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Acta Agron Sin ›› 2010, Vol. 36 ›› Issue (08): 1393-1400.doi: 10.3724/SP.J.1006.2010.01393

• RESEARCH ACTIVITIES • Previous Articles     Next Articles

Leaf Rust Resistance in 27 Diploids and 10 Tetraploids of Wheat Relatives

 YUAN Jun-Hai1,2,CHEN Wan-Quan1*   

  1. 1 State Key Laboratory for Biology of Plant Diseases and Insect Pests / Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China; 2 Department of Agronomy, Hebei North University, Xuanhua 075131, China
  • Received:2010-01-22 Revised:2010-03-01 Online:2010-08-12 Published:2010-06-11
  • Contact: CHEN Wan-Quan,E-mail:wqchen112@ippcaas.cn

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Abstract: Resistance of 37 accessions of wheat relatives, including 27 accessions of diploid and 10 accessions of tetraploid, to 5 prevalent pathotypes of Puccinia triticina was identified in the field at adult plant stage. Three accessions of Triticum tauschii, one accession of T. dicoccoides, and 3 accessions of T. durum exhibited immunity and one accession of T. monococcm, nine accessions of T. tauschii, and one accession of T. durum were resistant to the pathotypes. This result suggests that the resistance genes involved in these resources are of great value. Based on infection types (ITs), leaf rust resistance gene(s) for the 37 relatives were also postulated with eighteen differential pathotypes under different temperatures at seedling stage. In T. tauschii accessions, Y192 might carry Lr40; Ae37 and Y190 might carry Lr41. Four accessions of durum wheat, i.e. Altar 84, Doliu, Dr147, and Volcani 447, might carry Lr23 and unknown Lr gene(s). There were no putative Lr genes in 10 accessions of T. tauschii, such as Ae39, T96243 and Y193, and T. dicoccoides. At adult plant stage, Ae39, T96243, and Y193 showed ITs from “I” to “R”, with the severity less than 10%. This indicates that those materials probably possess adult plant resistance (APR) against Puccinia triticina.

Key words: Wheat, Diploid, Tetraploid, Leaf rust resistance gene, Gene postulation

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