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草业学报  2013 

能源草芦竹遗传多样性的ISSR分析

DOI: 10.11686/cyxb20130335

Keywords: 芦竹,ISSR,遗传多样性,种群

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Abstract:

采用ISSR分子标记技术,对我国6省11个芦竹种群共89个个体的遗传多样性水平和遗传结构进行了研究。从UBC801~900中筛选出7个有效引物,共扩增出40个位点,其中多态性位点为38个。PCR产物的分子量为100~2000bp。在物种水平上,Shannon多样性指数为0.494,Nei指数为0.329,遗传分化系数Gst为0.826,平均基因流Nm为0.097。种群内的平均遗传多样度Hs为0.040。表明芦竹在物种水平上具有较高的遗传多样性而种群内的分化极小。UPGMA法聚类结果表明,芦竹11个种群分为3个类群:浙江和江苏的芦竹聚为一簇,湖南、贵州和广西的芦竹聚为一簇,云南种群单独为一支。不同种群芦竹亲缘关系的远近与它们的地理距离有一定的关系,但不完全一致。

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