Mol Phylogenet Evol 2021 Jun 16;159:107105. Epub 2021 Feb 16.
Herbarium and Library of African Botany, C.P. 265, Université Libre de Bruxelles, Campus de la Plaine, Boulevard du Triomphe 1050, Brussels, Belgium; Missouri Botanical Garden, Africa and Madagascar Department, 4344 Shaw Blvd., St. Louis, MO 63110, USA; Meise Botanic Garden, Domein van Bouchout, Nieuwelaan 38, B-1860 Meise, Belgium.
Angraecoid orchids present a remarkable diversity of chromosome numbers, which makes them a highly suitable system for exploring the impact of karyotypic changes on cladogenesis, diversification and morphological differentiation. We compiled an annotated cytotaxonomic checklist for 126 species of Angraecinae, which was utilised to reconstruct chromosomal evolution using a newly-produced, near-comprehensive phylogenetic tree that includes 245 angraecoid taxa. In tandem with this improved phylogenetic framework, using combined Bayesian, maximum likelihood and parsimony approaches on ITS-1 and five plastid markers, we propose a new cladistic nomenclature for the angraecoids, and we estimate a new timeframe for angraecoid radiation based on a secondary calibration, and calculate diversification rates using a Bayesian approach. Read More