Genetic Dissection of Disease Resistance to the Blue Mold Pathogen, Peronospora tabacina, in Tobacco

Agronomy

Xia Wu¹  Dandan Li¹  Yinguang Bao¹  David Zaitlin²  Robert Miller¹  Shengming Yang¹ 

[1] Department of Plant & Soil Sciences, University of Kentucky, Lexington, KY 40546, USA; E-Mails:;Kentucky Tobacco Research & Development Center, University of Kentucky, Lexington, KY 40546, USA; E-Mail:

关键词: tobacco;    blue mold;    disease resistance;    genetic marker;   

DOI  :  10.3390/agronomy5040555

来源: mdpi

【 摘 要 】

Tobacco blue mold, caused by the obligately biotrophic oomycete pathogen Peronospora tabacina D.B. Adam, is a major foliar disease that results in significant losses in tobacco-growing areas. Natural resistance to P. tabacina has not been identified in any variety of common tobacco. Complete resistance, conferred by RBM1, was found in N. debneyi and was transferred into cultivated tobacco by crossing. In the present study, we characterized the RBM1-mediated resistance to blue mold in tobacco and show that the hypersensitive response (HR) plays an important role in the host defense reactions. Genetic mapping indicated that the disease resistance gene locus resides on chromosome 7. The genetic markers linked to this gene and the genetic map we generated will not only benefit tobacco breeders for variety improvement but will also facilitate the positional cloning of RBM1 for biologists.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.