10.22376/ijpbs.2019.10.1.p1-12 Volume 6 Issue 1 2015 (January - March) North East India is one of the mega biodiversity hot spot, also one of the richest reservoir of genetic variability and diversity of different crops. Here, natural distribution of non tuberous lessThan i greaterThan Solanum lessThan /i greaterThan species is also found to be very rich. Despite the importance of lessThan i greaterThan Solanum lessThan /i greaterThan species no information in the karyotype of the members of this taxa available in North East India is found. In the present investigation, a comparision was made between the karyotypes of six important species of the genus lessThan i greaterThan Solanum lessThan /i greaterThan ( lessThan i greaterThan Viz lessThan /i greaterThan . lessThan i greaterThan S lessThan /i greaterThan . lessThan i greaterThan torvum lessThan /i greaterThan Swartz., lessThan i greaterThan S lessThan /i greaterThan . lessThan i greaterThan ferox lessThan /i greaterThan Linn., lessThan i greaterThan S lessThan /i greaterThan . lessThan i greaterThan nigrum lessThan /i greaterThan Linn., lessThan i greaterThan S lessThan /i greaterThan . lessThan i greaterThan kurzii lessThan /i greaterThan Br., lessThan i greaterThan S lessThan /i greaterThan . lessThan i greaterThan Sysimbrifolium lessThan /i greaterThan Lam. and lessThan i greaterThan S lessThan /i greaterThan . lessThan i greaterThan xanthocarpum lessThan /i greaterThan Schrad. and Wendl.) available in this region of India to interpret the karyomorphological interrelation and affinity among themselves. The karyotype analysis of lessThan i greaterThan Solanum kurzii lessThan /i greaterThan Br. which is endemic to this region is reported for the first time. All the species under study have chromosome number 2n= 24. The longest chromosome with 3.80 µm length was observed in lessThan i greaterThan Solanum sisymbrifolium lessThan /i greaterThan Lam. and the smallest one with a length of 0.50 µm was observed in lessThan i greaterThan Solanum xanthocarpum lessThan /i greaterThan Schrad. and Wendl. With respect to chromosome morphology the karyotype of these species have a majority of metacentric and submetacentric chromosomes. AJOY KUMAR DAS AND SAILENDRA PRASAD BORAH Northeast India; biodiversity; Solanum sp.; karyotype 1196-1209