Abstract
1. Detailed karyotypic analysis of ten varieties of different geographical regions have been carried out.2. In the somatic counts all the varieties exhibited the similar chromosome number i. e. 2n=30.3. Chromosome type B1 and B2 have consistent appearance in all the varieties analysed.4. On the basis of chromosome types and genotypic variation in karyotypes it was concluded that these genotypes (varieties) share a common ancestor in origin and have gone under a series of structural alternations.5. Karyotypic analysis revealed that species under study follow a progressive evolutionary path way.6. According to the extent of karyotypic asymmetry 3 varieties out of ten can be grouped as primitive ones.
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