摘要
基于玉米DUS测试指南中的39个基本性状,对100份黄淮海地区测试玉米自交系和9份代表自交系的遗传多样性和群体结构进行分析,为黄淮海地区玉米种质资源的高效利用、育种效率的提高提供理论依据。结果表明,109份玉米自交系各性状总体的平均等位变异数为5.026,变幅为1~9;平均有效等位变异数为2.919,变幅为1.000~6.053;平均Shannon指数为1.133,变幅为0.000~1.928。支持根显色强度(Chr.22)的遗传多样性最高,其次为花丝显色强度(Chr.9),第一叶顶端性状(Chr.1)遗传多样性最低,有48.72%的性状有效等位变异数大于2.919,61.54%的性状Shannon指数大于1.133。聚类分析结果表明,黄淮海地区玉米种质遗传背景相对较丰富,将109份材料聚成5类,除D类群包含9份自交系,数量最少外,其余4个类群包含自交系数量基本相同,D类群在其他各类群中遗传相似系数占比较少。各类群间的遗传距离介于0.200~0.665,其中,D类群与B类群的遗传距离最大(0.665),其次是D类群与C类群(0.586);C类群与B类群的遗传距离最小(0.200),其次是E类群与A类群(0.212)。
Based on the 39 basic characters in the DUS test guide of maize,the genetic diversity and population structure of 100 test inbred lines and 9 typical inbred lines were analyzed,so as to provide a theoretical basis for the efficient utilization of maize germplasm resources and the improvement of breeding efficiency in the Huang-Huai-Hai region.The results showed that the average allelic variation of all characters in 109 inbred lines was 5.026,with a range of 1—9;The mean effective allelic variation was 2.919,with a range of 1.000—6.053;The average Shannon index was 1.133,with a range of0.000—1.928.The diversity of supporting root color intensity(Chr.22)was the highest,followed by filament color intensity(Chr.9),and the diversity of top traits of the first leaf(Chr.1)was the lowest.The effective allelic variation of 48.72% characters was greater than 2.919,and the Shannon index of61.54% characters was greater than 1.133.The clustering analysis results indicated that the genetic background of maize germplasm in the Huang-Huai-Hai region was relatively rich.The 109 materials were clustered into 5 groups,except group D which contained 9 inbred lines with the smallest number,the other 4 groups had basically the same number of inbred lines,and group D had a relatively small proportion of genetic similarity coefficient in other groups.The genetic distance among the five groups varied from 0.200 to 0.665,the genetic distance between group D and group B was the greatest with0.665,followed by the genetic distance between group D and group C(0.586);The genetic distance between group C and group B was the smallest with 0.200,followed by the genetic distance between group E and group A(0.212).
作者
豆丹丹
孙建军
郭玉玺
王德新
郭新海
丁超明
DOU Dandan;SUN Jianjun;GUO Yuxi;WANG Dexin;GUO Xinhai;DING Chaoming(Institute of Food Crop Research,Henan Academy of Agricultural Sciences,Zhengzhou 450002,China)
出处
《河南农业科学》
北大核心
2023年第5期24-32,共9页
Journal of Henan Agricultural Sciences
基金
河南省农业科学院优秀青年科技基金项目(2022YQ15)
河南省农业科学院基本科研业务费项目(2023ZC16)。
关键词
玉米
自交系
遗传多样性
群体结构
DUS测试
黄淮海地区
Maize
Inbred line
Genetic diversity
Population structure
DUS test
Huang-Huai-Hai region
