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中国农学通报

中国农学通报 ›› 2010, Vol. 26 ›› Issue (16): 309-314.

所属专题： 资源与环境； 油料作物； 园艺

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

西藏油菜野生种质资源植株形态遗传多样性分析

孟霞 卓嘎 旦巴 大次卓嘎 王建林   

  • 收稿日期:2010-03-23 修回日期:2010-05-19 出版日期:2010-08-20 发布日期:2010-08-20
  • 基金资助:
    国家自然基金

Analysis of genetic diversity of Tibet wild rape germplasms based on plant morphology

  • Received:2010-03-23 Revised:2010-05-19 Online:2010-08-20 Published:2010-08-20

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摘要： 对来自西藏拉萨、山南、日喀则、昌都等6个地区、38个县的50份油菜野生种质资源形态多样性进行分析，结果表明：西藏油菜野生种质资源形态多样性十分丰富，变异系数最高为72.04%，多样性指数最高达为0.9821；通过主成分分析，前6个主成分代表了西藏油菜野生种质资源形态多样性的85.19%，各主成分包含的形态性状具有一定的相关性，而且不同主成分之间差异较大；基于形态性状应用非加权配对法聚类，截距为1.61时可划分为5大类群，这五大类群的划分与株高、分枝数、角果数、分枝部位等性状关系密切。由此可见，西藏油菜野生种质资源存在极其显著的形态性状的遗传变异和丰富的多样性，丰富多样的种质资源为西藏油菜的研究利用提供了丰富的遗传基础。

关键词: 冬小麦, 冬小麦, 水分反应特性, 评价指标.

Abstract: Abstract:Morphologic diversity of fifty wild rape germplasms collected from Lhasa,Shannan,Rikaze,Chandou and thirty-eight counties in Tibet was analysized and abundant diversity was detected among them. The highest variability coefficient is 72.04% and diversity coefficient is 0.9821. The top six major components represent 85.19% morphologic diversity of wild rape germplasms in Tibet by analysis of major component. There is relativity to some extent as well as a significant diversity among morphologic traits of major components. Through unweighted-pair group method clustering based on morphologic traits, five groups can be classified as the intercept is 1.61, which is related to plant height, number of branches and siliques, and branching framework etc. The results indicate that there is significant genetic variance and abundant diversity about morphologic traits among Tibet wild rape germplams, which helps to unravel genetic basis of Tibet rape germplasm as well as to apply them.