African Journal of
Biotechnology

  • Abbreviation: Afr. J. Biotechnol.
  • Language: English
  • ISSN: 1684-5315
  • DOI: 10.5897/AJB
  • Start Year: 2002
  • Published Articles: 12505

Full Length Research Paper

Detection of the introgression loci in Triticum aestivum transferred from Aegilops tauschii by simple sequence repeat (SSR) markers

Yu-Min Yang1,2, Qing-Yu Zhang1, Jun Li2, Hui-Ting Wei3, Xiao-Rong Hu2, Zheng-Song Peng4, Wu-Yun Yang2*
1Soil and Fertilizer Institute, Sichuan Academy of Agricultural Science, Chengdu, 610066, China. 2Crop Research Institute, Sichuan Academy of Agricultural Science, Chengdu, China, 610066, China. 3Plant Protection Institute, Sichuan Academy of Agricultural Science, Chengdu, China, 610066, China. 4Life Science College, China West Normal University, Nanchong, 637002, China.
Email: [email protected]

  •  Accepted: 25 April 2012
  •  Published: 31 July 2012

Abstract

Aegilops tauschii possesses many valuable traits or genes. The introgression loci transferred from A. tauschii in populations of 64 lines of BC1F2 and 147 advanced lines of BC1F2-F7 derived from the cross of Chinese Spring (CS; Triticum aestivum) /SQ-214 (A. tauschii) //SW3243 (T. aestivum) was characterized using simple sequence repeat (SSR) markers. 68 polymorphic loci covering the D genome were used to analyze the distribution of A. tauschii SQ-214 introgression loci in the two derived populations. The result shows that 82.35% loci of A. tauschii SQ-214 were detected in BC1F2 population, while the frequency of introgression loci was 51.47% in the advanced lines of BC1F2-F7 after artificial selection for stripe rust resistance and agronomic traits. Significant changes of the distribution frequency for the same introgression loci between BC1F2 and BC1F2-F7 populations were observed, and seven selective advantage loci from A. tauschii (Xgdm128-3D, Xgdm8-3D, Xgdm72-3D, Xgwm341-3D, Xgdm63-5D, Xgdm132-6D and Xgdm36-6D) were found, which introgression loci distribution frequency increased from 29.69 to 53.91% (BC1F2) to 94.22 to 100% (BC1F2-F7). The selective advantage loci could be used to evaluate the desirable genes or traits derived from A. tauschii SQ-214.

 

Key words: Aegilops tauschii, Triticum aestivum, introgression locus.

Abbreviation

CS, Chinese Spring, SSR, simple sequence repeat.

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This article is published under the terms of the Creative Commons Attribution License 4.0

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