Amphidiploid production of hybrid between black raspberry and Rubus parvifolius L., a wild Asian species, using colchicine treatment

•Interspecific hybrids between black raspberry and Rubus parvifolius L. were developed.•Four SSR markers are available for both black raspberry and Rubus parvifolius L.•The tetraploids of the hybrids were obtained by exposure in 0.1% colchicine for 2 days.•The tetraploid of the interspecific hybrid has significantly larger flowers than those of the diploid.•Our results would contribute to the breeding of black raspberries using wild Asian species.