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Abstract Detail

Botany 2015 Colloquium: Phylogenomics and the 1000 plants (1KP) initiative

Soltis, Pamela S. [1], Soltis, Douglas [2], Gitzendanner, Matthew [3].

1KP and Angiosperm Phylogenomics.

The 1KP initiative provides phylogenomic inference and resources across the approximately half a billion species of Viridiplantae. Angiosperms represent at least 60% of Viridiplantae and account for ~2/3 of the transcriptomes assembled by 1kp. Phylogenomic analyses using a supermatrix comprising ~800 species of angiosperms and first and second codon positions from over 400 nuclear genes provide a comprehensive view of evolutionary history from the perspective of the nuclear genome. Notable phylogenetic results include: Amborella sister to all other extant angiosperms, with subsequent divergence of Nymphaeales and Austrobaileyales prior to the radiation of Mesangiospermae, within which relationships remain poorly resolved and/or supported. Ceratophyllaceae are sister to all other mesangiosperms, with monocots sister to a clade of magnoliids + (Chloranthales + eudicots), but with weak support. Within magnoliids, there is strong support for Magnoliales + Laurales sister to Piperales + Canellales. Relationships among basal eudicots are not strongly supported, but Trochodendraceae are sister to Buxaceae + core eudicots. Within core eudicots, there is general support for Superrosidae and Superasteridae, although the placement of Santalales within Superrosidae requires further attention. As found previously with nuclear data, the COM clade of Rosidae is sister to malvids, whereas nearly complete plastome sequences place it with fabids. Other key points of angiosperm phylogeny will be discussed, emphasizing comparisons between nuclear and plastid phylogenies. The transcriptome resources of 1kp can be used in a variety of ways, at both deep and shallow evolutionary scales. We conclude with an overview of MarkerMiner, a pipeline for discovery of putatively single-copy nuclear genes from transcriptome resources such as 1kp.

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


Presentation Type: Colloquium Presentations
Session: C1
Location: Salon 4/The Shaw Conference Centre
Date: Monday, July 27th, 2015
Time: 10:15 AM
Number: C1010
Abstract ID:1130
Candidate for Awards:None

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