中国水稻科学2012，Vol.26Issue(4)：431-437,7.DOI:10.3969/j.issn.1001-7216.2012.04.007
江淮稻区不同生态型粳稻品种的籼粳分化度和遗传多样性
Indica-japonica Differentiation Degree and Genetic Diversity of japonica Cultivars Belonging to Different Ecotypes from the Yangtze-Huaihe Region
摘要
Abstract
Indica-japonica differentiation degree of 81 japonica cultivars belonging to different ecotypes from Jiang-Huai Region were investigated by 25 specific SSR markers of indica-japonica differentiation. TD, values of the cultivars ranged from 0. 773 to 0. 962, indicating most of the cultivars had a high japonica component degree with the medium maturing mid-season japonica ( MMMj) being the highest and late japonica being the lowest. In the 81 japonica cultivars, a total of 131 alleles were detected at 49 SSR loci, and allele number per marker ranged from 2 to 5. with an average of 2. 67. Polymorphism information contentCPIC) value of 49 SSR primer ranged from 0. 068 to 0. 657, with the average value 0. 362. Among the 12 chromosomes,chromosome 11 showed the highest average allele number and PIC value. Of the three different ecological type japonica cultivars, genetic diversity of the late maturing mid-season japonica(LMMj) was the highest according to PIC and mean heterozygosity per locus(He). The coefficient of genetic similarity was the highest while the value of genetic distance was the lowest between MMMj and LMMj, and the coefficient of genetic similarity was the lowest while the value of genetic distance was the highest between MMMj and late japonica. Clustering analysis with UPGMA method showed cultivars bred in the same breeding organization had a small average genetic distance among cultivars.关键词
粳稻/微卫星标记/籼粳分化/遗传多样性/聚类分析Key words
japonica rices simple sequence repeats/ indica-japonica differentiation/ genetic diversity/ cluster analysis分类
农业科技引用本文复制引用
周振玲,王宝祥,樊继伟,卢百关,赵志刚,江玲,秦德荣,万建民,徐大勇..江淮稻区不同生态型粳稻品种的籼粳分化度和遗传多样性[J].中国水稻科学,2012,26(4):431-437,7.基金项目
现代农业产业技术体系建设专项 （）
江苏省农业三项工程项目(SX2011002) （SX2011002）
江苏省科技成果转化专项(BA2011098). （BA2011098）
