Chromosome numbers for eight Trifolium species were determined. These represented first counts for T. philisticum Zoh. and T. strepens Crantz. and confirmation for T. amabile H.B.K., T. badium Schreb., T. megalanthum Steud., T. virginicum Small., T. aureum Poll., and T. physodes Stev. ex M.B. Six of the eight species had 2n = 16 chromosomes. Trifolium megalanthum, T. badium, T. aureum and T. strepens were found to have 2n = 32, 2n = 14, 2n = 16, and 2n = 16 chromosomes, respectively. T. strepens and T. aureum have the same chromosome number and morphology, and we accept them as the same species under the name of T. aureum. Karyotypic analysis of T. physodes revealed two basic types of chromosomes with nearly median and nearly submedian centromeres. Chromosome mean percentage lengths for T. physodes varied from 16.24 to 10.18 and the arm ratios varied from 1.14 to 1.68.
Discussion(0)
No comments yet. Be the first to comment.