Molecular detection of a gene effective against powdery mildew in the wheat cultivar Liangxing 66
文献类型: 外文期刊
第一作者: Huang, Jiang
作者: Huang, Jiang;Xu, Hongxing;An, Diaoguo;Huang, Jiang;Zhao, Zihui;Song, Fengjing;Wang, Xiaoming;Huang, Yan;Li, Hongjie;Huang, Jiang;Huang, Yan
作者机构:
关键词: Triticum aestivum L.;Liangxing 66;Molecular mapping;Powdery mildew;Pm2
期刊名称:MOLECULAR BREEDING ( 影响因子:2.589; 五年影响因子:2.75 )
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收录情况: SCI
摘要: Since it was commercialized in 2008, Liangxing 66 is one of the most widely grown cultivars of wheat (Triticum aestivum L.) in winter and facultative wheat-producing regions in northern China. This cultivar displays broad-spectrum resistance to isolates of powdery mildew. To identify the powdery mildew resistance gene in Liangxing 66, genetic analysis and molecular mapping were conducted using the F2 populations and F2:3 families derived from the reciprocal crosses of Liangxing 66 and the susceptible cultivar Jingshuang 16. A single dominant gene, tentatively designated PmLX66, conferred resistance in Liangxing 66 to the powdery mildew isolate E09. The results of molecular mapping indicated that this gene was located on the short arm of chromosome 5D and flanked by SCAR203 and Xcfd81 at genetic distances of 0.4 and 2.8 cM, respectively, which is similar to the position of locus Pm2. However, PmLX66 and Pm2 showed different reactions to five of the 42 isolates of powdery mildew tested. Together, these results indicated that PmLX66 was most likely an allele of Pm2. Based on its superior yield and agronomic performance, in combination with powdery mildew resistance, Liangxing 66 is useful as a promising parent for control of powdery mildew and for the development of new disease-resistant cultivars.Digital Object Identifier http://dx.doi.org/10.1007/s11032-012-9757-0
分类号: Q94
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