您好，欢迎访问中国农业科学院 机构知识库！

全部

  • 全部
  • 标题
  • 学者
  • 机构
  • 关键词

Fine mapping and candidate gene analysis of qHD1b, a QTL that promotes flowering in common wild rice (Oryza rufipogon) by up-regulating Ehd1

文献类型： 外文期刊

作者： Liu, Ling 1 ; Zhang, Yingxin 1 ; Yang, Zhengfu 3 ; Yang, Qinqin 1 ; Zhang, Yue 1 ; Xu, Peng 1 ; Li, Jiaxin 1 ; Islam, Anowerul 1 ; Shah, Liaqat 1 ; Zhan, Xiaodeng 1 ; Cao, Liyong 1 ; Cheng, Shihua 1 ; Wu, Weixun 1 ;

作者机构： 1.China Natl Rice Res Inst, China Natl Ctr Rice Improvement, Hangzhou 310006, Zhejiang, Peoples R China

2.China Natl Rice Res Inst, State Key Lab Rice Biol, Hangzhou 310006, Zhejiang, Peoples R China

3.Zhejiang A&F Univ, State Key Lab Subtrop Silviculture, Hangzhou 311300, Zhejiang, Peoples R China

4.China Natl Rice Res Inst, Northern Ctr, Hangzhou 310006, Zhejiang, Peoples R China

关键词： Rice; Heading date; Quantitative trait locus; qHD1b; Fine mapping

期刊名称：CROP JOURNAL （ 影响因子：4.647； 五年影响因子：5.781 ）

ISSN： 2095-5421

年卷期： 2022 年 10 卷 4 期

页码：

收录情况： SCI

摘要： Heading date (flowering time) determines the adaptability of cultivars to different environments. We report the fine mapping and candidate gene analysis of qHD1b, a quantitative trait locus (QTL) responsible for early flowering that was derived from common wild rice (O. rufipogon) under both short-day and long-day conditions. The introgression line IL7391, which carried segments from common wild rice in a Zhonghui 8015 (ZH8015) background, exhibited early heading compared to the background and was crossed with ZH8015 to generate BC5F2:3 families for QTL analysis. This enabled the identification of two heading-date QTL, named qHD1b and qHD7, of which the first was selected for further research. High-resolution linkage analysis was performed in BC5F4:5 and BC5F6 populations, and the location of qHD1b was confined to a 112.7-kb interval containing 17 predicted genes. Five of these genes contained polymorphisms in the promoter or coding regions and were thus considered as candidates. Expression analysis revealed a positive association between LOC_Os01g11940 expression and early heading. This locus was annotated as OsFTL1, which encodes an ortholog of Arabidopsis Flowering Locus T and was the most likely candidate gene for qHD1b. Our study revealed that qHD1b acts as a floral activator that promotes flowering by up-regulating Ehd1, Hd3a, RFT1, OsMADS14, and OsMADS15 under both short -day and long-day conditions. Field experiments showed that qHD1b affected several yield-related agronomic traits including 1000-grain weight and grain length. qHD1b could be useful for marker-assisted selection and breeding of early-maturing cultivars. (C) 2022 Crop Science Society of China and Institute of Crop Science, CAAS. Production and hosting by Elsevier B.V. on behalf of KeAi Communications Co., Ltd.

  • 相关文献
作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：中国农业科学院

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台