Patent ID: 8093455

Claim:
A method of producing a Botrytis -resistant tomato plant, said method comprising the steps of: a) providing a Botrytis -resistant donor tomato plant; b) transferring a nucleic acid from said donor plant to one or more Botrytis -susceptible recipient tomato plants, wherein said transfer results in the introduction of genomic material from the donor plant in the corresponding region of the genome of said one or more recipient plants; and c) selecting from amongst said recipient tomato plants a plant that comprises within its genome at least one quantitative trait loci (QTL) for Botrytis -resistance derived from said Botrytis -resistant donor tomato plant, wherein said selection comprises detecting on chromosome 4, 6, 9, 11 and/or 12 of said recipient tomato plant at least one genetic marker linked to said at least one QTL for Botrytis -resistance, wherein the location of said QTL on chromosome 4 of said plant is indicated by a genomic region comprising the genetic markers CT50, C2At1g74970, P14M49-283e, P14M48-74e, P14M50-67e, CT1739 and P14M50-85h on chromosome 4 of S. habrochaites or on chromosome 4 of S. lycopersicum.