草地学报

›› 2011, Vol. 19 ›› Issue (4): 668-673.DOI: 10.11733/j.issn.1007-0435.2011.04.022

• 研究论文 • 上一篇    下一篇

扁穗雀麦种质资源形态变异分析

郝峰1,2, 徐柱1, 闫伟红1, 李平1, 刘英3, 扈延成4   

  1. 1. 中国农业科学院草原研究所, 呼和浩特010010;中国农业科学院研究生院, 北京100018;
    2. 中国农业科学院草原研究所, 呼和浩特010010;
    3. 内蒙古河套灌域排水事业管理局, 临河015000;
    4. 内蒙古赤峰市草原工作站, 赤峰024000
  • 收稿日期:2010-12-16 修回日期:2011-04-25 出版日期:2011-08-15 发布日期:2011-08-15
  • 通讯作者: 徐柱,E-mail:yxuzhu@yahoo.Com
  • 作者简介:郝峰(1972- ),男,内蒙古巴彦淖尔市人,博士研究生,主要从事牧草种质资源与育种研究,E-mail:haofeng9480@163.com
  • 基金资助:
    中央级公益性科研院所基本科研业务费专项(中国农业科学院草原研究所)“八种优异禾草种质资源评价研究”(1610332011006);中央级公益性科研院所基本科研业务费专项(中国农业科学院草原研究所)“锡林郭勒典型草原生态生产功能区评价与适应性管理模式研究”(2010-Z-3);中央级公益性科研院所基本科研业务费专项(中国农业科学院草原研究所)“内蒙古太仆寺旗典型草原放牧管理优化模式研究”(1610332011019);中俄项目“优异作物基因资源收集、评价、利用与安全保存研究-中俄优异牧草遗传资源收集评价及其挖掘利用研究”(2008DFR30200)资助

Morphological Variations Analysis of Bromus catharticus Germplasm

HAO Feng1,2, XU Zhu1, YAN Wei-hong1, LI Ping1, LIU Ying3, HU Yan-cheng4   

  1. 1. Grassland Research Institute, CAAS, Huhhot, Inner mongolia 010010, China;
    2. Graduate school of CAAS, Beijing 100018, China;
    3. Hetao Drainage Management Department, Linhe, Inner mongolia 015000, China;
    4. grassland workstations in chifeng city, Chifeng, Inner mongolia 024000, China
  • Received:2010-12-16 Revised:2011-04-25 Online:2011-08-15 Published:2011-08-15

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摘要： 为了解不同草原生态区域扁穗雀麦(Bromus catharticus Vahl.)的形态变异及其亲缘关系,对17份种质材料的27个形态性状进行测定和分析。结果显示:其形态遗传变异较高,变异系数范围在9.13%～54.76%之间,变异系数较大的性状有小穗数、分蘖数、分枝着生小穗数、叶片长、秆直径、分枝长和株高等;变异系数较小的性状有穗节数、小穗轴节间长、小穗长、外稃长、内稃长、叶舌长、内稃宽、花药长、第二颖脉数、外稃宽等。叶片宽、分枝长、穗长、叶片长、秆直径、株高、小穗含小花数、小花数、小穗宽、花药长、小穗轴节间长等11个指标对总变异的贡献最大。并对27个性状进行了分类和性状间相关性聚类研究,17份材料聚类分析展示了不同材料间的亲缘关系。此形态变异研究为深入研究种质资源及育种提供了科学依据。

关键词: 扁穗雀麦, 变异, 形态学, 主成分, 聚类

Abstract: Morphology analysis is an easy and practical method to understand morphological variation and genetic relationship of materials.Phenotype analysis of 27 morphological traits shows that 17 Bromus tectorum Vahl.germplasm resources from different grassland ecology regions of China have significant genetic variations.Coefficient of variation was 9.13%～54.76%.There is broader variation in spikelet number,tiller number,spikelet number per branching,blade length,stalk diameter and branching length than other morphological traits among tested germplasm.There is less variation in spikelet joint number,rachilla internode length,spikelet length,lemma length,palea length,ligule length,palea breadth,anther length and lemma breadth among tested germplasm compared to other morphological traits.Blade breadth,branching length,blade length,stalk diameter,plant height,floret number per spikelet,floret number,spikelet breadth,anther length and lemma breadth were main factors of morphological variations.Cluster analysis indicates that 17 germplasm resources were classified into four groups according to the correlation of 27 morphological characters.These results not only reveal the genetic relationship of tested materials but also provide scientific basis for the further research of germplasm resources and breeding.

Key words: Bromus catharticus Vahl., Variation, Morphology, Principal components, Cluster

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