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Abstract Detail


Straub, Shannon C.K. [1], Liston, Aaron [2], Weitemier, Kevin [3], McDonnell, Angela Jean [4], Fishbein, Mark [4].

Phylogenomics of Temperate North American Milkweeds (Asclepias) based on 768 nuclear genes.

North American milkweeds are plants in the genus Asclepias (Apocynaceae) well-known for their interactions with insect herbivores, such as monarch butterfly larvae, that are mediated by host plant chemistry. Resolving the relationships in this genus of ca. 115 species has been difficult because it is a recent, rapid evolutionary radiation that exhibits low sequence variation and problematic levels of incomplete lineage sorting, and to a more limited extent, introgression. Here we focus on the phylogenomics of the temperate North American clade of ca. 50 species by using the Hyb-Seq approach for high-throughput data collection for 768 putatively single copy nuclear genes, as well as whole plastomes, for multiple individuals per species from populations across their ranges. Species tree analyses of nuclear data result in topologies that conflict with the topology of the plastome tree, but are more similar to relationships that are expected based on morphology.

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1 - Hobart and William Smith Colleges, Department of Biology, 300 Pulteney Street, Geneva, NY, 14456, USA
2 - Oregon State University, Department Of Botany & Plant Pathology, 2082 Cordley Hall, Corvallis, OR, 97331-2902, USA, 541/737-5301
3 - Oregon State University, Botany And Plant Pathology, Cordley Hall 2082, Corvallis, OR, 97331, USA
4 - Oklahoma State University, Plant Biology, Ecology & Evolution, 301 Physical Sciences, Stillwater, OK, 74078, United States

targeted sequencing
species tree.

Presentation Type: Oral Paper
Session: 38, Phylogenomics III
Location: 204/Savannah International Trade and Convention Center
Date: Wednesday, August 3rd, 2016
Time: 10:30 AM
Number: 38010
Abstract ID:821
Candidate for Awards:None

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