Abstract
The chromosome number and karyotype of Psidium guineense Sw. was investigated. The species had the chromosome count of n = 22 and 2n = 44 with a karyotype formula . 2A sc sm +8B m =24C nm +10D sm The karyotype of the species was slightly asymmetric with a little variation in chromosome length. The species revealed 4 pairs of metacentric, 12 pairs of nearly metacentric and 6 pairs of sub-metacentric chromosomes one of which also had secondary constriction. No meiotic irregularities were recorded. The chromosome constancy of the karyotype recorded in the present study justifies a new record of the present endemic threatened species growing wild in Tripura.
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