Saturation and mapping of a major Fusarium head blight resistance QTL on chromosome 3BS of Sumai 3 wheat
文献类型： 外文期刊
作者： Zhou, M-P. 1 ; Hayden, M. J. 2 ; Zhang, Z-Y. 3 ; Lu, W-Z. 1 ; Ma, H-X. 1 ;
作者机构： 1.Jiangsu Acad Agr Sci, Inst Biotechnol, Nanjing 210014, Peoples R China
2.PMBI, Mol Plant Breeding CRC, Glen Osmond, SA, Australia
3.Chinese Acad Sci, Inst Crop Sci, Beijing 100864, Peoples R China
关键词： phenotypic variation;quantitative trait locus;sequence tagged site;sequence tagged microsatellite
期刊名称：JOURNAL OF APPLIED GENETICS （ 影响因子：3.24； 五年影响因子：2.756 ）
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收录情况： SCI
摘要： Fusarium head blight (FHB) is a destructive disease in wheat. The major quantitative trait locus (QTL) on 3BS from Sumai 3 and its derivatives has been used as a major Source of the resistance to FHB worldwide, but the discrepancy in reported location of the major QTL could block its using in map based cloning and marker assisted selection. In this study, Chinese Spring-Sumai 3 chromosome 3B substitution line was used as resistant parent of the mapping population to reduce the confounded effect of genetic background in Sumai 3. The major QTL region was saturated with the Sequence Tagged Microsatellite (STM) and Sequence Tagged Site (STS) markers. A linkage map of chromosome 313 with 36 markers covering a genetic distance of 112.4 cM was constructed. Twelve new markers were inserted into the chromosome region where the major QTL was located. The average interval distance between markers was 1.5 cM. Multiple QTL Models (MQM) mapping indicated that the major QTL was located in the interval of Xgwm533-Xsts9-1, and explained 45.6% of phenotypic variation of the resistance to FHB. The SSR (simple sequence repeat) marker Xgwm533 and STM marker Xstm748tcac are closely linked to the major QTL.
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