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Abstract Detail


Schafran, Peter [1], Zimmer, Elizabeth [2], Taylor, W Carl [3], Musselman, Lytton [4].

Nuclear-plastid phylogenomic discordance in Isoetes (Lycopodiophyta) from North America.

The American clade of Isoetes represents a rapid diversification in an ancient genus, containing approximately half of all extant species and with a crown node age estimate of 5 MYA. Due to its recent radiation, this clade has been the most difficult to resolve phylogenetically. Using whole chloroplast genomes and hybrid capture nuclear markers, relationships between some species of Isoetes from North America are resolved with high support. However, different tree topologies are inferred by nuclear and plastid datasets and by different tree inference methods. We examined strong relationships between datasets for some species and discordance between others, with a focus on implications for phylogenetic analysis of polyploids derived from these diploid species. Chloroplast capture is supported as a likely mechanism for disagreement between genomic compartments in at least one diploid and one polyploid species.

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1 - Old Dominion University, Biological Sciences, 1740 Legare Lane, Virginia Beach, VA, 23464, United States
2 - Smithsonian NMNH, Botany, P.O. Box 37102, Smithsonian National Museum Of Natural History, Washington, DC, 20013, United States
3 - 2912 22nd St N, Arlington, VA, 22201, United States
4 - Old Dominion University, Biological Sciences, 5115 Hampton Blvd, 110 Mills Godwin Building, Norfolk, VA, 23529, United States

target enrichment.

Presentation Type: Oral Paper
Session: PTER2, Pteridology II
Location: San Pedro 1/Starr Pass
Date: Monday, July 29th, 2019
Time: 1:45 PM
Number: PTER2002
Abstract ID:895
Candidate for Awards:None

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