Genetic diversity and elite gene introgression reveal the japonica rice breeding in northern China
查看参考文献62篇
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文摘
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Abundant genetic diversity and rational population structure of germplasm benefit crop breeding greatly. To investigate genetic variation among geographically diverse set of japonica germplasm, we analyzed 233 japonica rice cultivars collected from Liaoning, Jilin and Heilongjiang provinces of China, which were released from 1970 to 2011 by using 62 simple sequence repeat (SSR) markers and 8 functional gene tags related to yield. A total of 195 alleles (N_a) were detected with an average of 3.61 per locus,indicating a low level of genetic diversity level among all individuals. The genetic diversity of the cultivars from Jilin Province was the highest among the three geographic distribution zones. Moreover, the genetic diversity was increased slightly with the released period of cultivars from 1970 to 2011. The analysis of molecular variance (AMOVA) revealed that genetic differentiation was more diverse within the populations than that among the populations. The neighbor-joining (NJ) tree indicated that cultivar clusters based on geographic distribution represented three independent groups, among which the cluster of cultivars from Heilongjiang is distinctly different to the cluster of cultivars from Liaoning. For the examined functional genes, two or three allelic variations for each were detected, except for IPA1 and GW2, and most of elite genes had been introgressed in modern japonica rice varieties. These results provide a valuable evaluation for genetic backgrounds of current japonica rice and will be used directly for japonica rice breeding in future. |
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来源
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Journal of Integrative Agriculture
,2015,14(5):811-822 【核心库】
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DOI
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10.1016/S2095-3119(14)60898-4
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关键词
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japonica rice cultivars
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genetic diversity
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elite gene introgression
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simple sequence repeat
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functional gene tags
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地址
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Rice Research Institute, Shenyang Agricultural University, Key Laboratory of Northeast Rice Biology and Breeding, Ministry of Agriculture;;Key Laboratory of Northern japonica Super Rice Genetics and Breeding, Ministry of Education, Shenyang, 110866
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语种
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英文 |
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文献类型
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研究性论文 |
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ISSN
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2095-3119 |
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学科
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遗传学 |
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基金
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辽宁省高等学校优秀人才支持计划资助项目(LNET)
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国家自然科学基金
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文献收藏号
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CSCD:5418715
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