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Abstract Detail

Bryology and Lichenology

Johnson, Matthew [1], Medina, Rafael [2], Liu, Yang [3], Wickett, Norman [4], Shaw, Jonathan [5], Goffinet, Bernard [6].

Phylogenomic delineation of Physcomitrium (Bryophyta: Funariaceae) based on targeted sequencing of nuclear exons and their flanking regions rejects the retention of Physcomitrella and other genera.

The Funariaceae are a cosmopolitan and diverse lineage of mostly annual mosses, and exhibit variable sporophyte complexities, spanning from long, exerted, operculate capsules with two rings of well-developed teeth, to capsules immersed among maternal leaves, lacking a differentiated line of dehiscence (i.e., inoperculate) and without peristomes. The family underwent a rapid diversification, and the relationships of taxa with reduced sporophytes remain ambiguous. Here we infer the relationships of five taxa with highly reduced sporophytes based on 648 nuclear loci (exons complemented by their flanking regions), based on inferences from concatenated data and concordance analysis of single gene trees. Genome duplications from both allopolyploidy and autopolyploidy complicate taxonomic delineation within the group. Physcomitrellopsis is resolved as nested within one clade of Entosthodon. Physcomitrella s. lat., is resolved as a polyphyletic assemblage and, along with its putative relative Aphanorrhegma, nested within Physcomitrium. We propose a new monophyletic delineation of Physcomitrium, which accommodates species of Physcomitrella and Aphanorrhegma. The monophyly of Physcomitrium s. lat. is supported by a small plurality of exons, but a majority of trees inferred from exons and their adjacent non-coding regions.

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1 - Texas Tech University, Biological Sciences, 2901 Main Street, Ms3131, Lubbock, TX, 79409, United States
2 - Augustana College, Biology, 639 38th Street, Department Of Biology. Augustana College, Rock Island, IL, 61201, United States
3 - Fairy Lake Botanical Garden, Shenzhen, China
4 - Chicago Botanic Garden, 1000 Lake Cook Rd., Glencoe, IL, 60022, United States
5 - Duke University, Biology, 130 Science Drive, Box 90338, Durham, NC, 27708, United States
6 - University Of Connecticut, Department Of Ecology & Evolutionary Biology, 75 N. Eagleville Road, U-3043, Storrs, CT, 06269, United States


Presentation Type: Oral Paper
Session: BRY1, Bryology
Location: Tucson G/Starr Pass
Date: Tuesday, July 30th, 2019
Time: 9:00 AM
Number: BRY1003
Abstract ID:473
Candidate for Awards:None

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