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Abstract
Karyotype analysis of six species of genus Glycine indicated chromosome number to be 2n=40 in G. canescens, G. clandestina, G. latifolia, G. max cultivars Monetta and MACS-13 and 2n=80 in G. tabacina and G. tomentella. Tetraploid species (2n=80) had nearly double the length of haploid chromosome complement of diploid species. Chromosomes were median to submedian. Diploid species (2n=40) had one pair of SAT-chromosomes whereas tetraploid species (2n=80) had two pairs of SAT-chromosomes. Karyotypes of all these species were more or less similar, inspite of broad inter-specific variations in the morphological characters, suggesting the species differentiation might have been due to micromutations.
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