TY - JOUR

T1 - Phylogenetics of Iriarteeae (Arecaceae), cross-Andean disjunctions and convergence of clustered infructescence morphology in Wettinia

AU - Bacon, Christine D.

AU - Velasquez-Puentes, Francisco

AU - Florez-Rodriguez, Alexander

AU - Balslev, Henrik

AU - Galeano, Gloria

AU - Bernal, Rodrigo

AU - Antonelli, Alexandre

PY - 2016/10

Y1 - 2016/10

N2 - The Neotropical palm tribe Iriarteeae is ubiquitous in several lowland and montane biomes across northern South America, but the phylogenetic relationships among genera and species remain unresolved. A well resolved phylogenetic tree is key to exploring morphological evolution in the tribe, including striking features such as the complex and unique inflorescence structures in Wettinia. We generated data from five plastid (ndhA, petD-rpoA, psbK-trnS and trnG) and six nuclear (AG1, CISPs 4 and 5, PRK, RPB2 and WRKY21) molecular loci to infer the phylogeny. We explored the evolutionary patterns of trait evolution using the D statistic and stochastic character mapping. All genera were inferred as monophyletic and their relationships were recovered with strong to moderate support. Based on these results we synonymize the two species of Iriartella under I. setigera and resurrect Socratea montana from S. rostrata. Interspecific relationships were mostly consistent with current morphological classification. One exception concerns trait evolution in Wettinia, in which the clustered infructescence was found to have evolved at least four times. Phylogenetic signal for this trait was weak and randomly distributed across the tree, probably representing convergence. Our results provide a robust phylogenetic framework for Iriarteeae, largely corroborating current morphological classification and laying the groundwork for macroevolutionary studies in the tribe. (C) 2016 The Linnean Society of London.

AB - The Neotropical palm tribe Iriarteeae is ubiquitous in several lowland and montane biomes across northern South America, but the phylogenetic relationships among genera and species remain unresolved. A well resolved phylogenetic tree is key to exploring morphological evolution in the tribe, including striking features such as the complex and unique inflorescence structures in Wettinia. We generated data from five plastid (ndhA, petD-rpoA, psbK-trnS and trnG) and six nuclear (AG1, CISPs 4 and 5, PRK, RPB2 and WRKY21) molecular loci to infer the phylogeny. We explored the evolutionary patterns of trait evolution using the D statistic and stochastic character mapping. All genera were inferred as monophyletic and their relationships were recovered with strong to moderate support. Based on these results we synonymize the two species of Iriartella under I. setigera and resurrect Socratea montana from S. rostrata. Interspecific relationships were mostly consistent with current morphological classification. One exception concerns trait evolution in Wettinia, in which the clustered infructescence was found to have evolved at least four times. Phylogenetic signal for this trait was weak and randomly distributed across the tree, probably representing convergence. Our results provide a robust phylogenetic framework for Iriarteeae, largely corroborating current morphological classification and laying the groundwork for macroevolutionary studies in the tribe. (C) 2016 The Linnean Society of London.

KW - Andes

KW - character evolution

KW - infructescence

KW - Neotropics

KW - palms

KW - South America

KW - DIVERSIFICATION PATTERNS

KW - PALMS ARECACEAE

KW - NUCLEAR GENES

KW - EVOLUTION

KW - SEQUENCES

KW - CLASSIFICATION

KW - HYPERDOMINANCE

KW - BIODIVERSITY

KW - ALIGNMENT

KW - BIOLOGY

U2 - 10.1111/boj.12421

DO - 10.1111/boj.12421

M3 - Journal article

VL - 182

SP - 272

EP - 286

JO - Botanical Journal of the Linnean Society

JF - Botanical Journal of the Linnean Society

SN - 0024-4074

IS - 2

T2 - World Palms Sympsoium

Y2 - 1 January 2015

ER -