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.

The present invention provides: a root-knot nematode resistance marker for tomato plants; a novel root-knot nematode resistant tomato plant; a method for producing a root-knot nematode resistant tomato plant; and a screening method for a root-knot nematode resistant tomato plant.

The present invention relates to methods and compositions for identifying, selecting and/or producing a soybean plant or germplasm having root knot nematode resistance. A soybean plant, part thereof and/or germplasm, including any progeny and/or seeds derived from a soybean plant or germplasm identified, selected and/or produced by any of the methods of the present invention is also provided.

The present invention relates to tropical root-knot nematode resistant carrot plants comprising a first tropical root-knot nematode resistance providing genomic fragment. The present invention further relates to methods for identifying tropical root-knot nematode resistant carrot plants, methods for providing tropical root-knot nematode resistant carrot plants and means for identifying tropical root-knot nematode resistant carrot plants.

A nucleic acid encoding an MeR1 protein, which confers resistance to root-knot nematode when present in a Solanaceae plant is provided. Said nucleic acid has a nucleotide sequence that may comprise a coding sequence according to SEQ ID NO: 2, 3, 4, 5, 6, 7, 8 or 9, or a coding sequence having at least 90% sequence identity with SEQ ID NO: 2, 3, 4, 5, 6, 7, 8 or 9; or a nucleotide sequence encoding a protein having an amino acid sequence according to SEQ ID NO: 10, 11, 12, 13, 14, 15, 16 or 17, or a protein having an amino acid sequence having at least 85% sequence identity with SEQ ID NO: 10, 11, 12, 13, 14, 15, 16 or 17. The invention further relates to plants and seeds which may comprise the nucleic acid, methods for making and identifying such plants and use of the nucleic acid.