生物技术通报 ›› 2018, Vol. 34 ›› Issue (7): 138-146.doi: 10.13560/j.cnki.biotech.bull.1985.2017-1070

• 研究报告 • 上一篇    下一篇

棉花SSR标记种质资源纯度鉴定及遗传多样性分析

石建斌, 周红, 王宁, 许庆华, 乔文青, 严根土   

  1. 中国农业科学院棉花研究所 棉花生物学国家重点实验室,安阳 455000
  • 收稿日期:2017-09-27 出版日期:2018-07-26 发布日期:2018-08-01
  • 作者简介:石建斌,助理研究员,研究方向:棉花遗传育种;E-mail:shijanbin@163.com;周红同为本文第一作者
  • 基金资助:
    中央级公益性科研院所基本科研业务费专项(161016201707),棉花生物学国家重点实验室自主课题(CB2017C14),河南省棉花产业技术体系(S2013-07-G01)

Purity Identification and Genetic Diversity Analysis of Cotton Germplasm Resources Using SSR Markers

SHI Jian-bin, ZHOU Hong, WANG Ning, XU Qing-hua, QIAO Wen-qing, YAN Gen-tu   

  1. Institute of Cotton Research of Chinese Academy of Agricultural Sciences,State Key Laboratory of Cotton Biology,Anyang 455000
  • Received:2017-09-27 Published:2018-07-26 Online:2018-08-01

摘要: 采用前期筛选出的26对SSR核心引物,对收集保存的58份棉花种质资源进行纯度检测和遗传多样性分析。结果显示,供试材料的纯度概率介于20%-90%,分子标记检测结果与田间表型相吻合,说明SSR纯度检测的准确度较高,可以作为进行快速检测棉花种质资源纯度的方法。共扩增出85种多态性基因型,每个标记检测到的基因型数在2-5,平均为3.27个,引物多态性信息量(PIC)介于0.073 7-0.928 1,平均为0.363 9。并利用NTsys-pc 2.10软件进行聚类分析,结果表明,58份种质资源的遗传相似系数(GS)变化范围为0.305 1-0.898 3,变幅为0.593 2,在GS=0.63水平上,将供试材料分为5大类,且这些资源材料的DNA聚类与其地理生态来源无关,而与材料的亲缘关系相关性较高,其聚类结果能更真实地反映种质资源间的遗传差异。

关键词: 棉花, 种质资源, 纯度鉴定, 遗传多样性, 聚类分析

Abstract: The purity and genetic diversity of 58 cotton germplasm resources were analyzed with 26 core SSR polymorphic markers screened in previous studies. The results showed that the purity of different materials was between 20%-90%,and the detection result of molecular marker was conformity with the phenotype in field,indicating that the accuracy of SSR detection was high and it can be used as a method for rapid detecting the purity of cotton germplasm. A total of 85 polymorphic genotypes were obtained,and the number of genotypes detected by each marker was between 2 and 5,with an average of 3.27. The primer polymorphism information content was between 0.073 7-0.928 1,with an average of 0.363 9. NTSYS-pc2.10 software was used to analyze the genetic diversity of 58 cotton germplasm resources,the results showed that the genetic similarity coefficient ranged from 0.305 1 to 0.898 3,the amplitude of variation was 0.593 2. The 58 materials can be divided into 5 major categories based on 0.63 GS level,and the variety resources of DNA clustering showed no correlation with their geographic ecological source,but a high correlation with genetic relationships of the materials. The clustering result can more truly reflect the genetic differences between the varieties.

Key words: cotton, germplasm resources, identification of purity, genetic diversity, clustering analysis