| 2 | QTL molecular marker location of powdery mildew resistance in cucumber (Cucumis sativus L.)显示文摘The cucumber lines, S94 (Northern China open-field type, powdery mildew (PM) susceptible) and S06 (European greenhouse type, PM resistant), and their F6:7 populations were used to investigate PM re-sistance under seedling spray inoculation in 2005/Autumn and 2006/Spring. QTL analysis was under-taken based on a constructed molecular linkage map of the corresponding F6 population using com-posite interval mapping. A total of four QTLs (pm1.1, pm2.1, pm4.1 and pm6.1) for PM resistance were identified and located on LG 1, 2, 4 and 6, respectively, explaining 5.2%-21.0% of the phenotypic variation. Three consistent QTLs (pm1.1, pm2.1 and pm4.1) were detected under the two test conditions. The QTL pm6.1 was only identified in 2005/Autumn. The total phenotypic variation explained by the QTLs was 52.0% and 42.0% in 2005/Autumn and 2006/Spring, respectively. Anchor markers tightly linked to those loci (<5 cM) could lay a basis for both molecular marker-assisted breeding and map-based gene cloning of the PM-resistance gene in cucumber. | LIU LongZhou1,2, CAI Run1, YUAN XiaoJun1, HE HuanLe1 & PAN JunSong1 1 School of Agriculture and Biology, Shanghai Jiaotong University, Shanghai 200240, China 2 Horticultural Research Institute, Shanghai Academy of Agricultural Sciences( (SAAS)), Shanghai Key Lab of Protected Horti-cultural Technology, Shanghai, 201106, China | 2008 | Science China(Life Sciences)2008，51，11： | 2 |
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