Diversification of Bromelioideae (Bromeliaceae) in the Brazilian Atlantic rainforest: a case study in Aechmea subgenus Ortgiesia

摘要: Aechmea subgenus Ortgiesia comprises ca. 20 species distributed in Brazil, Argentina, Paraguay, and Uruguay, with a center of diversity the Brazilian Atlantic rainforest. We examined interspecific relationships based on Amplified Fragment Length Polymorphisms (AFLP). Ninety-six accessions belonging to 14 were sampled, genotyped 11 AFLP primer combinations. The neighbor joining (NJ) tree depicted two main genetic groups within Ortgiesia, four subgroups. NJ showed short internal branches, indicating an overall shallow divergence among as expected for recently radiated subfamily Bromelioideae. Our results suggest that hybridization and/or incomplete lineage sorting may have hampered reconstruction Ortgiesia. mapping petal color (yellow, blue, pink, or white), inflorescence type (simple compound), shape (ellipsoid, subcylindric, cylindric, pyramidal) against indicated these characters are limited taxonomic use due homoplasy. An analysis current distribution identified southern region rainforest, between latitudes 26° 27°S, subgenus.