Identification and comparative mapping of a dominant potyvirus resistance gene cluster in Capsicum |
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| Authors: | R C Grube J R Blauth MS Arnedo Andrés C Caranta M K Jahn |
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| Institution: | (1) Department of Plant Breeding and Biometry, Cornell University, Ithaca, NY 14853, USA e-mail:mmk9@cornell.edu Tel.: +1607-255-8147 Fax: +1607-255-6683, Present address: J.R. Blauth, Department of Biology, University of Redlands, Redlands, CA 92373, USA, US;(2) Servicio de Investigación Agroalimentaria, Apartado 727, E-50080, Zaragoza, Spain, ES;(3) Station de Génétique et d’Amélioration des Fruits et Légumes, INRA, Dom. St. Maurice, BP94, 84143 Montfavet Cedex, France, FR |
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| Abstract: | The dominant gene Pvr7 from Capsicum chinense Jacq. ’PI159236’ confers resistance to the pepper mottle potyvirus (PepMoV) Florida (V1182) strain. This gene is tightly linked
to the dominant potyvirus resistance gene Pvr4 with observed recombination frequencies of 0.012 to 0.016. A cleaved amplified polymorphic sequence (CAPS) marker linked
to Pvr4 was used to localize Pvr4 and, by extension, Pvr7, to linkage group 10 on an interspecific map of pepper. Our results indicated that Pvr4, Pvr7, and Tsw, a gene conferring resistance to tomato spotted wilt virus, comprise the first identified cluster of dominant disease resistance
genes in Capsicum L. This position does not correspond to the locations of dominant potyvirus resistance genes in potato or to the positions
of any other mapped solanaceous resistance genes or resistance gene homologues.
Received: 20 September 1999 / Accepted: 21 March 2000 |
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| Keywords: | PVY TEV Lycopersicon Solanum Solanaceae |
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