segregants in the offsprings. At the meantime we found that some varieties were classified into geograhpic distant groups but their genetic distances were ciose,and,some varieties whose pedigree were close had larger genetic distance due to the different selection criteria.
出处
《华北农学报》
CSCD
北大核心
1994年第3期29-33,共5页
Acta Agriculturae Boreali-Sinica
关键词
芝麻
主成分分析
遗传距离
杂交
Sesame
Principal components analysis
Genetic distance
Cluster analysis
Intervarietal cross
