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Acta Agron Sin ›› 2013, Vol. 39 ›› Issue (02): 191-197.doi: 10.3724/SP.J.1006.2013.00191

• CROP GENETICS & BREEDING·GERMPLASM RESOURCES·MOLECULAR GENETICS •     Next Articles

Molecular and Cytogenetic Identification of Triticum aestivumLeymus racemosus Translocation Lines T7BS•7Lr#1S and T2AS•2AL-7Lr#1S

CUI Cheng-Qi1,WANG Lin-Sheng1,2,CHEN Pei-Du1,*   

  1. 1 State Key Laboratory of Crop Genetics and Germplasm Enhancement, Cytogenetics Institute, Nanjing Agricultural University, Nanjing 210095, China;
    2 College of Agriculture, Henan University of Science and Technology, Luoyang 471003, China
  • Received:2012-07-08 Revised:2012-10-05 Online:2013-02-12 Published:2012-12-11
  • Contact: 陈佩度, E-mail: pdchen@njau.edu.cn

Abstract:

A resistance gene against wheat scab is located on chromosome 7Lr#1S of Leymus racemosus, which is propitious to enriching scab resistance resources and resistant breeding in wheat (Triticum aestivum L.).The translocation lines NAU639 (T7BS·7Lr#1S) and NAU640 (T2AS·2AL-7Lr#1S) were selected from the plant progenies of irradiated pollens of monosomic alien addition line MA7Lr#1 and confirmed through chromosome FISH-GISH, C-banding, and molecular markers analyses. The two translocation lines had higher resistance to wheat scab than the susceptible parent “Chinese Spring” and the susceptible controls “Mianyang 8545” and “Shimai 4185” in a successive three-year test both in the greenhouse and field. These results showed the stable scab resistance in translocation lines NAU639 and NAU640 and feasibility to be used as a new source in wheat breeding resistant to scab disease.

Key words: Triticum aestivum, Leymus racemosus, Translocation line, Molecular and cytogenetics, Scab resistance

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