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AssigneeSeminis Vegetable Seeds, Inc.
InventorsKelli M. Durham, Susana García Andrés, Maria Dolores Hernandez, Scott J. Huesgen, Andrea K. Knox, Bram Rozier, Menno Ter Maat, Sjoerd van der Ent, Ruth A. Wagner
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The present disclosure provides cultivated tomato plants exhibiting increased resistance to Mi-1 resistance-breaking root-knot nematodes. Such plants comprise novel recombinant chromosomal segments comprising alleles associated with disease resistance from Solanum pimpinellifolium on chromosome 1 and/or chromosome 6. In certain aspects, compositions and methods for producing, breeding, detecting, and selecting plants or germplasm with an increased disease resistance phenotype are provided.
A cultivated tomato plant comprising a recombinant chromosomal segment on chromosome 1 from Solanum pimpinellifolium on chromosome 1, wherein said recombinant chromosomal segment comprises an allele that confers increased resistance to Mi-1 resistance-breaking root-knot nematode species relative to a plant lacking said recombinant chromosomal segment, wherein said Mi-1 resistance-breaking root-knot nematode species resistance allele is located between 82,703,136 bp and 83,446,695 bp on chromosome 1 of the public tomato genome sequence SL3.0, and wherein said recombinant chromosomal segment comprises a marker locus selected from the group consisting of marker locus M2 (SEQ ID NO:1), marker locus M11 (SEQ ID NO:6), marker locus M12 (SEQ ID NO:7), marker locus M13 (SEQ ID NO:8), and marker locus M3 (SEQ ID NO:9).
A method for producing a cultivated tomato plant with improved resistance to Mi-1 resistance-breaking root-knot nematode species, comprising introgressing into said plant a Mi-1 resistance-breaking root-knot nematode species resistance allele from chromosome 1 of Solanum pimpinellifolium within a recombinant chromosomal segment flanked in the genome of said plant by marker locus M2 (SEQ ID NO:1) and marker locus M3 (SEQ ID NO:9) on chromosome 1, wherein said introgressed Mi-1 resistance-breaking root-knot nematode species resistance allele confers to said plant resistance to Mi-1 resistance-breaking root-knot nematode species relative to a plant lacking said allele.
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