Rubus croceacanthus (2n=14), R. minusculus (2n=14), and their F1 hybrids were cytologically studied. Rubus croceacanthus and R. minusculus showed gradient and symmetric karyotypes uniformly formulated as 2n=14=10m+2sm +2'st. Their F1 hybrids also had the same karyotypic formulae as the parental species. Almost all PMCs of F1 hybrids showed seven bivalents, and univalents were rare. The karyotypic uniformity between the two species, and the preponderant formation of seven bivalents in their F1 hybrids indicates that R. croceacanthus and R. minusculus are closely related species with no perceptible difference in their genomes.
All Science Journal Classification (ASJC) codes
- Animal Science and Zoology
- Plant Science
- Cell Biology