| 蒙古冰草种质资源的遗传变异 |
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| 引用本文： | 解新明,卢小良,云锦凤.蒙古冰草种质资源的遗传变异[J].华南农业大学学报,2004,25(Z2). |
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| 作者姓名： | 解新明 卢小良 云锦凤 |
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| 作者单位： | 华南农业大学南方草业中心 内蒙古农业大学生态环境学院 广东 广州 广东 广州 内蒙古 呼和浩特 |
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| 基金项目： | 国家自然科学基金资助项目(39770535)
内蒙古自然科学基金资助项目(9610E42) |
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| 摘 要： | 对内蒙古中东部地区6个天然居群及内蒙沙芦草和蒙古冰草新品系2个栽培品种(系)的遗传多样性研究结果进行了综合评价,发现蒙古冰草具有极为丰富的遗传多样性,且居群内的遗传变异大于居群间,同时天然居群的遗传多样性也明显高于栽培品种(系);另外,两个栽培品种(系)间也存在有相当程度的遗传分化,表明了人工选择在其中所起到的重要作用;UPGMA聚类分析的结果显示,蒙古冰草的8个居群基本上可被分为与其生境土壤条件和生长条件相适应的3个类群,即沙地居群,石砾质坡地居群和沙壤质土栽培品种(系)3类,充分反映天然环境条件和人为环境条件或者说自然选择和人工选择对蒙古冰草居群间遗传分化的巨大影响.
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| 关 键 词： | 蒙古冰草 种质资源 遗传变异 |
Genetic variation of Agropyron mongolicum |
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| XIE Xin-ming,LU Xiao-liang,YUN Jin-feng.Genetic variation of Agropyron mongolicum[J].Journal of South China Agricultural University,2004,25(Z2). |
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| Authors: | XIE Xin-ming LU Xiao-liang YUN Jin-feng |
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| Abstract: | The genetic diversity of Agropyron mongolicum from six natural populations and two cultivars in the central and east regions of Inner Mongolia was synthetically assessed. It was showed that A. mongolicum possessed a higher genetic diversity within population than that among populations as a result of the cross-pollinated breeding system. Between natural populations and cultivars, the genetic diversity among six natural populations was much higher than that between two cultivars, owing to the environmental heterogeneity of natural populations. In the meantime, there also was a genetic differentiation between two cultivars. It was clear that artificial selection played an important role in the differentiation. UPGMA cluster analysis showed that eight populations could basically be divided into three groups adapting to their own soil conditions. These groups were sand-land populations, gravelly-slope populations and sandy soil cultivars respectively. It is enough to prove that natural and artificial selections have an enormous effect on the differentiation among populations. |
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| Keywords: | Agropyron mongolicum germplasm resource genetic variation |
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