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Comparison of Cheng's Index-and SSR Marker-based Classification of Asian Cultivated Rice

作者：

Wang Cai-hong;Xu Qun;Yu Ping;Yuan Xiao-ping;Yu Han-yong;Wang Yi-ping;Tang Sheng-xiang;Wei Xing-hua

单位：

China Natl Rice Res Inst

关键词：

Oryza sativa;classification;Cheng's index;simple sequence repeat marker;GENETIC DIVERSITY;MICROSATELLITE

摘要：

A total of 100 cultivated rice accessions, with a clear isozyme-based classification, were analyzed based on Cheng's index and simple sequence repeat (SSR) marker. The results showed that the isozyme-based classification was in high accordance with that based on Cheng's index and SSR markers. Mantel-test revealed that the Euclidean distance of Cheng's index was significantly correlated with Nei's unbiased genetic distance of SSR markers (r = 0.466, P <= 0.01). According to the model-based group and cluster analysis, the Cheng's index-and SSR-based classification coincided with each other, with the goodness of fit of 82.1% and 84.7% in indica, 97.4% and 95.1% in japonica, respectively, showing higher accordance than that within subspecies. Therefore, Cheng's index could be used to classify subspecies, while SSR marker could be more efficient to analyze the subgroups within subspecies.

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Comparison of Cheng's Index-and SSR Marker-based Classification of Asian Cultivated Rice

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