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Genetic Diversity of Rice Collections using Subspecies-specific STS Markers  

Kim, Bong-Song (Korea National Agricultural College)
Jiang, Wenzhu (Dept of Plant Science, Plant Genomics and Breeding Institute, and Research Institute of Agriculture and Life Sciences, Seoul National University)
Koh, Hee-Jong (Dept of Plant Science, Plant Genomics and Breeding Institute, and Research Institute of Agriculture and Life Sciences, Seoul National University)
Publication Information
Korean Journal of Breeding Science / v.41, no.2, 2009 , pp. 101-105 More about this Journal
Abstract
Rice (Oryza sativa L.), the world's most important crop, is usually classified into ssp. indica and japonica based on morpho-physiological traits. In the previous study, we have developed subspecies-specific STS markers (SS markers) to readily discriminate between indica and japonica in O. sativa. In this study, we employed SS markers to investigate the genomic inclination of worldwide collections of O. sativa. A total of 320 varieties were divided into two groups with 63 SS markers. Namely, they formed two distinctive groups, indica and japonica, as expected by their geographic origin. The population structure analysis revealed that the variability of genetic background was greater in indica than in japonica. Some of them, however, exhibited intermediate genomic inclination between indica and japonica. These results are in general agreement with the previous studies, suggesting that SS markers are powerful tools for both determination of subspecies genome and assessment of genetic diversity in rice.
Keywords
Rice; Subspecies-specific marker; Genetic diversity;
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