用第8染色体的SSR标记分析香稻居群遗传多样性

SSR analysis for chromosome number 8 on genetic diversity of the populations of aromatic rice(Oryza sativa L.)

用5对与香味基因连锁的SSR标记对广西种植的香稻、非香地方籼型栽培稻、非香地方粳型栽培稻以及南亚香稻UPRB系列、UPRH系列、B系列共6个居群进行遗传多样性分析。结果表明,6个居群在第8染色体的遗传多样性以南亚香稻B系列居群的最大;聚类表明,南亚香稻居群与广西水稻居群(包括香稻与非香稻居群)各自聚为一类,说明南亚香稻与广西水稻种质在第8染色体上存在遗传差异,证明了南亚香稻类群的独特性。

The genetic diversity of six populations was evaluated by using 5 SSR markers linked to fgr,which included the aromatic rice, nonaromatic Indica and Japonica populations firm Guangxi,and UPRB ,UPRH and B populations firm South Asia aromatic rice genotypes. The results showed that the highest genetic diversity for chromosome number 8 was detected among the B population, The genetic relationships among the 6 populations were obtained by POPGENE analysis based Nei＇ s genetic distance, The 6 populations were clustered into two groups. Group I comprised the aromatic rice, non-aromatic Indica and Japonica populations from Guangxi. Group Ⅱ included UPRB, UPRH and B populations firm South Asia aromatic rice genotypes. This suggested that the genetic difference lied between the aromatic rice genotypes firm South Asia and that firm Guangxi. The genetic relationships among the 6 populations indicated that the aromatic rice genotypes from South Asia had developed a special aromatic rice type.