Characterization of a grape variety'Koshu' through comparative genomic hybridization and transcriptomic analysis

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Genomic structure of 'Koshu' was more closely related with oriental Vitis vinifera cultivars than with occidental cultivars and largely different from that of a wild grape species. Even though the genome of 'Koshu' contained a limited number of characteristically different sequences, these differences probably do not influence the character of 'Koshu'. Transcriptomic analysis revealed that the expression of some disease resistance and stress response related genes in the berry skin of 'Koshu' during ripening was higher than in 'Chardonnay'.