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Agronomy 2015, 5(4), 555-568; doi:10.3390/agronomy5040555

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

1
Department of Plant & Soil Sciences, University of Kentucky, Lexington, KY 40546, USA
2
Department of Plant Genetics and Breeding, Shandong Agricultural University, Shandong 271018, China
3
Kentucky Tobacco Research & Development Center, University of Kentucky, Lexington, KY 40546, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Diego Rubiales
Received: 15 July 2015 / Revised: 20 November 2015 / Accepted: 23 November 2015 / Published: 27 November 2015
(This article belongs to the Special Issue Breeding for Disease Resistance)
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Abstract

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. View Full-Text
Keywords: tobacco; blue mold; disease resistance; genetic marker tobacco; blue mold; disease resistance; genetic marker
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Wu, X.; Li, D.; Bao, Y.; Zaitlin, D.; Miller, R.; Yang, S. Genetic Dissection of Disease Resistance to the Blue Mold Pathogen, Peronospora tabacina, in Tobacco. Agronomy 2015, 5, 555-568.

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