Intricate variation patterns in the diploid-polyploid complex of Alyssum montanum-A. repens (Brassicaceae) in the Apennine peninsula: Evidence for long-term persistence and diversification

Abstract

We provide evidence for the presence of Mediterranean refugia for the studied Alyssum montanum-A. repens complex located in central and southern Italy, which, however, did not contribute to the postglacial colonization of Central Europe. Past extinctions, genetic bottlenecks, and recent expansion were inferred in Central Europe, while long-term accumulation of diversity as well as polyploidization occurred in the Apennines.

Keywords

• Abruzzo
• AFLPs
• Alyssum diffusum
• Apennines
• Brassicaceae
• Calabria
• Gargano
• morphometrics
• refugia
• southwestern Alps