岐阜県産ヘビイチゴ属植物の染色体数と分布  [in Japanese] Chromosome numbers and distribution of Duchesnea (Rosaceae) in Gifu prefecture  [in Japanese]

Five ploidy forms, 2n=14, 21, 49, 56 and 84, were observed in Duchesnea in Gifu Prefecture, Japan. Triploid Duchesnea was reported from a locality for the first time. In a similar manner as in Toyama Prefecture, the plants with 2n=14 were D. chrysantha (ZOLL. et MOR.) MIQUEL and those with 2n=84 D. indica (ANDR.) FOCKE and thus, those with 2n=49 (heptaploid) and 2n=56 (octoploid) were considered as natural hybrids between the above two species. Among 303 samples, 176 were diploid (58.1%), 1 triploid (0.3%), 2 heptaploid (0.7%), 21 octoploid (6.9%) and 103 dodecaploid (34.0%). The geographical distribution of five types of ploid is shown in Fig. 3 and Fig. 4. Apparently, diploid and dodecaploid plants do not show any differential geographical distribution, but octoploid plants were found in some area of Mint Province.