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Abstract Detail

Systematics Section/ASPT

Kates, Heather Rose [1], Soltis, Pamela S. [2], Soltis, Douglas [3].

Species tree estimation in Cucurbita provides new insight into the genetic origins of crop species.

Phylogenetics can aid the study of plant domestication by resolving sister relationships between crops and their wild relatives, thereby identifying the ancestors of cultivated plants. Previous phylogenetic studies of Cucurbita (pumpkins and squashes) suggest histories of hybridization and deep coalescence within the group that complicate uncovering the genetic origins of the six crop subspecies. Here we present the results of species tree estimation for multiple individuals for each of the twenty Cucurbita species and subspecies based on allelic data from 44 loci derived from introns of single-copy nuclear genes. These results provide new insight into relationships between wild and domesticated species and illustrate an example of disagreement between species tree and concatenation-based phylogeny reconstruction. Our novel findings suggest that new methods for species tree estimation may provide a necessary alternative to a concatenation approach and to methods of species tree estimation that are too computationally intensive for large datasets.

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Related Links:
The Soltis Lab of Molecular Systematics and Evolutionary Genetics

1 - University of Florida, Florida Museum of Natural History, Dickinson Hall, PO Box 117800, Gainesville, FL, 32611, USA
2 - University Of Florida, Florida Museum Of Natural History, PO Box 117800, Gainesville, FL, 32611-7800, USA, 352/273-1964
3 - University of Florida, Florida Museum of Natural History, 1659 Museum Road, Dickinson Hall, Gainesville, FL, 32611, USA

species tree
species level phylogeny
deep coalescence
Rapid radiation
single-copy nuclear gene
crop wild relatives
crop domesticaton

Presentation Type: Oral Paper:Papers for Sections
Session: 5
Location: Salon 9/The Shaw Conference Centre
Date: Monday, July 27th, 2015
Time: 9:15 AM
Number: 5006
Abstract ID:1216
Candidate for Awards:None

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