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Euphytica

, Volume 207, Issue 3, pp 619–626 | Cite as

Identification and mapping of PmSE5785, a new recessive powdery mildew resistance locus, in synthetic hexaploid wheat

  • Yajuan Wang
  • Changyou Wang
  • Wei Quan
  • Xiujuan Jia
  • Ying Fu
  • Hong Zhang
  • Xinlun Liu
  • Chunhuan Chen
  • Wanquan JiEmail author
Article

Abstract

Powdery mildew of wheat (Triticum aestivum L.) caused by Blumeria graminis f. sp. tritici, is a major fungal disease in many areas of the world. Synthetic hexaploids, created from durum wheat and Aegilops tauschii are important sources of beneficial genes for wheat improvement. Synthetic wheat ‘SE5785’ was found resistant to powdery mildew at the seedling and adult stages. Genetic analyses of the F2 population and F2:3 families developed from a cross of ‘SE5785’ with the susceptible common wheat, ‘Xiaoyan 22’, revealed that resistance in ‘SE5785’ was controlled by a single recessive gene. Bulked segregant analysis was used to map the powdery mildew resistance locus. The resulting genetic map comprised of markers Xcfd62, Xbarc59, PmSE5785, Xgwm539, and Xwmc817 spanned 16.3 cM. Markers Xbarc59 and Xgwm539 were tightly linked to the resistance locus at genetic distances of 3.6 and 4.0 cM, respectively. ‘Chinese Spring’ and its nulli-tetrasomic lines confirmed that PmSE5785 was located on chromosome 2D. Because no gene for powdery mildew resistance had ever been located on this chromosome in the genus Triticum, this must be a new locus, therefore, designated PmSE5785. N07228-1 and N07228-2 with large seeds and powdery mildew resistance were selected from the progeny of the cross ‘SE5785’/‘Xiaoyan 22’. These new lines can serve as sources of resistance to powdery mildew in wheat breeding.

Keywords

Synthetic hexaploid wheat Powdery mildew Resistance gene Genetic mapping Germplasm use 

Notes

Acknowledgments

This research was supported by the innovation project of science and technology of Shaanxi province of China (2015KTZDNY01-01-02), the Key Technologies R&D Program of China (2013BAD01B02-6) and the Zhongying Tang Breeding Fund of Northwest A & F University (2014-2015).

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Copyright information

© Springer Science+Business Media Dordrecht 2015

Authors and Affiliations

  • Yajuan Wang
    • 1
  • Changyou Wang
    • 1
  • Wei Quan
    • 1
  • Xiujuan Jia
    • 1
  • Ying Fu
    • 1
  • Hong Zhang
    • 1
  • Xinlun Liu
    • 1
  • Chunhuan Chen
    • 1
  • Wanquan Ji
    • 1
    Email author
  1. 1.State Key Laboratory of Crop Stress Biology for Arid Areas, College of AgronomyNorthwest A&F UniversityYanglingChina

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