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Abstract Detail


Dorey, Jenna [1].

Systematics of Carex section Laxiflorae (Cyperaceae).

Carex section Laxiflorae includes some of the most common and ecologically important sedges in forests of eastern North America, as well as several narrowly endemic species. The section is currently comprised of 16 species in North America, but is in great need of taxonomic revision. Morphometric analyses indicate that several species in eastern North America contain previously undocumented diversity, and traditional sequencing methods provide preliminary evidence that section Laxiflorae is not monophyletic. However, the phylogenies produced by traditional sequencing display conflicting gene tree topologies and very low support values, thus, failing to fully resolve intra and inter sectional relationships. To overcome this challenge, I constructed ddRAD libraries of 31 putative taxa from 216 different individuals and sent the libraries for paired-end 150 base pair sequencing on an Illumina NextSeq 550 machine. I am using this genomic-wide sequence data to test whether morphologically defined species are supported by molecular data, to detect hybridization, and to clarify the phylogenetic relationship of section Laxiflorae to North American members of sections Paniceae and Bicolores.

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1 - The New York Botanical Garden, 2900 Southern Blvd, Bronx, NY, 10458, United States

none specified

Presentation Type: Oral Paper
Session: 37, Systematics III--Monocots 2 to Caryophs
Location: 111/Mayo Civic Center
Date: Wednesday, July 25th, 2018
Time: 8:15 AM
Number: 37002
Abstract ID:865
Candidate for Awards:None

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