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Fragaria iturupensis : ウィキペディア英語版 | Fragaria iturupensis
''Fragaria iturupensis'', the Iturup Strawberry, is a species of strawberry, endemic to Iturup in the Kuril Islands. It is noted to have relatively large berries for a wild species, similar in appearance to those of ''Fragaria virginiana''. 〔Hummer, K.E., Sabitov, A., & Davis, T. 2005. Iturup And Sakhalin Island Strawberries. ''Hortscience'' 40(4): 1127. (Abstract )〕〔(Iturup Strawberry data from GRIN Taxonomy Database )〕 ==Polyploidy== All strawberries have a base haploid count of 7 chromosomes. ''Fragaria iturupensis'' was initially reported as octoploid (with 8 sets of chromosomes, 56 in total), but subsequent testing〔Hummer, K.E.; Nathewet, P.; Yanagi, T. (2009). Decaploidy in ''Fragaria iturupensis'' (Rosaceae). ''American Journal of Botany''. 96(3): 713–716.〕 found decaploids (with ten sets of chromosomes, a total of 70). It is unclear whether the earlier report was an error, or whether two forms exist.〔
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