Divergent Hd1, Ghd7, and DTH7 Alleles Control Heading Date and Yield Potential of Japonica Rice in Northeast China.
Divergent Hd1, Ghd7, and DTH7 Alleles Control Heading Date and Yield Potential of Japonica Rice in Northeast China.
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DOI：
10.3389/fpls.2018.00035
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发表时间：
2018
影响因子：
5.6
通讯作者：
Wei X
中科院分区：
文献类型：
--
作者：
Ye J;Niu X;Yang Y;Wang S;Xu Q;Yuan X;Yu H;Wang Y;Wang S;Feng Y;Wei X
抽穗期是水稻获得充分产量的一个重要因素。人工选育出开花习性独特的品种，使其能在东北地区长日照、低温条件下生存。为揭示东北地区水稻群体抽穗期的遗传机制，利用关联分析方法对东北地区水稻群体抽穗期的主效基因进行了定位。全基因组关联研究（GWAS）使用一般和混合线性模型确定了三个遗传位点，Hd1，Ghd7和DTH7。对这三个基因进行测序，分析其自然变异并鉴定其功能。在东北北方地区，这些基因的功能缺失等位基因对早稻抽穗期有贡献，而功能等位基因对晚稻抽穗期有促进作用。在新品种选育中，应选择环境适宜的等位基因组合。将早籼稻的遗传背景导入东北粳稻是提高遗传多样性的合理策略。
The heading date is a vital factor in achieving a full rice yield. Cultivars with particular flowering behaviors have been artificially selected to survive in the long-day and low-temperature conditions of Northeast China. To dissect the genetic mechanism responsible for heading date in rice populations from Northeast China, association mapping was performed to identify major controlling loci. A genome-wide association study (GWAS) identified three genetic loci, Hd1, Ghd7, and DTH7, using general and mixed linear models. The three genes were sequenced to analyze natural variations and identify their functions. Loss-of-function alleles of these genes contributed to early rice heading dates in the northern regions of Northeast China, while functional alleles promoted late rice heading dates in the southern regions of Northeast China. Selecting environmentally appropriate allele combinations in new varieties is recommended during breeding. Introducing the early indica rice’s genetic background into Northeast japonica rice is a reasonable strategy for improving genetic diversity.
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