Abstract Detail

Systematics

Ottenlips, Michael [1], Mansfield, Donald H. [2], Buerki, Sven [1], Forest, Felix [3], Dodsworth, Stephen [4], Smith, James [5].

Resolving species boundaries in the Lomatium packardiae/L. anomalum clade of the L. triternatum (Apiaceae) complex.

Uncovering monophyletic groups that correspond to species in taxa that are morphologically similar is challenging and such groups are often questioned as to the rank (specific/subspecific) they actually represent. DNA sequence data can provide an independent data source to infer phylogenetic estimates that can then be used to determine if clades recovered from DNA data agree with groups assigned from morphological data. The Lomatium triternatum complex of approximately nine species is distributed across much of the Pacific Northwestern USA from Montana and Wyoming in the east to the Pacific coast and southward into Nevada and Utah. Across that distribution there is a wide range of morphological variation and multiple subspecific taxa have been described. Recent phylogenetic analyses of plastid DNA and rDNA regions have recovered multiple strongly-supported clades within the complex that agree with subtle, but distinctive morphologies, geographic distributions, and ecological parameters. However, relationships among what had been identified as L. packardiae and L. anomalum were recovered as polyphyletic, poorly supported, or did not recover clades that agreed with other parameters. Here we sample many more populations from throughout the range of the two species and include data from vegetation cover, soils, morphology (including SEM sampling of mature fruits), and high-throughput sequencing data using a newly-developed set of angiosperm-wide baits targeting low-copy nuclear genes. The new DNA data were analyzed using traditional concatenated methodologies as well as coalescent-based methods to determine if incomplete lineage sorting was a source of earlier discrepancies.

1 - Boise State University, Department of Biological Sciences, 1910 University Drive, Boise, ID, 83725, USA
2 - The College of Idaho, Department of Biology, 2112 Cleveland Boulevard, Caldwell, ID, 83605, USA
3 - Jodrell Laboratory, Royal Botanic Gardens Kew, Richmond, Surrey, TW9 3DS, UK
4 - Royal Botanic Gardens,Kew, Richmond, TW9 3DS, UK
5 - Boise State University, Department Of Biological Sciences, 1910 University Drive, Ms1515, Boise, ID, 83725, United States

Keywords:
Apiaceae
Speciation
baits
wetern North America.

Presentation Type: Oral Paper
Session: 30, Systematics II--Euasterids 1
Location: 113/Mayo Civic Center
Date: Tuesday, July 24th, 2018
Time: 4:15 PM
Number: 30009
Abstract ID:157
Candidate for Awards:None