| Abstract Detail
Tropical Biology Valderrama, Eugenio [1], Sass, Chodon [2], Pinilla-Vargas , Maria [3], Skinner, David [4], Landis, Jacob [5], Guan, Clarice [3], Almeida, Ana Maria [6], Grunder, Nikolaus [7], Specht, Chelsea [8]. Unraveling the spiraling radiation: a phylogenomic analysis of Neotropical Costus L. The family of pantropical spiral gingers (Costaceae Nakai; c.125 spp.) can be used as a model to enhance our understanding of the mechanisms underlying Neotropical diversity. Costaceae has higher taxonomic diversity in South and Central America (c.65 Neotropical species, c.30 African, c.23 Southeast Asian), particularly due to a radiation of Neotropical species of the genus Costus L. (c.50 spp.). However, a well-supported phylogeny of the Neotropical spiral gingers including thorough sampling of species encompassing their full morphologic and geographic variation is lacking. Previous phylogenetic analyses using a small sampling of loci lack resolution for the relationships of the New World lineages. Here we use a phylogenomic approach to estimate the phylogeny of a sample of Neotropical Costus species using a targeted enrichment approach. Baits were designed to capture conserved elements variable at the species level using available genomic sequences of Costus species and relatives. We obtained 832 loci (generating 792,974 aligned base pairs and 31,462 parsimony informative sites) for samples that encompassed the geographical and/or morphological diversity of the genus. Analyses including all available loci resulted in high support values, even those producing unresolved gene trees and having a low proportion of variable sites. Concatenation and coalescent-based species trees methods converged in almost the same topology suggesting a robust estimation of species relationships, even under the high levels of gene tree conflict. The bait set and resulting phylogeny shed light on problematic taxonomic decisions, enigmatic and undescribed lineages and improves our understanding of the origins of the diversity of the Neotropical spiral gingers.
1 - Cornell University, Section of Plant Biology and the L.H. Bailey Hortorium, School for Integrative Plant Sciences, 236 Tower Road, 510 Mann Library, Ithaca, NY, 14853, USA
2 - 77A Tamalpais Rd, Berkeley, CA, 94708, United States
3 - Cornell University, Section of Plant Biology and the L.H. Bailey Hortorium, School for Integrative Plant Sciences, 236 Tower Road, 506 Mann Library, Ithaca, NY, 14853, USA
4 - Le Jardin Ombragé, Takkahassee, FL, USA
5 - Cornell University, Plant Biology and the L.H. Bailey Hortorium, School of Integrative Plant Science, 506 Mann Library Building, Ithaca, NY, 14850, USA
6 - California State University East Bay, Department Of Biology, 25800 Carlos Bee Blvd, Hayward, CA, 94542, United States
7 - California State University East Bay, Department Of Biology, 25800 Carlos Bee Blvd, Hayward, CA, 94542, USA
8 - Cornell University, School of Integrative Plant Science and L.H. Bailey Hortorium, 502 Mann Library, Ithaca, NY, 14850, USA
Keywords:
Costaceae
Zingiberales
Evolutionary radiation
phylogenomics
Costus
Neotropical.
Presentation Type: Oral Paper
Session: TROP1, Tropical Biology Contributed Papers
Location: Virtual/Virtual
Date: Tuesday, July 28th, 2020
Time: 10:15 AM
Number: TROP1002
Abstract ID:281
Candidate for Awards:None |
