KOREAN JOURNAL OF CROP SCIENCE (한국작물학회지)

The Korean Society of Crop Science (한국작물학회)
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Analysis of genetic diversity and population structure of rice cultivars from Africa, Asia, Europe, South America, and Oceania using SSR markers

  • Cheng, Yi (Department of Plant Resources, College of Industrial Science, Kongju National University) ;
  • Cho, Young-Il (Department of Plant Resources, College of Industrial Science, Kongju National University) ;
  • Chung, Jong-Wook (Department of Plant Resources, College of Industrial Science, Kongju National University) ;
  • Ma, Kyung-Ho (National Agrobiodiversity Center, National Institute of Agricultural Biotechnology, RDA) ;
  • Park, Yong-Jin (Department of Plant Resources, College of Industrial Science, Kongju National University)
  • Published : 2009.12.31
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Abstract

In this study, 29 simple sequence repeat (SSR) markers were used to analyze the genetic diversity and population structure of 125 rice accessions from 40 different origins in Africa, Asia, Europe, South America, and Oceania. A total of 333 alleles were detected, with an average of 11.5 per locus. The mean values of major allele frequency, expected heterozygosity, and polymorphism information content (PIC) for each SSR locus were 0.39, 0.73, and 0.70, respectively. The highest mean PIC was 0.71 for Asia, followed by 0.66 for Africa, 0.59 for South America, 0.53 for Europe, and 0.47 for Oceania. Model-based structure analysis revealed the presence of five subpopulations, which was basically consistent with clustering based on genetic distance. Some accessions were clearly assigned to a single population in which >70% of their inferred ancestry was derived from one of the model-based populations. In addition, 12 accessions (9.6%) were categorized as having admixed ancestry. The results could be used to understanding the genetic structure of rice cultivars from these regions and to support effective breeding programs to broaden the genetic basis of rice varieties.

Keywords

References

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