Resistance to cucumber green mottle mosaic virus in
Cucumber plants ( Cucumis sativus ) exhibiting increased resistance to Cumber Green Mottle Mosaic Virus (CGMMV) are provided, together with methods of producing, identifying, or selecting plants or germplasm with a CGMMV resistance phenotype. Such plants include cucumber plants comprising recombinant chromosomal segments conferring CGMMV resistance. Compositions, including novel polymorphic markers for detecting plants comprising introgressed virus resistance alleles, are further provided.
1. An agronomically elite Cucumis sativus plant comprising a recombinant chromosomal segment on chromosome 1 and a recombinant chromosomal segment on chromosome 5, wherein said recombinant chromosomal segment on chromosome 5 confers increased resistance to Cucumber Green Mottle Mosaic Virus (CGMMV) relative to a Cucumis sativus plant that lacks said recombinant chromosomal segment, and wherein said recombinant chromosomal segment on chromosome 1 confers increased resistance to CGMMV in a Cucumis sativus plant that comprises said recombinant chromosomal segment on chromosome 5 relative to a Cucumis sativus plant that comprises the recombinant chromosomal segment on chromosome 5 and lacks said recombinant chromosomal segment on chromosome 1, wherein said recombinant chromosomal segment on chromosome 1 comprises marker locus CGMMV_M6 (SEQ ID NO: 26), and wherein said recombinant chromosomal segment on chromosome 5 comprises marker locus CGMMV_M3 (SEQ ID NO: 11).
2. The plant of claim 1 , wherein said recombinant chromosomal segment on chromosome 1 or said recombinant chromosomal segment on chromosome 5 comprises an allele conferring said increased resistance to CGMMV that is obtainable from Cucumis sativus accession Cornell Chinese Long, a representative sample of seed of said accession having been deposited under ATCC Accession No. PTA-126674.
3. The plant of claim 1 , wherein said recombinant chromosomal segment on chromosome 1 that confers resistance to CGMMV is located between 1,723,554 bp and 2,141,985 bp on chromosome 1 of the public cucumber genome v2 map and wherein said recombinant chromosomal segment on chromosome 5 that confers resistance to CGMMV is located between 5,704,478 bp and 6,345,266 bp on chromosome 5 of the public cucumber genome v2 map.
4. The plant of claim 1 , wherein said recombinant chromosomal segment on chromosome 1 lacks a deleterious allele genetically linked thereto that confers to the plant a leaf vein necrosis phenotype when present, and wherein said recombinant chromosomal segment on chromosome 1 lacks a donor plant allele at marker locus CGMMV_M7 (SEQ ID NO: 31) or marker locus CGMMV_M8 (SEQ ID NO: 36).
5. The plant of claim 1 , defined as an inbred or hybrid plant.
6. A seed that produces the plant of claim 1 .
7. A plant part of the plant of claim 1 , wherein said plant part comprises the recombinant chromosomal segment on chromosome 1 and the recombinant chromosomal segment on chromosome 5.
8. The plant part of claim 7 , wherein the part is selected from a stem, petiole, cotyledon, flower, anther, pollen, ovary, root, root tip, protoplast, ovule, shoot, embryo, embryo sac, bud, leaf, meristem or cell.
9. The plant of claim 1 , wherein said recombinant chromosomal segment on chromosome 1 further comprises a marker locus selected from marker locus CGMMVM4 (SEQ ID NO: 16) or marker locus CGMMV_M5 (SEQ ID NO: 21) and wherein said recombinant chromosomal segment on chromosome 5 further comprises a marker locus selected from CGMMV_M1(SEQ ID NO: 1) or marker locus CGMMVM2 (SEQ ID NO: 6) on chromosome 5.