Karyo-Morphological analyses of Drimia gigantea and Drimia Viridula; Two of the three species in Altissima complex of the family hyacinthaceae

Drimia is a heterogeneous, poorly understood genus that requires major rearrangement. Chromosome behavior of gigantea and viridula; two species in D. altissima complex was studied for karyotypes transmission extra chromosomes pair pollen viability. Meristematic cells at the root tips viridula were by conventional cytogenetic karyotype analysis. numbers 2n = 22 20 viridula, respectively. Extra chromosome resulted 22. length 55.45 mm 55.50 gigantea. Bridge formation, laggards, exclusion formation 9 (3.26%), 10 (90.93%) 11(5.81%) bodies observed gigantea, consistently formed bivalents. Pollen viability 90.63% 94.95% viridula. Karyotypic evidence suggests an evolved from fragmentation second-largest chromosome, not B-chromosome because it participated cell division. High frequent occurrence ten bivalents, indicated closer to progenitors common genetic system within complex. Furthermore, karyo-morphological differences support separation taxa as distinct species.