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Acta Agron Sin ›› 2017, Vol. 43 ›› Issue (04): 496-500.doi: 10.3724/SP.J.1006.2017.00496


Mapping QTLs for Awn Length in Recombinant Inbred Line Population Derived from the Cross between Common Wheat and Tibetan Semi-wild Wheat

GONG Xi1,JIANG Yun-Feng2,XU Bin-Jie2,QIAO Yuan-Yuan2,HUA Shi-Yu1,WU Wang1,MA Jian2,ZHOU Xiao-Hong2,QI Peng-Fei2,*,LAN Xiu-Jin2   

  1. 1 College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China; 2 Triticeae Research Institute, Sichuan Agricultural University, Chengdu, 611130, China
  • Received:2016-04-14 Revised:2016-11-03 Online:2017-04-12 Published:2016-11-29
  • Contact: Qi Pengfei, E-mail: pengfeiqi@hotmail.com, Tel: 028-82650337 E-mail:360035030@qq.com
  • Supported by:

    This study was supported by the National Natural Science Foundation of China (31570335).


Awn length is an important agronomic trait in hexaploid wheat and controlled by multiple genes. A recombinant inbred line (RIL) population containing 186 lines were developed by crossing Tibetan semi-wild wheat accession Q1028 (female) and common wheat variety Zhengmai 9023, and a genome-wide genetic map (2597 cM) was constructed using SSR and DArT markers. QTLs controlling awn length were identified with two-year phenotypic data and the genetic map by using the Inclusive Composite Interval Mapping (ICIM) method. Two QTLs associated with awn length, designated Qwa.sau-4AS and Qwa.sau-5AL, were detected on chromosomes 4A and 5A, which explained 7.4% and 27.3% of phenotypic variations, respectively. According to genetic locations, effects of the two QTLs might be from Hd and B1 genes that could reduce awn length, respectively. Genetic analysis showed that Qwa.sau-4AS and Qwa.sau-5AL had cumulative effect, with a stronger inhibiting effect in Qwa.sau-5AL than in Qwa.sau-4AS. These results are valuable for fine mapping and cloning target genes controlling awn length in the future.

Key words: Common wheat, Awn length, QTL, SSR marker, DArT marker

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