Tomato plants with improved disease resistance
AssigneeSeminis Vegetable Seeds, Inc.
InventorsDerek R. Drost, Elaine Graham, Albert Grit, Jacobus Hoogstraten, Stephanie Pedroni
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Abstract
The present disclosure provides tomato plants exhibiting resistance to Leveillula taurica (Lt) and lacking traits associated with linkage drag such as an undesirable orange fruit exocarp color. Such plants may comprise novel introgressed genomic regions associated with disease resistance from S. chilense. In certain aspects, compositions, including novel polymorphic markers and methods for producing, breeding, identifying, and selecting plants or germplasm with a disease resistance phenotype are provided.
Claims26
A tomato plant of a cultivated tomato plant variety comprising a recombinant introgression from Solanum chilense on chromosome 12, wherein said recombinant introgression comprises a first allele conferring improved resistance to Leveillula taurica (Lt) relative to a plant lacking said first allele, and wherein said recombinant introgression lacks a second allele from Solanum chilense genetically linked to said first allele, wherein the second allele would confer orange fruit exocarp if present in said recombinant introgression, and wherein said first allele comprises alleles from Solanum chilense at locus NL0235199 and at locus NL0235118 and said second allele lacks alleles from Solanum chilense at locus NL0235137 and at locus NL0244887.
A method for obtaining a tomato plant exhibiting improved resistance to Leveillula taurica (Lt) comprising:
- (a) obtaining a tomato plant heterozygous for a first allele that confers resistance to Leveillula taurica (Lt) and that is genetically linked in the plant to a second allele from Solanum chilense that confers orange fruit exocarp color;
- (b) crossing the plant of step (a) with itself or a second tomato plant to produce progeny of the plant of step (a);
- and
- (c) selecting at least a first progeny plant in which recombination has occurred such that the progeny comprises a recombinant introgression from Solanum chilense on chromosome 12, wherein said recombinant introgression comprises a first allele conferring improved resistance to Leveillula taurica (Lt) relative to a plant lacking said first allele, and wherein said recombinant introgression lacks a second allele from Solanum chilense that would confer orange fruit exocarp if present in said recombinant introgression, and wherein said first allele comprises alleles from Solanum chilense at locus NL0235199 and at locus NL0235118 and said second allele lacks alleles from Solanum chilense at locus NL0235137 and at locus NL0244887.
Dependencies are inferred from the claim text.