北方农业学报 ›› 2020, Vol. 48 ›› Issue (1): 1-6.doi: 10.12190/j.issn.2096-1197.2020.01.01

• 种质资源·作物遗传育种 •    下一篇

基于表型性状的藜麦种质资源遗传多样性分析

叶君1, 2, 吴晓华1, 李元清1, 崔国惠1, 王小兵1, 赵春芝3, 杨蕾3, 张三粉1, 张海斌1, 于美玲1   

  1. 1.内蒙古自治区农牧业科学院,内蒙古 呼和浩特 010031;
    2.河北农业大学,河北 保定 071001;
    3.巴彦淖尔市农牧业科学研究院,内蒙古 临河 015000
  • 收稿日期:2019-04-26 出版日期:2020-01-19 发布日期:2020-05-08
  • 通讯作者: 吴晓华(1963—),女,研究员,硕士,主要从事麦类作物育种与种质资源的研究工作。
  • 作者简介:叶君(1980-),男,助理研究员,博士,主要从事作物育种与栽培技术的研究工作。
  • 基金资助:
    内蒙古农牧业科技创新基金项目(2017CXJJN09)

Genetic diversity analysis of phenotypic traits in quinoa germplasm resources

YE Jun1, 2, WU Xiaohua1, LI Yuanqing1, CUI Guohui1, WANG Xiaobin1, ZHAO Chunzhi3, YANG Lei3, ZHANG Sanfen1, ZHANG Haibin1, YU Meiling1   

  1. 1.Inner Mongolia Academy of Agricultural & Animal Husbandry Sciences,Hohhot 010031,China;;
    2.Hebei Agricultural University,Baoding 071001,China;
    3.Bayannur Academy of Agricultural and Animal Sciences,Linhe 015000,China
  • Received:2019-04-26 Online:2020-01-19 Published:2020-05-08

摘要: 【目的】了解和掌握内蒙古引进藜麦种质资源的遗传多样性,加强藜麦种质资源高效利用并推进育种进程。【方法】 对从国内外收集的101份藜麦种质资源进行生育期、株高、茎粗、单株粒重、千粒重、蛋白质含量和赖氨酸含量等表型性状的遗传多样性分析。【结果】 藜麦各表型性状的变异系数存在较大差异,其中,单株粒重变异系数最大,为36.0%;生育期的变异系数最小,为5.2%。各表型性状的多样性指数变化为1.960~2.085,其中,千粒重的多样性指数最大,为2.085;株高的多样性指数最小,为1.960。通过表型性状间的相关性分析可知,单株粒重与蛋白质含量、赖氨酸含量呈现不同程度的显著负相关关系(-0.36与-0.32)。通过聚类分析,将101份藜麦种质资源划分为4大类群,其中,第Ⅰ类群包含29份材料、第Ⅱ类群包含30份材料、第Ⅲ类群包含18份材料、第Ⅳ类群包含24份材料。【结论】 在藜麦新品种选育过程中,有必要关注藜麦籽粒产量与营养品质协同提高的问题。

关键词: 藜麦, 种质资源, 表型性状, 遗传多样性

Abstract: 【Objective】 In order to understand the genetic diversity basis of quinoa germplasm resources,improve the efficient use of germplasm resources,and promote the breeding process. 【Methods】101 quinoa germplasm resources were collected at home and abroad for determination of phenotypic traits and analysis of genetic diversity. Phenotypic traits included growth period,plant height,stalk diameter,kernel weight per plant,thousand kernel weight,protein content,lysine content,etc. 【Results】The coefficient of variation of each phenotype was significantly different. The largest one was coefficient of variation of grain weight per plant,which was 36.0%,and the smallest one was growth period,which was 5.2%. The range of phenotypic traits genetic diversity index was 1.960-2.085. Among all the genetic diversity indexes,the largest one was growth period,which was 2.085,and the smallest one was kernel weight per plant,which was 1.960. Through the correlation analysis of phenotypic traits,it showed different degrees of significant negative correlation (-0.36 and -0.32) between the grain weight per plant and the content of protein or lysine. Cluster analysis was grouped 101 quinoa germplasm accessions into four clusters. Among them,the first group contains 29 accessions of material,the second groups includs 30 copies of materials,the third group includs 18 copies of material,and the fourth group contains 24 copies of material. 【Conclusion】It is necessary to pay attention to improving both grain yield and nutritional quality at the same time in quinoa breeding.

Key words: Quinoa, Germplasm resources, Phenotypic traits, Genetic diversity

中图分类号: 

  • S519