Quantitative trait locus mapping for growth duration and its timing components in wheat

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• 作者：Ma Yu ; Guo-Yue Chen ; Zhi-En Pu ; Lian-Quan Zhang ; Deng-Cai Liu…
• 关键词：Growth duration ; QTL ; Conditional and unconditional mapping ; Wheat
• 刊名：Molecular Breeding
• 出版年：2015
• 出版时间：January 2015
• 年：2015
• 卷：35
• 期：1
• 全文大小：1,430 KB
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• 作者单位：Ma Yu (1) (2)
  Guo-Yue Chen (1)
  Zhi-En Pu (3)
  Lian-Quan Zhang (1)
  Deng-Cai Liu (1)
  Xiu-Jin Lan (1)
  Yu-Ming Wei (1)
  You-Liang Zheng (1)
  
  1. Triticeae Research Institute, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, Chengdu, 611130, Sichuan, China
  2. School of Life Science and Engineering, Southwest University of Science and Technology, 59 Qinglong Road, Mianyang, 621010, Sichuan, China
  3. Agronomy College, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, Chengdu, 611130, Sichuan, China
  
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Life Sciences
  Plant Sciences
  
• 出版者：Springer Netherlands
• ISSN：1572-9788

文摘

Growth duration, the entire developmental period from seed emergence to maturity, plays an important role in wheat adaptation and is a complex trait controlled by multiple genes and influenced by environmental factors. In order to precisely detect quantitative trait loci (QTLs) for wheat growth duration and its timing components, and dissect their genetic relationship, we performed QTL mapping and conditional analysis in a recombinant inbred line population. A total of 17 conditional QTLs and 30 unconditional QTLs were identified in this study, which explained 3.3-4.7?% of the phenotypic variation. Of them, 17 explained more than 10?% of the phenotypic variation and eight were environment-independent. Eight common QTLs were identified on chromosomes 1D, 2A, 2D, 3D, 4A, 5A, 7A and 7D, and explained significant phenotypic variation for two to eight traits. Notably, the QTL on chromosome 2D (genetic region of wPt-7149-wPt-667843) explained major phenotypic variation for emergence time (ET), heading time (HT), maturity time (MT) and growth duration (GD). The QTL on chromosome 3D (wPt-741816-wPt-732611) accounted for significant phenotypic variation for ET, TT and FT. Conditional analysis and unconditional analysis suggested that utilizing the genetic region of wPt-7149-wPt-667843 on chromosome 2D can modify ET, HT, MT and GD simultaneously, whereas the genetic region of wPt-741816-wPt-732611 on chromosome 3D can modify GD components individually to avoid change to the whole GD. This QTL mapping study and genetic relationship analysis between growth duration and its component traits should be of great practical and theoretical value for wheat breeding.