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期 刊 ：植物遗传资源学报 2014年 15卷 3期

关键词：水稻；遗传多性性；微卫星标记；纬度；

Keywords:rice, genetic diversity, SSR marker, latitude,

摘 要 ：探讨世界不同国家水稻品种的遗传多样性，旨在为各国品种资源的有效利用提供理论依据。本研究利用63对引物对36份来源于不同国家的水稻材料进行遗传多样性分析。共检测到269个等位基因，每个位点的等位基因数（Na）平均为4.27个，有效等位基因数（Ne）平均为3.22，基因多样性指数（H）平均为0.62，Shannon‘s信息指数（I）平均为1.16，引物RM206、RM257、RM410、RM235、RM266的等位基因数较多在7条以上。所处纬度相近的国家或地区的水稻品种之间的遗传距离较近被聚为同一类群，而所处纬度较远的国家或地区的水稻品种被分到了不同类群。结果表明，水稻品种之间的遗传差异与纬度和地理距离有很大的关系。

Abstract:To reveal the genetic basic of rice varieties from different countries and use rice germplasm resources effectively, the genetic diversity of 36 rice varieties from different countries was analyzed by using 63 SSR markers. As the result, 269 alleles were detected between these varieties. And 4.27 alleles were on per gene locus averagely, the average effective number of alleles was3.22, the average gene diversity of these rice varieties was 0.62, and the average Shannon‘s Information index was 1.16. The marker RM206, RM257, RM410, RM235 and RM266 have more alleles than 7. Rice verities from countries at the similarity latitude were aggregated together, while from countries with more different latitude were assigned to different groups. The results indicated that genetic difference between the rice varieties from different countries had a close relationship with the geographical position and the latitude.

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