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Title

Analysis of the melon genome in regions encompassing TIR-NBS-LRR resistance genes

AuthorsVan Leeuwen, H.; García-Mas, Jordi ; Coca, María ; Puigdomènech, Pere ; Monfort, Amparo
Issue Date2005
PublisherSpringer
CitationMolecular Genetics and Genomics 273: 240- 251 (2005)
AbstractPlant genomes contain numerous genes (R-genes) that play a role in initiating defence measures against their particular pathogens. Defence mechanisms controlled by R-genes have been the focus of extensive research over the past several years. The majority of the R-genes described so far belong to a super-family of genes (150-600 members) that encode proteins with a nucleotide binding site (NBS), some leucine-rich repeats (LRR) and an N-terminal domain that shows similarity to the Toll and Interleukin-1 receptors (TIR) or a N-terminal coiled-coil (CC) domain. Analysis of four regions of the melon (Cucumis melo) genome, including two sequenced BACs, identified 14 TIR-NBS-LRR genes. Known disease resistance genes have been mapped in three of these regions. Transcriptional expression was detected for predicted genes that are possibly involved in defence responses to pathogen attack. TIR-NBS-LRR genes appear to be clustered in the melon genome. They contain all the conserved motifs that have previously been described for their counterparts in other species, although differences were also detected. The results presented here may contribute to a better understanding of the genomic distribution and evolution of this group of resistance gene homologues and their variability. © Springer-Verlag 2005.
URIhttp://hdl.handle.net/10261/97542
DOI10.1007/s00438-004-1104-7
Identifiersdoi: 10.1007/s00438-004-1104-7
issn: 1617-4615
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