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草业学报  2013 

柳枝稷种质资源遗传多样性的ISSR分析

DOI: 10.11686/cyxb20130627, PP. 213-221

Keywords: 柳枝稷,种质资源,ISSR,遗传多样性

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Abstract:

应用ISSR标记对138份柳枝稷种质的遗传多样性和遗传结构进行研究,为资源保护利用提供理论依据和技术支持。研究结果显示,1)从100个ISSR引物中筛选出16个条带清楚且稳定的引物,共扩增出220条谱带,其中,多态性谱带196条,多态性比率(PPB)为89.09%,平均每个引物扩增条带数为13.75条。2)POPGENE1.32软件分析结果显示,138份柳枝稷基因多样性指数(H)为0.2498,Shannon指数(I)为0.3880,表明供试的种质间遗传多样性较丰富,遗传多样性水平较高。3)AMOVA1.55软件方差分析结果显示,43.40%的遗传变异存在于生态型之间,56.60%遗传变异存在于生态型之内,说明遗传结构的变异主要存在于生态型之内。4)NTsys-pc2.1软件进行UPGMA聚类分析和主成分分析(PCA),供试138份柳枝稷种质间Dice遗传相似系数(GS)值为0.4000~0.8818,平均值0.7237,结果表明,低地型材料聚为一大类,高地型材料聚为一大类。

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