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Development and evaluation of multi-genotype varieties of rice derived from MAGIC lines

文献类型: 外文期刊

作者: Li, Xiao-Fang 1 ; Liu, Zhi-Xia 1 ; Lu, Dong-Bo 1 ; Liu, Yan-Zhuo 1 ; Mao, Xing-Xue 1 ; Li, Zhi-Xin 2 ; Li, Hua-Jun 3 ;

作者机构: 1.Guangdong Acad Agr Sci, Rice Res Inst, Guangzhou 510640, Peoples R China

2.Yangtze River Univ, Crop Genet & Breeding Inst, Jinzhou 434025, Peoples R China

3.Guangzhou Nanguo Agr Grp Co Ltd, Guangzhou 510405, Guangdong, Peoples R China

关键词: Multi-genotype;MAGIC;Genetic diversity;Breeding;Rice

期刊名称:EUPHYTICA ( 影响因子:1.895; 五年影响因子:2.181 )

ISSN: 0014-2336

年卷期: 2013 年 192 卷 1 期

页码:

收录情况: SCI

摘要: Multi-genotype varieties can effectively alleviate or reverse the decline of genetic diversity in agriculture caused by the predominant extension of mono-genotype (pure line) varieties of crop plants. We devised a novel breeding strategy for developing multi-genotype varieties of rice from MAGIC lines, which were derived from two convergent crosses among 8 or 12 parental lines, respectively. We found that both multi-genotype varieties and varietal mixtures were superior to their component lines/varieties in both yielding and blast-resistance performances. When the multi-genotype varieties were developed through intensive selection, they displayed comparable or better performance in yielding level and disease resistance in comparison to current leading mono-genotype varieties of rice. A promising multi-genotype variety has been selected over a 2-year regional trial in Hainan province and it will be hopefully granted a varietal-release permit. Multi-genotype breeding may be an alternative and feasible solution to the sustainable development of agriculture.

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