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Molecular detection of rye (Secale cereale L.) chromatin in wheat line 07jian126 (Triticum aestivum L.) and its association to wheat powdery mildew resistance

文献类型： 外文期刊

作者： Yu, Shuiyang 2 ; Long, Hai 1 ; Yang, Hong 3 ; Zhang, Jie 1 ; Deng, Guangbing 1 ; Pan, Zhifen 1 ; Zhang, Erliang 2 ; Yu, M 1 ;

作者机构： 1.Chinese Acad Sci, Chengdu Inst Biol, Chengdu 610041, Peoples R China

2.Sichuan Normal Univ, Coll Life Sci, Chengdu 610101, Peoples R China

3.Sichuan Acad Agr Sci, Inst Hort, Chengdu 610066, Peoples R China

4.Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China

关键词： Blumeria graminis;Molecular marker;Rye introgression line;Gene resource;Marker-assisted selection

期刊名称：EUPHYTICA （ 影响因子：1.895； 五年影响因子：2.181 ）

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收录情况： SCI

摘要： Powdery mildew (Pm), caused by Blumeria graminis f. sp. tritici (Bgt), is one of the most serious diseases for common wheat in many regions around the world. Seeking for new resistance source is urgently required to meet the challenge of the rapid loss of resistance due to the co-evolution of the pathogen's virulence. Wheat line 07jian126 (Triticum aestivum L.) is highly resistant to the Pm disease prevailing in Sichuan province of China. Previous study showed that a SSR marker Xbarc183 was linked to the Pm resistance in 07jian126, which might be controlled by a single dominant gene, designated as Pm07J126. In this study, two additional F-2 populations were used to confirm the linkage between Pm07J126 and Xbarc183. Furthermore, rye chromatin was detected in 07jian126 by molecular analysis of a rye-specific SCAR marker O5 which co-segregated with Pm07J126. This result indicated that Pm07J126 might originate from rye. The reaction patterns to 21 Bgt isolates and molecular marker analysis implied that Pm07J126 might be different from the known rye-derived Pm genes Pm7, Pm8, Pm17 and PmJZHM2RL. Chromosome observation, molecular marker, and A-PAGE analysis suggested that 07jian126 might be a rye introgression line and neither contain 1RS translocation nor secalins gene. Consequently, 07jian126 could be considered as a valuable resource for Pm resistance development of wheat. Besides, the molecular markers Xbarc183 and O5 are useful in marker-assisted selection of Pm07J126 in wheat breeding programs.

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