摘要
采用覆盖20条染色体的68对多态性引物在120个大豆品种(系)[包括67个中国大豆品种(系)和53个引自美国的品种(系)]进行遗传多样性及亲缘关系分析。结果表明,120份大豆材料具有丰富的遗传多样性(N_(a)=1.9852,N_(e)=1.4343,H=0.2776,I=0.4361);中国大豆比美国引进大豆遗传多样性水平高;7个群体遗传多样性由高到低为,黄淮海地区组>引种资源组>热带亚热带地区组>长江流域地区组>北方春大豆组>西南山区组>鲜食大豆组;7个群体间总遗传多样度(H_(t))为0.2807,群体内遗传多样度(H_(s))为0.2361,群体间遗传分化系数(G_(st))为0.1589,基因流(N_(m))为2.6468,群体间存在中低度遗传分化,遗传变异主要存在于群体内部,群体间Nm较丰富;以群体和单个品种(系)为单位进行UPGMA聚类的结果基本一致,部分材料相互交错。大豆种质遗传多样性与地理来源具有一定相关性的同时,不同地区间存在丰富的基因交流;黄淮海地区、西南山区、热带亚热带地区和长江流域地区的大豆材料遗传距离较近;引进大豆、北方春大豆和鲜食大豆与其他群体遗传距离较远,可作为拓宽中国栽培大豆遗传背景的物质遗传基础。
Using 68 SSR markers covering 20 chromosomes, 120 soybean varieties(lines) including 67 Chinese soybean varieties(lines) and 53 introduced soybean varieties(lines) from America were used for genetic diversity and genetic relationship analysis. The results showed that the average values of the number of alleles(N_(a)), effective alleles(N_(e)), Nei’s gene diversity index(H), and Shannon’s information index(I) between the varieties(lines) were 1.9852, 1.4343, 0.2776, and 0.4361, respectively, indicating the genetic diversity of 120 soybean germplasms was high. Genetic diversity in Chinese soybeans was higher than introduced soybeans from America. The genetic diversity index order of the seven populations was Huang-Huai-Hai area group > introduction resource group > tropical and subtropical area group > Yangtze River area group > northern spring soybean group > southwest mountainous group > fresh soybean group. The total genetic diversity(H_(t)) among all seven populations was 0.2807 while the genetic diversity(H_(s)) within populations was 0.2361, the coefficient of genetic differentiation(G_(st)) among populations was 0.1589 and the gene flow(N_(m)) was 2.6468. Low-medium genetic differentiation was identified among populations while genetic variation mainly existed within each group and gene flow in seven populations was abundant. The results of UPGMA clustering analyses using different populations and individual varieties(lines) as the unit were basically the same and some materials were interlaced in different groups. While soybean germplasms had a certain correlation with geographic origin, there were abundant gene exchanges among different regions. The genetic distances were close between varieties(lines) from the Huang-Huai-Hai area, southwest mountainous areas, tropical and subtropical area, and the Yangtze River area. However, the genetic distance between the varieties(lines) from America, northern spring varieties(lines), and fresh soybean varieties(lines) were distant. In consequence, these materials
作者
李琼
常世豪
武婷婷
耿臻
杨青春
舒文涛
李金花
张东辉
张保亮
Li Qiong;Chang Shihao;Wu Tingting;Geng Zhen;Yang Qingchun;Shu Wentao;Li Jinhua;Zhang Donghui;Zhang Baoliang(Zhoukou Academy of Agricultural Sciences,Zhoukou 466001,Henan,China;Institute of Crop Sciences,Chinese Academy of Agricultural Sciences,Beijing 100081,China)
出处
《作物杂志》
北大核心
2021年第4期51-58,共8页
Crops
基金
河南省甘薯杂粮体系大豆岗位专家(S2020-14-G01)。
关键词
大豆
种质资源
遗传多样性
SSR
Soybean
Germplasm resources
Genetic diversity
SSR
