中国水稻科学 ›› 2019, Vol. 33 ›› Issue (1): 12-19.DOI: 10.16819/j.1001-7216.2019.8054

• 研究论文 • 上一篇    下一篇

云南地方品种子预44中一个新的抗稻瘟病基因的定位

卓晓轩, 樊琳琳, 安星宇, 郭敬玮, 杨睿, 曾千春, 罗琼*()   

  1. 云南农业大学 省部共建云南生物资源保护与利用国家重点实验室/云南农业大学 农业生物多样性与病虫害控制教育部重点实验室, 昆明 650201;
  • 收稿日期:2018-04-28 修回日期:2018-06-20 出版日期:2019-01-10 发布日期:2019-01-10
  • 通讯作者: 罗琼
  • 基金资助:
    国家重点研发计划资助项目(2016YFD0100601); 国家自然科学基金资助项目(31160223); 云南省高校科技创新团队支持计划资助(IRTSTYN)

Mapping of a New Rice Blast Resistance Gene in Ziyu 44, a Rice Landrace from Yunnan Province, China

Xiaoxuan ZHUO, Linlin FAN, Xingyu AN, Jingwei GUO, Rui YANG, Qianchun ZENG, Qiong LUO*()   

  1. State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Ministry of Education Key Laboratory of Agricultural Biodiversity for Plant Disease Management, Yunnan Agricultural University, Kunming 650201, China;
  • Received:2018-04-28 Revised:2018-06-20 Online:2019-01-10 Published:2019-01-10
  • Contact: Qiong LUO

摘要:

【目的】子预44是具有广谱持久稻瘟病抗性的云南地方粳稻品种。为了揭示子预44广谱持久抗瘟机制并在抗稻瘟病育种中进行有效利用,【方法】利用江南香糯与子预44杂交构建的遗传群体及分离自云南罗平的稻瘟病菌株LP36进行子预44的抗性遗传分析和抗性基因定位。【结果】子预44对LP36的抗性为单显性基因控制,暂定名为Pi-zy4(t),它位于水稻第4染色体长臂上SSR标记RM5503与RM3276之间约318 kb区间内。【结论】Pi-zy4(t)为新的抗稻瘟病基因。研究结果为子预44的育种利用和Pi-zy4(t)基因的克隆提供了重要信息。

关键词: 水稻, 稻瘟病, 抗稻瘟病基因, 基因定位

Abstract:

【Objective】Ziyu 44 (Oryza sativa L. subsp. geng), a landrace of Yunnan Province, has broad-spectrum and durable blast resistance. In order to understand the molecular mechanism of resistance to rice blast, 【Method】we carried out the genetic analysis of resistance of Ziyu 44 to the Magnaporthe oryzea LP36 from Luoping County, Yunnan Province, and mapped the gene responsible for resistance to strain LP36 by using an F2 population from the cross between Jiangnanxiangnuo and Ziyu 44. 【Result】The resistance of Ziyu 44 to LP36 is controlled by a single dominant gene, termed as Pi-zy4(t), which was located on the long arm of chromosome 4 between simple sequence repeat markers RM5503 and RM3276 within about 318 kb.【Conclusion】Pi-zy4(t) is a new gene conferring resistance to rice blast. Our results provide essential information for further utilization of the blast resistance gene in rice breeding and its cloning.

Key words: rice, rice blast, blast resistance gene, gene mapping

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