文献类型： 外文期刊

作者： Qian, Yi-liang ¹ ; Wang, Xin-sheng ³ ; Wang, Da-zhou ³ ; Zhang, Li-na ¹ ; Zu, Chao-long ² ; Gao, Zheng-liang ² ; Zhang ¹ ;

作者机构： 1.Anhui Agr Univ, Coll Agr, Hefei 230036, Peoples R China

2.Anhui Acad Agr Sci, Tobacco Res Inst, Hefei 230031, Peoples R China

3.China Natl Tobacco Corp, Anhui Prov Corp, Hefei 230022, Peoples R China

4.Chinese Acad Agr Sci, Inst Crop Sci, Natl Key Facil Crop Gene Resources & Genet Improv, Beijing 100081, Peoples R China

5.Oklahoma State Univ, Stillwater, OK 74078 USA

关键词： Tobacco;Bacterial wilt resistance;Quantitative trait loci;SSR

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

ISSN： 0014-2336

年卷期： 2013 年 192 卷 2 期

页码：

收录情况： SCI

摘要： The bacterial tobacco wilt caused by Ralstonia solanacearum is one of the most destructive soil-borne diseases worldwide. One strategy to improve the resistance to bacterial wilt is to make use of plant varieties expressing wilt resistance genes. To characterize the genetics of wilt resistance and to identify relevant molecular markers for use in plant breeding, quantitative trait loci (QTLs) affecting tobacco bacterial wilt resistance were mapped in the F-2:3 and F-2:4 progeny produced from two crosses between the wilt-resistant breeding lines Enshu and Yanyan97 and the susceptible cultivar TI448A. A linkage map containing 118 loci in 24 linkage groups was constructed for 236 lines from the EnshuxTI448A cross, and a linkage map containing 96 loci in 24 linkage groups was constructed for 264 lines from the Yanyan97xTI448A cross. The wilt resistance of the progeny was examined in field trials conducted in Xuancheng, China, in 2010, 2011, and 2012. The disease severity was assessed on stems using separate rating scales. Mapmaker/EXP 3.0 and Mapmaker/QTL 1.1 were used to identify the qBWR-3a, qBWR-3b, qBWR-5a and qBWR-5b QTLs in linkage group 3 and 5; these four loci were strongly associated with resistance and explain 9.00, 19.70, 17.30, and 17.40 % of the variance in resistance, respectively. The close linkage of the markers PT20275 and PT30229 was detected in both the TI448AxEnshu and TI448AxYanyan97 crosses, and this linkage group could be used to select individual resistant plants. These findings suggest that one strategy to combat bacterial wilt could be to exploit the resistance genes of the Enshu and Yanyan97 strains.