Fuente: WIPO "tomato" 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.