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Abstract Detail


Voronina, Veronica [1], Levin, Rachel Ann [2], Miller, Jill S. [2].

Resolving evolutionary relationships within Lycium (Solanaceae) using RAD-Seq data.

Phylogenies are useful for framing ecological and evolutionary studies, but for young groups obtaining well-resolved and robustly supported species trees has proven challenging using traditional sequence-based markers. The genus Lycium is one of only a few genera in Solanaceae with a worldwide distribution and is among the larger genera with ca. 90 species. To-date, species level resolution in Lycium has been limited, likely due to its young evolutionary age and potential hybridization in certain lineages. This study used a Restriction site Associated DNA sequencing (RAD-Seq) approach to generate considerable data for phylogenetic reconstruction. Sampling in the present study included 52 species (ca. 58% of the genus) and 58 accessions across all major clades. Our data set included 77,595 variable positions across the sampled species, and we used maximum likelihood (RAxML) to reconstruct evolutionary relationships. RAD-Seq data provided a highly resolved and well-supported inference of species relationships in Lycium. Our reconstruction confirms the convergent and associated evolution of gender dimorphism and polyploidy across the genus, as well as several long distance, trans-oceanic dispersal events. In addition, the RAD-Seq dataset has clarified relationships among American species and within the monophyletic Old World lineage.

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1 - Amherst College, Biology, McGuire Life Sciences Building, Amherst, MA, 01002, USA
2 - Amherst College, Department Of Biology, McGuire Life Sciences Building, Amherst, MA, 01002, USA

gender dimorphism

Presentation Type: Oral Paper
Session: 41, Systematics III: Euasterids
Location: Sundance 4/Omni Hotel
Date: Wednesday, June 28th, 2017
Time: 2:15 PM
Number: 41004
Abstract ID:244
Candidate for Awards:None

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