“…Change of ploidy and ongoing hybridization are considered major drivers of diversification also in the genus Sorbus and were studied by many authors using morphological, biochemical and genetic approaches (Liljefors, 1955;Warburg and K arp ati, 1968;Challice and Kovanda, 1978;Aldasoro et al, 1998;Nelson-Jones et al, 2002;Robertson et al, 2004Robertson et al, , 2010Chester et al, 2007;Feulner et al, 2014). In Europe, this genus comprises five mostly diploid and sexual species (S. aucuparia, S. chamaemespilus, S. aria, S. domestica, S. torminalis).…”