甜高粱种质资源在新疆的多样性表现及聚类分析  

Genetic Diversity and Cluster Analysis of Sweet Sorghum Germplasm in Xinjiang

作　　者：冯国郡[1,2] 李宏琪[1] 叶凯[2] 李桂英[3] 涂振东[2] 郭建富[2] 

机构地区：[1]新疆农业大学农学院,乌鲁木齐830052 [2]新疆农业科学院,乌鲁木齐830091 [3]中国农业科学院作物科学研究所,北京100081

出　　处：《植物遗传资源学报》2012年第3期398-405,共8页Journal of Plant Genetic Resources

基　　金：新疆自然科学基金项目(2010211A60);现代高粱产业技术体系建设项目(nycytx-12)

摘　　要：采用多样性指数、变异系数和聚类分析等方法,对国内外72份甜高粱种质资源24个性状进行遗传多样性研究。结果表明,14个质量性状中粒色的遗传多样性指数最高为1.6333,幼苗色和结实形式的遗传多样性指数最低为0,平均为0.7460;10个数量性状中穗长、茎粗、锤度、单穗粒重、单株秆重、出汁率、千粒重、株高、穗重、生育期都存在较大的变异,变异系数幅度为7.85%～53.01%,各性状多样性指数均较大,平均2.0061;穗长的多样性指数最大,为2.1383,生育期多样性指数最小,为1.7331,表明新疆现有甜高粱资源拥有丰富的遗传多样性。聚类分析将72份资源划分为四大类。In order to efficiently use sweet sorghum germplasm in Xinjiang,this study analyzed and compared the genetic diversity of 24 main characters of 72 germplasms using genetic diversity indexes,coefficient of variation,and cluster analysis.The results showed that genetic diversity indexes（1.6333）was the highest for grain color among 14 qualitative characters,the lowest one was for in leaf color of seedling and seed setting form,and the average diversity indexes was 0.7460.The quantitative characters,such as main panicle length,stem diameter,brix,grain weight per spike,stem juice extraction,1000 grain weight,plant height,panicle weight,and whole growth period had greater coefficient of variability,ranging from 7.85% to 53.01%.All the quantitative character tested had great diversity indexes,ranging from 1.7331 to 2.1383 with an average of 2.0061.This showed that this collection of sweet sorghum germplasm had great genetic diversity.Cluster analysis showed that all 72 germplasms were divided into 4 groups.

关 键 词：甜高粱 遗传多样性 聚类分析 变异系数 

分 类 号：S566.5[农业科学—作物学]