Cyto-morphology and chromosome number worked out for 60 accessions belonging to genera and species of the family Vitaceae show marked variations in their chromosome numbers. Grape cultivars and Vitis species have 2n=38, while in wild types like Ampelopsis, Ampelocissus and Parthenocissus 2n=40 and 80 were encountered. Chromosome numbers of Cissus, Cayratia and Tetrastigma have variations from 2n=22 to 120. These genera have been reclassified based on chromosome numbers like Cissus 2n=24, 48, Cayratia 2n=40, 80, 60 and 120, and Tetrastigma to be 2n=22, 44, 26, 52.
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