文献类型： 外文期刊

作者： Deng Xiao-juan ¹ ; Luo Xiang-dong ¹ ; Dai Liang-fang ¹ ; Chen Ya-ling ¹ ; Hu Biao-lin ² ; Xie Jian-kun ¹ ;

作者机构： 1.Jiangxi Normal Univ, Coll Life Sci, Nanchang 330022, Peoples R China

2.Jiangxi Acad Agr Sci, Rice Res Inst, Nanchang 330200, Peoples R China

关键词： Oryza rufipogon Griff.;alien gene introgression;genetic diversity;genetic variation

期刊名称：JOURNAL OF INTEGRATIVE AGRICULTURE （ 影响因子：2.848； 五年影响因子：2.979 ）

ISSN： 2095-3119

年卷期： 2012 年 11 卷 7 期

页码：

收录情况： SCI

摘要： The objectives of the present study were to estimate genetic diversity and genetic changes of introgression lines (ILs) which derived from cultivated rice (Oryza saliva L. cv. Xieqingzao B, XB) mating with common wild rice (O. rufipogon Griff., CWR). The genetic data of 239 ILs were based on a total of 131 polymorphic microsatellite (SSR) markers distributed across the 12 chromosomes of rice. On average, these ILs possessed 77.1 and 14.31% homozygous bands from XB and CWR, respectively. Most of the ILs were clustered together with XB individual, which was revealed by principal coordinate analysis (PCA.) and the program STRUCTURE analysis. The result from PCA demonstrated that some intermediate genotypes between XB and CWR. were also found. Moreover, there were some genomic sequence changes including parental bands elimination and novel bands emergence in the ILs. The average Nei's gene diversity (He) was 0.296, which was higher than that of cultivated rice. It suggested that interspecific hybridization and gene introgression could broaden the base of genetic variation and lay an important foundation for rice genetic improvement. These different genotypic ILs would provide a better experimental system for understanding the evolution of rice species and the mechanism of alien gene introgression.