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作物学报 ›› 2016, Vol. 42 ›› Issue (12): 1764-1778.doi: 10.3724/SP.J.1006.2016.01764

• 作物遗传育种·种质资源·分子遗传学 • 上一篇    下一篇

小麦燕大1817×北农6号重组自交系群体在正常和盐胁迫水培条件下苗期性状的QTL定位

周升辉1,吴秋红1,谢菁忠1,陈娇娇1,陈永兴1,傅琳1,王国鑫1,于美华1,王振忠2,张德云1,王令1,王丽丽1,张艳3,梁荣奇1,韩俊4,刘志勇1,*   

  1. 1中国农业大学农学院, 北京 100193; 2中国农村技术开发中心, 北京 100045; 3中国农业大学园艺学院, 北京 100193; 4北京农学院, 北京102206
  • 收稿日期:2016-04-19 修回日期:2016-06-20 出版日期:2016-12-12 网络出版日期:2016-07-04
  • 通讯作者: 刘志勇, E-mail: zyliu@genetics.ac.cn
  • 基金资助:

    本研究由国家自然科学基金项目(31301312, 31271710)资助。

Mapping QTLs for Wheat Seedling Traits in RILs Population of Yanda 1817 × Beinong 6 under Normal and Salt-Stress Conditions

ZHOU Sheng-Hui1,WU Qiu-Hong1,XIE Jing-Zhong1,CHEN Jiao-Jiao1,CHEN Yong-Xing1,FU Lin1,WANG Guo-Xin1,YU Mei-Hua1,WANG Zhen-Zhong2,ZHANG De-Yun1,WANG Ling1,WANG Li-Li1,ZHANG Yan3,LIANG Rong-Qi1,HAN Jun4,LIU Zhi-Yong1,*   

  1. 1College of Agronomy, China Agricultural University, Beijing 100193, China; 2 China Rural Technology Development Center, Beijing 100045, China;
    3 College of Horticulture, China Agricultural University, Beijing 100193, China; 4 Beijing University of Agriculture, Beijing 102206, China
  • Received:2016-04-19 Revised:2016-06-20 Published:2016-12-12 Published online:2016-07-04
  • Contact: LIU Zhiyong, E-mail: zyliu@genetics.ac.cn
  • Supported by:

    This study was supported by the National Natural Science Foundation of China (31301312, 31271710).

摘要:

小麦苗期性状能够指示品种的耐盐性。本研究以小麦骨干亲本燕大1817与品系北农6号衍生的230个重组自交系为材料,利用2013年3个不同时间的水培试验数据和已经构建的SSR和SNP高密度遗传连锁图谱分别对正常和盐胁迫条件下根数和最长根长等7个苗期性状进行QTL定位。利用完备复合区间作图法(ICIM)共检测到69个加性效应QTL(LOD≥2.5),分布于除1A染色体外的所有20条染色体上,单个QTL解释的表型变异率为2.70%~19.00%。有46个QTL的增效效应来自于燕大1817,有23个QTL的增效效应来自于北农6号。有12个QTL能够在3个或3个以上的环境中被检测到,在燕大1817中定位到稳定的多分蘖主效QTLQTn.cau-7BS.1和盐胁迫条件下特异表达的根数QTLQRn.cau-2A,解析了小麦骨干亲本燕大1817的繁茂性和抗逆性遗传基础,为解析小麦品种耐盐遗传机理和耐盐性的分子标记辅助选择提供了重要信息。

关键词: 小麦, 重组自交系, 苗期, 耐盐, 数量性状位点

Abstract:

Seedling traits are known to be important indicators of salt tolerance inwheat (Triticumaestivum L.). Quantitative trait loci (QTLs) mapping for wheat seedling traits under salt stress and normal hydroponics conditions were conducted at three times during 2013 using a set of 230 recombinant inbred lines (RILs) derived from across of Yanda 1817 × Beinong 6 and an available high-density integrated SSR and SNP genetic linkage map. A total of 69 putative QTLs associated with sevenseedling traits were detected on 20 chromosomes except for 1Aby inclusive composite interval mapping (ICIM) at LOD≥2.5. A single QTL explained 2.70–19.00% of the phenotypic variation. Of which, 46 QTLs showed additive effects originated from Yanda 1817, whereas 23 QTLs showed additive effects derived from Beinong 6, indicating that the founder parentYanda 1817 is an important genetic resource for salt tolerance in wheat. Twelve QTLsare considered to be stable QTLs because they were detected in at least three environments, including the major QTLQTn.cau-7BS.1for tiller numberandthe salt-induced QTL QRn.cau-2Afor root number, bothoriginating from Yanda 1817. These results may explain the genetic bases of luxuriant growing habit and stress tolerance of Yanda 1817.

Key words: Wheat, RIL, Seedling, Salt tolerance, QTL

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