中国水稻科学 ›› 2018, Vol. 32 ›› Issue (1): 43-50.DOI: 10.16819/j.1001-7216.2018.7011

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应用东乡野生稻回交重组自交系群体分析糙米矿质含量QTL

胡标林1,2, 黄得润1, 肖叶青2, 何强生3, 万勇2,*(), 樊叶杨1,*()   

  1. 1中国水稻研究所 国家水稻改良中心/水稻生物学国家重点实验室, 杭州 310006
    2江西农业科学院 水稻研究所/国家水稻改良中心南昌分中心, 南昌 330200
    3江西兴安种业有限公司, 江西 上饶 334300
  • 收稿日期:2017-01-19 修回日期:2017-04-02 出版日期:2018-01-10 发布日期:2018-01-10
  • 通讯作者: 万勇,樊叶杨
  • 基金资助:
    国家863计划资助项目(2014AA10A604);江西省重点研发计划重大专项(20161ACF60022);江西省自然科学基金资助项目(20171ACB21071);江西省农业科学院创新基金资助项目(20161CBS002)

QTL Analysis for Mineral Contents in Brown Rice Using a BC2F4:5 Population Derived from Dongxiang Wild Rice (Oryza rufipogon Griff.)

Biaolin HU1,2, Derun HUANG1, Yeqing XIAO2, Qiangsheng HE3, Yong WAN2,*(), Yeyang FAN1,*()   

  1. 1State Key Laboratory of Rice Biology/Chinese National Center for Rice Improvement, China National Rice Research Institute, Hangzhou 310006, China
    2Rice Research Institute, Jiangxi Academy of Agricultural Sciences and Nanchang National Sub-center for Rice Improvement, Nanchang 330200, China
    3Jiangxi Xingan Seed Industry Co. Ltd, Shangrao 334300, China
  • Received:2017-01-19 Revised:2017-04-02 Online:2018-01-10 Published:2018-01-10
  • Contact: Yong WAN, Yeyang FAN

摘要:

【目的】 强化粮食作物的必需矿物质有利于缓解人们矿质营养缺乏症。【方法】 从协青早B//协青早B/东乡野生稻BC1F5群体中挑选到1个单株A58,与协青早B回交,构建了BC2F4:5群体。采用电感耦合等离子体原子发射光谱仪ICP-AES测定132个BC2F4:5株系的糙米Mg、Ca、Zn、Fe、Mn和Cu含量,应用Windows QTL Cartographer 2.5进行糙米矿质QTL分析。【结果】 共检测到17个糙米矿质含量QTL,分别位于第1、4、6、8、9和11等6条染色体上,包括Mg含量1个、Ca含量4个、Zn含量4个、Fe含量2个、Mn含量2个和Cu含量4个。这些QTL解释表型变异的5.0%~47.2%,其中8个QTL的增效等位基因来自东乡野生稻。【结论】 12个QTL聚集于5条染色体上的5个QTL簇,表明不同矿质营养元素涉及到共同遗传生理机制,可通过分子标记辅助选择方法将有利等位基因应用于稻米营养品质改良。

关键词: 东乡野生稻, 糙米, 矿质含量, QTL定位

Abstract:

【Objective】 Biofortifying food crops with essential minerals would alleviate mineral deficiencies in humans.【Method】 One plant A58 was selected from Xieqingzao B// Xieqingzao B /Dongxiang wild rice BC1F5 population, and was backcrossed with Xieqingzao B to develop a BC2F4:5 population. The contents of Mg, Ca, Zn, Fe, Mn and Cu in brown rice of 132 BC2F4:5 lines were measured with an inductively coupled plasma atomic emission spectrometer (ICP-AES). Detection of quantitative trait loci (QTLs) for mineral contents in brown rice was conducted using Windows QTL Cartographer 2.5.【Result】 A total of 17 QTLs for mineral contents in brown rice were detected on chromosomes 1, 4, 6, 8, 9 and 11, respectively, including one for Mg content, four for Ca content, four for Zn content, two for Fe content, two for Mn content, and four for Cu content. The explained phenotypic variations ranged from 5.0% to 47.2%, and eight QTLs of them had the enhancing alleles derived from Oryza rufipogon. 【Conclusion】 Twelve QTLs were clustered in five chromosomal regions, indicating that common genetic-physiological mechanisms were involved for different mineral nutrients, and the beneficial alleles could be utilized to improve grain nutritional quality by marker-assisted selection.

Key words: Dongxiang wild rice, brown rice, mineral content, QTL mapping

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