Karyotype Analysis in Three Species of Genus Cyamopsis

Karyotype analysis in three species of Cyamopsis showed an identity in chromosome number (2 n==14) and similarity in morphology. All the chromosomes were found to be either medianly or submedianly constricted. C. serrata has chromosome complement longer than that of C. senegalensis and C. tetragonoloba. The chromosome length in C. tetragonoloba, C. serrata and C. senegalensis ranged between 7.16 u, to to 9.26 u, 7.33 n, to 11.52 u and 5.50 u to 9.60 u, respectively. The T.F. value of C. tetragonoloba 1(44%) which is also indicative of similarity in karyotypes among these species. All the three species have symmetrical karyotypes. The shifts in centromere position seemed to have occurred in this genus with respect to three pairs of chromosomes only. However, it would be reasonable to assume that species C. serrata in view of slightly longer chromosomes may represent a comparatively primitive status in relation to the rest of the species.