The present invention relates to a genetic determinant which may comprise at least two copies of a combination of two closely linked RDR1 genes, which two closely linked RDR1 genes are inversely oriented, and which genetic determinant leads to virus resistance when present in a plant. In one embodiment, of the RDR1 genes in the combination is represented by SEQ ID No. 1 or has at least 70% sequence identity, and one of the RDR1 genes in the combination is represented by SEQ ID No. 3 or has at least 70% sequence identity; or one of the RDR1 genes in the combination encodes a protein represented by SEQ ID No. 2 or a protein that has at least 70% sequence identity, and one of the RDR1 genes encodes a protein represented by SEQ ID No. 4 or a protein that has at least 70% sequence identity.

Tomato plants exhibiting resistance to tomato chlorosis virus and Fusarium oxysporum f. sp. lycopersici race 2 are provided, together with methods of producing, identifying, or selecting plants or germplasm with a tomato chlorosis virus and Fusarium oxysporum f. sp. lycopersici race 2 resistance phenotype and lacking an undesirable cold sensitivity trait. Such plants include tomato plants comprising recombinant genomic regions conferring disease resistance. Compositions, including novel polymorphic markers for detecting plants comprising introgressed disease resistance alleles, are further provided.

The present invention relates to the field of melon plants having a dominant Melon Yellowing associated Virus (MYaV) resistance gene in their genome, introgressed from wild melon accessions.

The invention relates to the field of tobacco breeding, particularly to a tobacco plant resistant to TSWD without linkage drag and a method for breeding the same. Provided is a tobacco plant or germplasm resistant to TSWD, which comprises a short RTSW introgressed segment, wherein at least part or entire of the sequence set forth in SEQ ID No.34 is deleted in the short RTSW introgressed segment as compared to the RTSW introgressed segment of tobacco Polalta. Also provided is a method for screening said tobacco plant or germplasm, in which a tobacco plant or germplasm resistant to TSWD carrying a short RTSW introgressed segment is obtained by detecting NaChr4_2M, NaChr4_8M, NaChr3_62.6M and NaChr3_64.6M linkage drag locus markers. Compared with Polalta, the tobacco plant or germplasm provided by the invention not only has TSWD resistance, but also reduces or removes linkage drag.

The present invention relates to a plant comprising a modified Tom2a gene, the wildtype of which comprises SEQ ID No. 1, SEQ ID No. 2, SEQ ID No. 3, SEQ ID No. 4, SEQ ID No. 5, or SEQ ID No. 6, or comprises another homologous sequence having at least 70% sequence identity to SEQ ID No. 1, which modified gene leads to increased resistance to a Tobamovirus. The modification in the Tom2a gene leads to a modified Tom2a protein that has a deletion, a substitution, or an insertion of at least one amino acid when compared to SEQ ID No. 7, SEQ ID No. 8, SEQ ID No. 9, SEQ ID No. 10, SEQ ID No. 11, or SEQ ID No. 12, or compared to another homologous sequence having at least 70% sequence similarity to SEQ ID No. 7. The plant is preferably a plant of the family Cucurbitaceae or Solanaceae. The invention further relates to a modified Tom2a gene encoding a Tom2a protein comprising a deletion, a substitution, or an insertion of at least one amino acid when compared to SEQ ID No. 7, SEQ ID No. 8, SEQ ID No. 9, SEQ ID No. 10, SEQ ID No. 11, or SEQ ID No. 12, or compared to another homologous sequence having at least 70% sequence similarity to SEQ ID No. 7.

The present invention relates to plant of the species Cucumis melo, said plant comprising a genetic element derived from a plant of the species Cucumis melo var. agrestis, which genetic element comprises a closterovirus-resistance-conferring QTL or a closterovirus-resistance-conferring part thereof linked to at least one marker located on the chromosome equivalent to linkage group (LG) 6 of melon accession PI 313970, wherein said plant is not melon accession PI 313970.

A virus-resistant tobacco in accordance with the present invention is such that it includes a mutation in a translation initiation factor eIF(iso)4E gene, the mutation causing production of an eIF(iso)4E protein which is non-functional with respect to a virus or suppressing expression of the eIF(iso)4E gene, or a virus-resistant tobacco in accordance with the present invention is such that an expression level of the eIF(iso)4E gene is 20% or lower as compared to a wild type.

The present invention relates to the field of pepper breeding. Provided are plants which are resistant against a Tsw-resistance breaking pathotype of TSWV. Also provided are plant parts, seeds, cells and fruits thereof and methods to produce such plants.

The present invention relates to the field of agriculture, more particularly to tomato plants harboring dominant resistance to the recently characterized TobamovirusTomato Brown Rugose Fruit Virus. Tobamoviruses are a genus of plant viruses which pose a significant threat to vegetable and ornamental crops around the world. The impact of these viruses on crops can be economically devastating and result in considerable yield losses. The present invention discloses a tomato plant harboring a partially dominant resistance gene/genes to tomato brown rugose fruit virus (ToBRFV). It is another object of the present invention to disclose genetic markers for the use in identification and/or selection of tomato plants harboring partially dominant resistance to tomato brown rugose fruit virus (ToBRFV)

The present invention relates to novel tomato plants displaying an increased resistance to ToBRFV infection. The present invention also relates to seeds and parts of said plants, for example fruits. The present invention further relates to methods of making and using such seeds and plants. The present invention also relates to novel genetic sequences associated with said increased resistance and to molecular markers associated with said novel genetic sequences.