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Abstract Detail

Population Genetics/Genomics

McDonnell, Angela [1], Cantley, Jason T. [2], Jobson, Peter [3], Martine, Christopher [4].

Population genomics of an edaphic radiation: andromonoecious Solanum in the Australian Monsoon Tropics.

The Australian Monsoon Tropics (AMT) encompass nearly one-quarter of the Australian continent and represent one of the largest and least disturbed tropical biomes on the planet. While the AMT includes an impressive array of seasonally dry habitats including alluvial clay plains, savannas, dunes, sandstone escarpments, and river drainage systems that support an array of plant life, relatively little is known about the evolution of most species in the flora, what role climatic fluctuations of the Quaternary have played in shaping its diversity, or how biogeographic breaks have impacted species distributions and radiations. The andromonoecious clade within the “Solanum dioicum group” is distributed throughout much of the AMT and represents a model system in which to test hypotheses on the radiation of lineages in the region. We sampled SNPs from across the genome in multiple populations of 19 species of Solanum via a ddRAD approach and present a new understanding of phylogenetic relationships, population structure, and demographic modeling including estimation of bottlenecks, range expansions, and post-divergence migration among populations for the andromonoecious Australian Solanum clade. This will help reveal how the interplay of climate and geography have shaped plant evolution in the AMT. Solanum is the first lineage of several to be used to understand how biogeographic barriers and climate have shaped AMT species distributions and evolutionary history.

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1 - Bucknell University, Biology, 1 Dent Drive, Bucknell University Biology Department, Lewisburg, PA, 17837, United States
2 - San Francisco State University, Biology, 1600 Holloway Ave, San Francisco, CA, 94132, USA
3 - Northern Territory Herbarium, Alice Springs, Australia
4 - Bucknell University, Bucknell University, 1 Dent Drive, Lewisburg, PA, 17837, United States

population genomics

Presentation Type: Oral Paper
Session: 47, Population Genetics and Genomics II
Location: 101/Mayo Civic Center
Date: Wednesday, July 25th, 2018
Time: 1:30 PM
Number: 47001
Abstract ID:581
Candidate for Awards:Margaret Menzel Award

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