Schulte et al. 2009 (Article) Bromelioideae

Phylogeny of Bromelioideae (Bromeliaceae) inferred from nuclear and plastid DNA loci reveals the evolution of the tank habit within the subfamily

Author(s):—K. Schulte, M.H.J. Barfuss & G. Zizka

Publication:—Molecular Phylogenetics and Evolution 51(2): 327-339. (2009)

Abstract:—Phylogenetic relationships within subfamily Bromelioideae (Bromeliaceae, Poales) were inferred using DNA sequence data from the low-copy nuclear gene phosphoribulokinase (PRK) and five plastid loci ( mat K gene, 3 0 trn K intron, trn L intron, trn L- trn F spacer, atp B- rbc L spacer). The PRK dataset exhibited a considerably higher proportion of potentially informative characters than the plastid dataset (16.9% vs. 3.1%), leading to a higher resolution and improved nodal support of the resulting phylogenies. Bromelia is resolved as sister to the remainder of the subfamily, albeit this relationship receives only weak nodal support. The basal position of Bromelia , as well as Deinacanthon , Greigia , Ochagavia , Fascicularia and Fern- seea within the subfamily is corroborated and the remainder of the subfamily forms a highly supported clade (the eu-bromelioids). By the inclusion of nuclear data the sister group position of Fernseea to the eu- bromelioids is now highly supported. Within the eu-bromelioids the resolution of the clade representing the more advanced core bromelioids has increased and further demonstrates the highly problematic gen- eric concept of Aechmea as well as Quesnelia . Moreover, the data were used to examine the evolution of sepal symmetry and the tank habit. Tracing of character transitions onto the molecular phylogeny implies that both characters have undergone only few transitions within the subfamily and thus are not as homoplasious as previously assumed. The char- acter state reconstruction reveals the great importance of the evolution of the tank habit for the diversi- fication of the core bromelioids.

Url.: http://www.sciencedirect.com/science/article/pii/S1055790309000402/pdfft?md5=3b471367e8180ae7250e15ea60d53c6c&pid=1-s2.0-S1055790309000402-main.pdf