地中海地区稻种资源的籼粳分类及遗传多样性

Ecotypes and Genetic Diversity of Rice Genetic Resources from the Mediterranean Area

利用SSR标记及程氏综合指数法分析了109份从地中海引进的水稻种质资源的遗传多样性和籼粳类型,同时利用籼粳测交法分析了其中37份资源的籼粳亲和性。结果表明,大部分引进的水稻种质属粳稻类型,基于SSR聚类、程氏综合指数法分析所确定的粳型品种数分别占引进种质的80.73%和77.98%,基于籼粳亲和性分类所确定的粳型品种数占供试37份资源的75.68%。地中海稻种资源具有较高的遗传多样性,平均有效等位基因数为3.84个,Nei多样性指数平均值为0.482,其中籼稻群与粳稻群的Nei多样性指数分别为0.459和0.340,籼稻遗传多样性高于粳稻。研究结果对于科学引进、合理保存和有效利用国外水稻种质改良国内水稻品种具有指导意义。

Genetic diversity and classification of indica and japonica for 109 accessions of rice from the Mediterranean area were studied by SSR markers and morphological traits.The results showed that 80.73% and 77.98% of the accessions were clustered into japonica group based on the two approaches,respectively,which means that most of the accessions of rice genetic resources from the Mediterranean area were japonica ecotype.37 ones were selected from 109 accessions to evaluate the compatibility with indica and japonica.75.68% of 37 accessions shown good compatibility to japonica.The Mediterranean rice had high genetic diversity with 3.84 average effective numbers of alleles（Ae）and 0.482 average Neis genetic diversity index（H）.The level of genetic diversity of indica group was higher than japonica group with Neis genetic diversity index of 0.459 and 0.340,respectively.These results are useful for properly conserving and effectively using rice genetic resources from Mediterranean area.