Karyotype studies in dominant species ofAloefrom eastern India

Abstract

Abstract The karyotype asymmetry/ symmetry of three species of Aloe i.e. A.vera, A. indica and A. ferox was evaluated by eight different methods- TF%, As K%, Stebbins classification, Rec and Syi, A1 and A2, A, DI and AI and also elucidated the relationship between the species. Among all the methods, Stebbins classifi cation found to be less sensible than quantitative parameters. TF%, the Syi, As K%, A1, DI and A indices were unable to express correct parameters to study karyotype asymmetry on the basis of the variation in centromeric position. A2 (interchromosomal asymmetry) index was correctly described karyotype asymmetry on the basis of variation in chromosome length. AI (Asymmetry index) proved to be the most suitable method used to elucidate karyotype asymmetry. Scattered diagrams of correlations among the indices seems to be the best suited to draw overall quantitative relationship and displayed relationship among species with respect to karyotype asymmetry. Signifi cant correlations among AI-DI, A1-A2...