Genetic Diversity and Structure of New Inbred Rice Cultivars in China

doi:10.1016/S1671-2927(00)8689

Journal of Integrative Agriculture ›› 2012, Vol. 12 ›› Issue (10): 1567-1573.DOI: 10.1016/S1671-2927(00)8689

• 论文 • 下一篇

Genetic Diversity and Structure of New Inbred Rice Cultivars in China

XU Qun, CHEN Hong, WANG Cai-hong, YU Han-yong, YUAN Xiao-ping, WANG Yi-ping, FENG Yue, TANG Sheng-xiang, WEI Xing-hua

1 State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, P.R.China
2.Development Center for Science and Technology, Ministry of Agriculture, Beijing 100122, P.R.China

收稿日期:2011-05-12 出版日期:2012-10-01 发布日期:2012-11-12
作者简介:XU Qun, Tel: +86-571-63370583, E-mail: xuqun37@hotmail.com
基金资助:
This work was supported by the Basic Research for Science and Technology of the Ministry of Sciecne and Technology, China (2008FY220200).

Genetic Diversity and Structure of New Inbred Rice Cultivars in China

XU Qun, CHEN Hong, WANG Cai-hong, YU Han-yong, YUAN Xiao-ping, WANG Yi-ping, FENG Yue, TANG Sheng-xiang, WEI Xing-hua

1 State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, P.R.China
2.Development Center for Science and Technology, Ministry of Agriculture, Beijing 100122, P.R.China

Received:2011-05-12 Online:2012-10-01 Published:2012-11-12
Contact: Correspondence WEI Xing-hua, Tel: +86-571-63370366, E-mail: xwei@mail.hz.zj.cn
About author:XU Qun, Tel: +86-571-63370583, E-mail: xuqun37@hotmail.com
Supported by:
This work was supported by the Basic Research for Science and Technology of the Ministry of Sciecne and Technology, China (2008FY220200).

摘要/Abstract

摘要： A total of 408 inbred rice cultivars bred in the last decade were analyzed for 24 SSR markers. The results showed the genetic diversity of indica cultivars was higher than that of japonica cultivars, and the genetic diversity of new cultivars raised in recent years was lower. Among the six rice cropping regions (RCRs) in China, genetic diversity was the highest in the central rice region (RCR-II) and the southwest rice region (RCR-III). Genetic differences among subpopulations of japonica were more complex than those in indica. Differentiation among seasonal ecotypes and RCRs in indica populations was unclear, but differentiation between RCR-II and northeast rice region (RCR-V) was more distinct for japonica cultivars. Considering the North rice region (RCR-IV) has very low genetic diversity among the tested cultivars, it is important to broaden the genetic background for future cultivars in rice breeding programs.

关键词: rice , Oryza sativa , cultivars , genetic diversity

Abstract: A total of 408 inbred rice cultivars bred in the last decade were analyzed for 24 SSR markers. The results showed the genetic diversity of indica cultivars was higher than that of japonica cultivars, and the genetic diversity of new cultivars raised in recent years was lower. Among the six rice cropping regions (RCRs) in China, genetic diversity was the highest in the central rice region (RCR-II) and the southwest rice region (RCR-III). Genetic differences among subpopulations of japonica were more complex than those in indica. Differentiation among seasonal ecotypes and RCRs in indica populations was unclear, but differentiation between RCR-II and northeast rice region (RCR-V) was more distinct for japonica cultivars. Considering the North rice region (RCR-IV) has very low genetic diversity among the tested cultivars, it is important to broaden the genetic background for future cultivars in rice breeding programs.

Key words: rice , Oryza sativa , cultivars , genetic diversity

XU Qun, CHEN Hong, WANG Cai-hong, YU Han-yong, YUAN Xiao-ping, WANG Yi-ping, FENG Yue, TANG Sheng-xiang, WEI Xing-hua. Genetic Diversity and Structure of New Inbred Rice Cultivars in China[J]. Journal of Integrative Agriculture, 2012, 12(10): 1567-1573.

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Genetic Diversity and Structure of New Inbred Rice Cultivars in China

Genetic Diversity and Structure of New Inbred Rice Cultivars in China

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