A report on new chromosome number of three Dioscorea species
2019
Chiranjit Paul (Plant Diversity and Forest Biotechnology Laboratory, Department of Forestry and Biodiversity, Tripura University, Suryamaninagar 799022, India) | Bimal Debnath (Plant Diversity and Forest Biotechnology Laboratory, Department of Forestry and Biodiversity, Tripura University, Suryamaninagar 799022, India)
Chromosomal study conducted in nine species of Dioscorea from different forest belts of Tripura revealed that their somatic chromosome number ranged from 2n=40 to 2n=60. The record of 2n=40 chromosome in the sexual phenotypes of Dioscorea hamiltonii, Dioscorea glabra and Dioscorea pubera are the first time report from Tripura, North East India. Moreover the somatic chromosome counts of 2n=60 in Dioscorea pentaphylla would be attributed as a new cytotype. However at the respective ploidy level no difference in somatic chromosome count was observed between their sexes.
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