摘要： 以3个新近选育和16个生产上常用骨干系总计19个玉米自交系为材料,比较它们在数量性状和AFLPs上的遗传差异.结果表明,表型数量性状与AFLPs数据的两种聚类结果都与自交系系谱有较好的一致性,且AFLP的吻合程度较高,两种聚类结果都一致把19个自交系所组配的生产推广优势组合的双亲分在不同的组或亚组;其中新选系中的21-ES、A318与其他骨干系在数量性状与AFLPs上有较大差异,被单独聚为一类;各自交系间的数量性状和AFLPs的遗传距离与其F1的中亲优势值呈正相关.

关键词: 玉米自交系, AFLP, 遗传距离, 聚类分析, 杂种优势

Abstract: Total nineteen maize inbred lines including three new lines and sixteen elite lines were chosen and their genetic differentiation revealed by quantitative and AFLPs data were studied. The results show that cluster analysis were some consistent with their pedigree based on quantitative and AFLPs, but the AFLP was more compatible, all the parents of strong heterotic combination were divided into different group or sub-group;21-ES and A318 had much differentiation with other elite inbred lines on quantitative traits and AFLPs, so they were both classified into different two groups which included only one inbred line. The genetic distance based on the quantitative and AFLPs had a positive correlation with yield mid-parents heterosis of F1.

Key words: Maize, inbred line AFLP, Genetic distance, Cluster analysis, Heterosis

中图分类号: 

• S513.035.1