草地学报

›› 2005, Vol. 13 ›› Issue (3): 260-261.DOI: 10.11733/j.issn.1007-0435.2005.03.019

• 博士论文摘要 • 上一篇    下一篇

披碱草属(Elymus L.)植物遗传多样性研究

严学兵1,2, 周禾1, 王堃1   

  1. 1. 中国农业大学草地研究所, 北京, 100094;
    2. 郑州牧业工程高等专科学校, 河南郑州, 450008
  • 收稿日期:2005-06-24 修回日期:2005-07-26 出版日期:2005-08-15 发布日期:2005-08-15
  • 作者简介:严学兵(1974- ),男,博士,讲师,研究方向为草业科学,Email:yxbbjzz@163.com;周禾(1955- ),男,中国农业大学草地研究所教授,研究方向为草业科学;王堃(1962- ),男,中国农业大学草地研究所教授,研究方向为草业科学,E-mail:wangkun6060@sina.com.cn
  • 基金资助:
    青海省重大科技攻关项目“青南适用牧草品种选育(21031423)”资助

Study of Genetic Diversity of Elymus Species

YAN Xue-bing1,2, ZHOU He1, WANG Kun1   

  1. 1. Grassland Institute of China Agriculture University, Beijing 100094, China;
    2. Zhengzhou College of Animal Husbandry, Zhengzhou, Henan Province 450008, China
  • Received:2005-06-24 Revised:2005-07-26 Online:2005-08-15 Published:2005-08-15

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摘要： 以我国 9 种披碱草属(Elymus L. )的40个居群为材料, 采用形态学、等位酶和微卫星3 种标记对28个形态特征、7个等位酶位点和 11对SSR引物进行遗传多样性分析。结果表明:不同居群的披碱草间形态差异显著; 不同种、居群和形态特征变异规律也有所不同。旗叶与穗基部长度、生长速度( 幼苗-分蘖) 、小穗柄、植株绒毛分级在种内变异较大, 而穗的形状、穗节数、株高和内稃的变化较为稳定。聚类分析结果表明:披碱草(E.dahuricus Turcz.) 、圆柱披碱草(E.cylindri-cus( Franch.) Honda) 、紫芒披碱草(E. purpuraristatus C. P. Wang et H. L. Yang)变异很大, 垂穗披碱草(E.nutans Griseb L.)和老芒麦(E.sibiricus Linn.) 的居群按种归类比较清晰明显。

关键词: 披碱草, 形态特征, 等位酶, 微卫星, 遗传多样性

Abstract: The genetic diversities of 40 populations of 9 Elymus species from China were determined, using morphology, allozyme and microsatellite markers for 28 morphological traits, seven allozyme loci and eleven pairs of microsatellite primers. Morphological traits differed greatly among populations and variation trends also deviated within species and populations. The distance between the flag leaf and the spike of a plant, the growth rate during the seedling to the tillering stage, the rachilla and the plant villus grade varied species from species, though the spike shape, the spike pitch number, the plant height, and the palea changed unvaryingly. Dendrogram of relationships showed that, though E.dahuricus Turcz., E.cylindricus (Franch.)Honda, and E.purpuraristatus C. P. Wang et H. L. Yang varied to a great extent, populations of E.nutans Griseb.L., and E.sibiricus Linn. clearly clustered together within the species.

Key words: Elymus, Morphological trait, Allozyme, Microsattelite, Genetic diversity

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