A new powdery mildew resistance allele at the Pm4 wheat locus transferred from einkorn (Triticum monococcum)

被引：71
作者：
Schmolke, Michael [1 ]
Mohler, Volker [2 ]
Hartl, Lorenz [2 ]
Zeller, Friedrich J. [1 ]
Hsam, Sai L. K. [1 ]
机构：
[1] Tech Univ Munich, D-85354 Freising Weihenstephan, Germany
[2] Bavarian State Res Ctr Agr, Inst Crop Sci & Plant Breeding, D-85354 Freising Weihenstephan, Germany
来源：
MOLECULAR BREEDING | 2012年 / 29卷 / 02期
关键词：
Blumeria graminis; Triticum aestivum; Monosomic analysis; Molecular mapping; Resistance genes; COMMON WHEAT; MARKERS; GENES; IDENTIFICATION; GENOME; MAP;
D O I：
10.1007/s11032-011-9561-2
中图分类号：
S3 [农学（农艺学）];
学科分类号：
0901 ;
摘要：
Powdery mildew is one of the most destructive foliar diseases of wheat. A set of differential Blumeria graminis f.sp. tritici (Bgt) isolates was used to test the powdery mildew response of a Triticum monococcum-derived resistant hexaploid line, Tm27d2. Segregation analysis of 95 F-2:3 lines from a Chinese Spring/Tm27d2 cross revealed that the resistance of Tm27d2 is controlled by a single dominant gene. Using monosomic analysis and a molecular mapping approach, the resistance gene was localized to the terminal end of chromosome 2AL. The linkage map of chromosome 2AL consisted of nine simple sequence repeat markers and one sequence-tagged site (STS) marker (ResPm4) indicative for the Pm4 locus. According to the differential reactions of 19 wheat cultivars/lines with known powdery mildew resistance genes to 13 Bgt isolates, Tm27d2 carried a new resistance specificity. The complete association of the resistance allele with STS marker ResPm4 indicated that it represented a new allele at the Pm4 locus. This new allele was designated Pm4d. The two flanking markers Xgwm526 and Xbarc122 closely linked to Pm4d at genetic distances of 3.4 and 1.0 cM, respectively, are present in chromosome bin 2AL1-0.85-1.00.
引用
收藏
页码：449 / 456
页数：8
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