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. 1993 Nov 26;262(5138):1432-6.
doi: 10.1126/science.7902614.

Map-based cloning of a protein kinase gene conferring disease resistance in tomato

G B Martin  1 , S H Brommonschenkel, J Chunwongse, A Frary, M W Ganal, R Spivey, T Wu, E D Earle, S D Tanksley
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Map-based cloning of a protein kinase gene conferring disease resistance in tomato

G B Martin et al. Science. .

Abstract

The Pto gene in tomato confers resistance to races of Pseudomonas syringae pv. tomato that carry the avirulence gene avrPto. A yeast artificial chromosome clone that spans the Pto region was identified and used to probe a leaf complementary DNA (cDNA) library. A cDNA clone was isolated that represents a gene family, at least six members of which genetically cosegregate with Pto. When susceptible tomato plants were transformed with a cDNA from this family, they were resistant to the pathogen. Analysis of the amino acid sequence revealed similarity to serine-threonine protein kinases, suggesting a role for Pto in a signal transduction pathway.

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