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Proc Natl Acad Sci U S A. 2012 Jul 17;109(29):11872-7. doi: 10.1073/pnas.1205415109. Epub 2012 Jul 2.

The genome of melon (Cucumis melo L.).

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  • 1Institut de Recerca i Tecnologia Agroalimentàries, Centre for Research in Agricultural Genomics Consejo Superior de Investigaciones Científicas-Institut de Recerca i Tecnologia Agroalimentàries-Universitat Autònoma de Barcelona-Universitat de Barcelona, 08193 Barcelona, Spain. jordi.garcia@irta.cat

Abstract

We report the genome sequence of melon, an important horticultural crop worldwide. We assembled 375 Mb of the double-haploid line DHL92, representing 83.3% of the estimated melon genome. We predicted 27,427 protein-coding genes, which we analyzed by reconstructing 22,218 phylogenetic trees, allowing mapping of the orthology and paralogy relationships of sequenced plant genomes. We observed the absence of recent whole-genome duplications in the melon lineage since the ancient eudicot triplication, and our data suggest that transposon amplification may in part explain the increased size of the melon genome compared with the close relative cucumber. A low number of nucleotide-binding site-leucine-rich repeat disease resistance genes were annotated, suggesting the existence of specific defense mechanisms in this species. The DHL92 genome was compared with that of its parental lines allowing the quantification of sequence variability in the species. The use of the genome sequence in future investigations will facilitate the understanding of evolution of cucurbits and the improvement of breeding strategies.

PMID:
22753475
[PubMed - indexed for MEDLINE]
PMCID:
PMC3406823
Free PMC Article

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