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Abstract Detail


Martine, Christopher [1], McDonnell, Angela [2], Cantley, Jason [3], Jordon-Thaden, Ingrid [4], Gilman, Ian [5], Jobson, Peter [6].

Are leaky males the key to understanding breeding system transitions in Australian Solanum?

The roughly 25 species included in the “Solanum dioicum Group” of northern Australia are either andromonoecious or functionally dioecious (with “female” plants producing inaperturate pollen). The numerous species in this group exhibiting the latter system represent the most significant radiation of dioecious taxa in the genus. Previous attempts to assess phylogenetically the directionality of breeding system transitions in the evolution of the group have been equivocal, with only slight support for the hypothesis (considered most likely by previous authors) that andromonoecy arose from hermaphroditism (ancestral in the genus) and then transitioned to dioecy 1-2 times. Using ddRADSeq data consisting of over 120,000 SNPs from 50+ populations across 15 taxa, we find that the long-held assumption of an andromonoecy-dioecy transition seems to now be flipped on its head – an inference that is informed by observations of leaky dioecy among plants in the field and those under greenhouse cultivation.

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1 - Bucknell University, Biological Sciences, 203 Biology Building, Lewisburg, PA, 17837, United States
2 - Bucknell University, Biology, 1 Dent Drive, Bucknell University Biology Department, Lewisburg, PA, 17837, United States
3 - San Francisco State University, Department of Biology, 1600 Holloway Avenue, San Francisco, CA, 94132, USA
4 - University Of Wisconsin Madison, Botany, 144 Birge Hall, 430 Lincoln Drive, Madison, WI, 53706, United States
5 - Yale University, Ecology And Evolutionary Biology, Osborn Memorial Labs, 165 Prospect Street, New Haven, CT, 06511, United States
6 - Northern Territory Herbarium, Alice Springs

breeding systems
Plant Reproduction Biology
leaky dioecy.

Presentation Type: Oral Paper
Session: 45, Systematics IV--Caryophs to Euasterids 2
Location: 111/Mayo Civic Center
Date: Wednesday, July 25th, 2018
Time: 4:30 PM
Number: 45011
Abstract ID:433
Candidate for Awards:None

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