Abstract Detail

Population Genetics/Genomics

Stubbs, Rebecca [1], Theodoridis, Spyros [2], Keller, Barbara [1], Conti, Elena [4].

Investigating species and genomic boundaries in sympatric and allopatric primrose populations.

Studies have suggested that parts of the genome are differentially affected by introgression as a result of hybridization, with some regions being resistant to gene flow while others are exchanged freely between related species. However, distinguishing between differential introgression and evolutionary processes, such as incomplete lineage sorting, historical gene flow, and genetic drift, that equally shape the heterogeneous genomic landscape requires the integration of both macro- and micro-evolutionary approaches, but studies are limited. To address this gap, we present the largest, most inclusive study, using the model plant system Primula sect. Primula (Primulaceae). This is being accomplished through extensive sampling spanning the entire range of our study system (~750 individuals in seven species), in conjunction with resequencing of whole genomes utilizing the high quality reference genome currently available within of study system (P. veris). Our downstream analyses will include both phylogenomic analyses (e.g., RAxML, ASTRAL, SNAQ, PhyloNet) and inference of ancient gene flow (ABC, ADMIXTURE). The planned research will generate new knowledge on the genomics of hybridization at levels of resolution unprecedented in plants, due to intensive sampling at multiple temporal (from phylogenomic to population genomic) and geographic scales (from allopatric to sympatric comparisons), replicate comparisons between species pairs with different strengths and directionality of crossability and reproductive isolation, and availability of a reference genome and linkage maps in the model system. In total, this research will provide innovative contributions to the growing field of hybridization and speciation studies.

1 - University of Zurich, Institute of Systematic and Evolutionary Botany, Zollikerstrasse 107, Zurich, 8008, Switzerland
2 - University of Copenhagen, Natural History Museum of Denmark, Øster Voldgade 5-7, København, 1350, Denmark
3 - University of Zurich, Institute of Systematic and Evolutionary Botany, Zollikerstrasse 107, Zurich, 8008, Switzerland
4 - Department Of Systematic And Evolutionary Botany, Zollikerstrasse 107, Zürich, 8008, Switzerland

Keywords:
Primula
hybridization
introgression
heterostyly
s-locus
supergene
Primulaceae.

Presentation Type: Poster
Session: P, Population Genetics/Genomics Posters
Location: Arizona Ballroom/Starr Pass
Date: Monday, July 29th, 2019
Time: 5:30 PM This poster will be presented at 6:15 pm. The Poster Session runs from 5:30 pm to 7:00 pm. Posters with odd poster numbers are presented at 5:30 pm, and posters with even poster numbers are presented at 6:15 pm.
Number: PPG004
Abstract ID:354
Candidate for Awards:None