Abstract Detail

Ecology

Gaynor, Michelle [1], Soltis, Douglas [2], Soltis, Pamela [3], Ponciano, Jose Miguel [4].

Formation, Establishment, and Persistence of Autopolyploid Populations.

Autopolyploidy, possessing more than two complete copies of the genome of a single ancestral species, has been extensively modeled. Historically, it was believed that an autotetraploid had to outcompete its diploid progenitor to persist. Stebbins, for example, proposed that the formation and spread of an autotetraploid, though seldomly successful, caused the diploid progenitor to become geographically restricted and rare. We now know that autopolyploids and their diploid progenitors can both remain extant and in some cases coexist; however, many models fail to consider coexistence of mixed cytotypes. Here we use matrix models to investigate formation, establishment, and persistence of diploids, triploids, and autotetraploids over time with ongoing gene flow. Specifically, we investigate the population trajectories and probability of co-occurrence with variation in reproductive isolation, founding population size, and environmental stochasticity. Our work is fundamental to a better understanding of the dynamics of coexistence of multiple cytotypes and is a necessary step for further work modeling the dynamics between autopolyploids and their diploid progenitors.

1 - University Of Florida, Florida Museum Of Natural History, Dickinson Hall, Gainesville, FL, 32611, USA
2 - University Of Florida, Dept. of Biology, Gainesville, FL, 32611, USA
3 - University Of Florida, Florida Museum Of Natural History, Gainesville, FL, 32611.0, United States
4 - University of Florida, Department of Biology, 309 Carr Hall, PO Box 118525, Gainesville, FL, 32611, USA

Keywords:
polyploidy
coexistence
matrix population model
whole genome duplication.

Presentation Type: Oral Paper
Number: EC07007
Abstract ID:859
Candidate for Awards:Ecological Section Best Graduate Student Paper