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Genetic Diversity and Genetic Changes in the Introgression Lines Derived from Oryza sativa L. Mating with O. rufipogon Griff

机译:稻瘟病菌交配的水稻自交系的遗传多样性和遗传变化

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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 sativa 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.

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  • 来源
    《农业科学学报(英文版)》 |2012年第7期|1059-1066|共8页
  • 作者单位

    College of Life Science, Jiangxi Normal University, Nanchang 330022, P.R. China;

    College of Life Science, Jiangxi Normal University, Nanchang 330022, P.R. China;

    College of Life Science, Jiangxi Normal University, Nanchang 330022, P.R. China;

    College of Life Science, Jiangxi Normal University, Nanchang 330022, P.R. China;

    Rice Research Institute, Jiangxi Academy of Agricultural Sciences, Nanchang 330200, P.R.China;

    College of Life Science, Jiangxi Normal University, Nanchang 330022, P.R. China;

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