Abstract Detail

Evolutionary History, Biogeography, and Floral Morphometrics of Salvia (Lamiaceae)

Kriebel, Ricardo [1], Drew , Bryan T [2], Drummond, Chloe [3], Mahdjoub, Mohamed Malik [4], Walker, Jay [5], Lemmon, Emily [6], Lemmon, Alan [7], Sytsma, Kenneth J. [8].

Tracking the temporal shifts in area, biomes, and pollinators in the radiation of Salvia (sages, Lamiaceae) across continents: leveraging Anchored Hybrid Enrichment and targeted sequence data.

We explore world-wide patterns of geographical and species diversification in Salvia by leveraging Anchored Hybrid Enrichment (AHE) genomic data and targeted gene sequencing for a phylogenetic framework of 528 of nearly 1,000 species in the genus. With biogeographical, fossil, biome, and pollinator data, we examine temporal correlations of shifts in area, habitat, and pollinator regime, and to five inferred branches with BAMM identified bursts of species diversification. A well-resolved, phylogenetic backbone of Salvia sensu lato, and thus subgeneric designations, are presented for the first time with the use of AHE data. Salvia originated in Southwest Asia at the end of the Oligocene and dispersed subsequently throughout the world, in some instances loosely correlated with later shifts in species diversification. Using a new method in BioGeoBEARS to model time-availability of biomes, we show that biome shifts are frequent in Salvia from a likely ancestral lineage utilizing broadleaf and/or coniferous forests and/or arid shrublands. Although clades often specialize to specific biome types, none of the five species diversification shifts are correlated to shifts in biomes. Mediterranean biome lineages only arise, recently, out of either grassland or arid biomes. Likewise, shifts in pollinator regime are not correlated to species diversification shifts, except for one hummingbird shift that precedes a major shift in diversification near the crown of subg. Calosphace. Unlike previously proposed models for Salvia, we find an early shift to hummingbird from bee pollination in New World subg. Calosphace with multiple shifts back to bee clades. We present a model of dispersal, subsequent spread, and diversification of both New World sages and hummingbirds using chronograms of both Salvia and hummingbirds. The lack of tight correlation of area, biome, or pollinator shifts to all five species diversification shifts points to other important drivers of speciation in Salvia - this explored by a subsequent presentation in this colloquium on floral morphospace (Kreibel et al.).

1 - University of WI-Madison, Botany, 132 Birge Hall, , 430 Lincoln Drive, Madison, WI, 53706, USA
2 - University of Nebraska-Kearney, Biology, 2401 11th Ave, Kearney, NE, 68849, USA
3 - University Of Wisconsin-Madison, Botany Dept, 430 Lincoln Drive, Madison, WI, 53706, United States
4 - University A. Mira of Bejaia, Laboratory of Ecology and Environment, Bejaia, Algeria
5 - Union High School, 6636 S. Mingo Road, Tulsa, OK, 74133, USA
6 - Florida State University, Department of Biological Sciences, Tallahassee, FL, 32306, USA
7 - Florida State University, Department of Scientific Computing, Tallahassee, FL, 32306, USA
8 - University Of Wisconsin, Department Of Botany, Birge Hall, 430 Lincoln Drive, Madison, WI, 53706, United States

Keywords:
ancestral region estimation
Anchored hybrid enrichment
BAMM
BEAST
BioGeoBEARS
dispersal
diversification
historical biogeography
hummingbirds
Lamiaceae
Next generation sequencing
pollinators
Salvia.

Presentation Type: Colloquium Presentations
Session: C09, Evolutionary history, biogeography, and floral morphometrics and Salvia (Lamiaceae)
Location: 105/Mayo Civic Center
Date: Wednesday, July 25th, 2018
Time: 9:30 AM
Number: C09007
Abstract ID:380
Candidate for Awards:None