文献类型： 外文期刊

作者： Zhang, X. ¹ ; Peng, G. ² ; Parks, P. ¹ ; Hu, B. ³ ; Li, Q. ³ ; Jiang, L. ⁴ ; Niu, Y. ⁵ ; Huang, S. ¹ ; Fernando, W. G. D. ¹ ;

作者机构： 1.Univ Manitoba, Dept Plant Sci, 66 Dafoe Rd, Winnipeg, MB R3T 2N2, Canada

2.Agr & Agri Food Canada, Saskatoon Res Ctr, 107 Sci Pl, Saskatoon, SK S7N 0X2, Canada

3.Anhui Acad Agr Sci, Crop Res Inst, Hefei 230031, Peoples R China

4.Sichuan Acad Agr Sci, Crop Sci Inst, Chengdu 610066, Sichuan, Peoples R China

5.Sichuan Agr Univ, Rapeseed Res Ctr, Chengdu 611130, Sichuan, Peoples R China

关键词： blackleg;Brassica napus;disease resistance;Leptosphaeria maculans

期刊名称：PLANT PATHOLOGY （ 影响因子：2.59； 五年影响因子：2.924 ）

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收录情况： SCI

摘要： Blackleg disease of canola/rapeseed (Brassica napus), caused by the devastating fungal pathogen Leptosphaeria maculans, can significantly influence B. napus production worldwide, except for China, where only the less aggressive L. biglobosa has been found associated with the disease. The aim of this study was to characterize both seedling resistance (major gene resistance, R gene resistance) and adult plant resistance (APR) from a collection of Chinese B. napus varieties/lines (accessions) to L. maculans. Evaluation of seedling resistance was carried out under a controlled environment, using 11 well-characterized L. maculans isolates as differentials. The identification of APR was performed under multiple field environments in western Canada. R genes were detected in more than 40% of the accessions tested. Four specific R genes, Rlm1, Rlm2, Rlm3 and Rlm4 were identified, with Rlm3 and Rlm4 being the most common genes, while Rlm1 and Rlm2 were detected only occasionally. Results of field evaluation indicated significant variations among field locations as well as accessions; a large portion of the B. napus accessions, regardless of the resistance level observed at the seedling stage, showed high to moderate levels of APR under all environments tested. This study highlights that both R gene resistance and APR are present in Chinese B. napus germplasm and could be potential sources of resistance against blackleg caused by L. maculans if the pathogen ever becomes established in China.