Abstract Detail

Green Land: Multiple Perspectives on Green Algal Evolution and the Earliest Land Plants

Wickett, Norman [1], Barker, Michael [2], Gitzendanner, Matt [3], Graham, Sean [4], Grosse, Ivo [5], Li, Zheng [6], Melkonian, Michael [7], Mirarab, Siavash [8], Porsch, Martin [5], Quint, Marcel [5], Soltis, Douglas [9], Soltis, Pamela [10], Ullrich, Kristian [11], Wong, Gane Ka-Shu [12], Leebens-Mack, Jim [13].

Reconstructing green plant relationships using over one thousand transcriptomes.

Viridiplantae, green plants, includes approximately 500,000 species that comprise critical ecological drivers and many of the most economically important organisms on Earth. An accurate phylogenetic framework is required to better understand more than a billion years of green plant evolution, including fundamental transitions such as the origins of terrestrial plants, a vascular system, seeds, and flowers. The One Thousand Plant Transcriptomes Initiative (OneKP or 1KP) was a large-scale, international effort to generate high-throughput transcriptome sequences for at least one thousand phylogenetically representative samples across Viridiplantae. Among other objectives, the OneKP project used 1,147 transcriptomes (in addition to 31 plant genome sequences) to reconstruct green plant relationships, infer instances of ancient whole-genome duplication, and determine the relative timing and extent of large gene family expansions. The complex evolutionary history of Viridiplantae, marked by polyploidy, frequent gene duplication, rapid radiations, and the impact of processes such as incomplete lineage sorting necessitates a phylogenomic approach that accounts for discordant signal among gene histories. Here, we discuss the results of phylogenomic analyses of 410 inferred low-copy nuclear genes, with a focus on the distribution of signal among gene trees.

1 - Chicago Botanic Garden, 1000 Lake Cook Rd., Glencoe, IL, 60022, United States
2 - Department Of Ecology & Evolutionary Biology, P.O. Box 210088, Tucson, AZ, 85721, United States
3 - University Of Florida, Biology, PO Box 117800, Gainesville, FL, 32611, United States
4 - University Of British Columbia, Department Of Botany, 3529 - 6270 University Boulevard, Vancouver, BC, V6T 1Z4, Canada
5 - Martin Luther University Halle-Wittenberg, Halle, Germany
6 - University Of Arizona, Department Of Ecology And Evolutionary Biology, P.O. Box 210088, Tucson, AZ, 85721, United States
7 - Institute Of Botany, University Of Cologne Gyrhofstr. 15, Cologne, 50931, Germany
8 - University of California, San Diego, Electrical and Computer Engineering, 9500 Gilman Drive, La Jolla, CA, 92093, USA
9 - University of Florida, Florida Museum of Natural History, PO Box 117800, Gainesville, FL, 32611, USA
10 - University Of Florida, Florida Museum Of Natural History, Po Box 117800, Gainesville, FL, 32611, United States
11 - Max Planck Institute for Evolutionary Biology, Plön, Germany
12 - University of Alberta, Biological Sciences, Edmonton, AB, T6G 2E1, Canada
13 - University Of Georgia, Plant Biology, 2101 Miller Plant Sciences, Athens, GA, 30602, United States

Keywords:
Green Plants
Virdiplantae
phylogenomics
transcriptomes
land plants
gene trees
polyploidy
Whole genome duplication
Gene Family Expansion
Species Trees.

Presentation Type: Symposium Presentation
Session: SYM3, Green land: Multiple perspectives on green algal evolution and the earliest land plants
Location: San Luis 1/Starr Pass
Date: Tuesday, July 30th, 2019
Time: 10:15 AM
Number: SYM3006
Abstract ID:779
Candidate for Awards:None