Origins and genetic structure of Sorbus intermedia (Ehrh.) Pers. and S. hybrida L. (Rosaceae) in Fennoscandia
Within the systematically complex genus Sorbus, repeated hybridization, polyploidization and apomixis has led to a series of intermediate and evolutionary independent species. Sorbus intermedia (Ehrh.) Pers. (Swedish whitebeam) and S hybrida L. (Swedish service tree) are endemic to the Fennoscandian region and are both apomictic polyploid hybrids derived from diploid sexual species. However, their
