Abstract Detail

Hybrids and Hybridization

Lee, Soo-Rang [1], Song, Bo-Kyung [2], Kim, Ji-Won [2], Kim, Young-Dong [2].

Homoploid hybrid speciation in an oceanic island inferred by genome-wide molecular investigation and ecological niche modeling: Proposed experimental design.

Island plants provide good study models to understand speciation and divergence due to the several reasons including the followings: geographical isolation resulting in closed systems and relatively accurate dating in the line of geological events e.g. volcanic islands. A small volcanic island (~73 km²) located 137 km apart from mainland Korea, Ulleungdo, shows high plant diversity harboring multiple endemic species. Of the island endemic taxa, Aster species offer particularly interesting system as the taxa exhibited a pattern of homoploid hybrid speciation in former studies. To examine species diversification in the insular Aster taxa (A. chusanensis, A. pseudoglehnii, and A. oharai), we designed the study with integrated approaches combining genome-wide molecular genotyping, ecological niche modeling and crossing and viability tests. Our goals of the study are: 1) phylogenetic relationships among the target species and the two related species A. spathulifolius and A. ageratoides; 2) to assess varying level of hybridization between A. pseudoglehnii, and A. oharai; 3) to determine whether A. chusanensis is a well-established hybrid species between the remaining two species; 4) to investigate niche diversification for the target species and 5) to reconstruct evolutionary history of the target taxa. We will collect thousands of genome-wide markers through ddRAD-seq and hundreds of samples across the species range. The ecological traits related to reproduction, e.g. seed set, pollen viability and germination rate will be measured from the field and in the crossing tests. To draw compelling conclusions, we also will apply hypotheses based statistical approaches such as Approximate Bayesian Computation. GIS and species distribution model will be utilized for Ecological niche modeling exploring niche diversification.

1 - Hallym University, Multidisciplinary Genome Institute, Hallym Daehakgil 1, Chuncheon , 24252, Korea, Republic of
2 - Hallym University, Department of Life Sciences, Hallydaehakgil 1, Chuncheonsi, Ganwondo, 24252, S Korea

Keywords:
hybridization
Aster
ecological niche modelling
ddRAD-seq
phylogeny
speciation.

Presentation Type: Poster
Session: P, Hybrids and Hybridization Posters
Location: Arizona Ballroom/Starr Pass
Date: Monday, July 29th, 2019
Time: 5:30 PM This poster will be presented at 5:30 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: PHH001
Abstract ID:236
Candidate for Awards:None