杂草稻、栽培稻及野生稻的遗传多样性比较  

Genetic diversities among weedy rices,cultivated rices and wild rices

作　　者：王黎明[1] 李战胜[1] 高旭华[1] 沈雪峰[1] 方越[1] 陈勇[1] 

机构地区：[1]华南农业大学农学院,广州510642

出　　处：《华中农业大学学报》2012年第3期275-280,共6页Journal of Huazhong Agricultural University

基　　金：转基因生物新品种培育科技重大专项(2009ZX08012-020B)

摘　　要：用30对SSR引物比较来自不同省区的12份杂草稻、34份栽培稻及36份普通野生稻的遗传多样性,共检测出121个等位变异,每个SSR位点的等位变异数在2～6之间,平均为4.033个。杂草稻、栽培稻和野生稻的遗传多样性指数分别为0.288 2、0.351 5和0.489 9,每个位点在杂草稻、栽培稻、野生稻中的等位基因数平均值分别为2.10、2.27、3.53,说明野生稻的遗传多样性最大。杂草稻与栽培稻之间的遗传距离(0.049 4)明显小于其与普通野生稻间的遗传距离(0.583 8),表明杂草稻与栽培稻亲缘关系较近,而与野生稻的亲缘关系较远,即杂草稻很可能起源于栽培稻的返祖退化。The genetic diversities of 12 weedy rices,34 cultivated rices and 36 wild rices were investigated by using 30 pairs of SSR primers,121 polymorphic bands were found,each SSR loci has 2-6 alleles,with an average number of 4.03.The genetic diversity index of weedy rice,cultivated rice and wild rice was 0.288 2、0.351 5 and 0.489 9,respectively.The average alleles of each loci were 2.1,2.27 and 3.53,respectively.This indicated that the genetic diversity of weedy rice was lower than that of cultivated rice and wild rice.The genetic distance between weedy rice and cultivated rice（0.049 4） was smaller significantly than that between weedy rice and wild rice,suggesting that the genetic relationship between weedy rice and cultivated rice was relatively closer and that weedy rice was probably degenerated atavisticly from cultivated rice.

关 键 词：杂草稻 栽培稻 野生稻 遗传多样性 SSR 

分 类 号：S511[农业科学—作物学]