Abstract
Karyomorphological studies were carried out in three natural populations (Ss0777, Ss1276 and Ss0478) of Solanum surattense. A somatic chromosome number of 2n=24 was observed in all the three populations establishing that the base number of the species is x=12. Detailed karyotypic studies have revealed the dissimilarities in the length and quality of chromosomes which have been sup-posed to be due to asymmetrical karyotype. The climatic conditions and repat-terning of chromosomes have also been accounted for the diversification of karyo-type within the populations.
