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Abstract Detail

Bryology and Lichenology

Jutla, Satpal [1], Delavoi, Charles [1], Goffinet, Bernard [1], Liu, Yang [1], Medina, Rafael [2].

The phylogenetic structure in four chloroplast loci confirms the polyphyly of Physcomitrium pyriforme (Bryophyta) in North America.

Physcomitrium pyriforme (Hedw.) Hampe (Funariaceae) is widespread throughout the Holarctic region, with disjunct occurrences across North America and western Eurasia. In its current concept, the species exhibits broad morphological variation, as reflected by the existence of 32 historic synonyms. In contrast with this synthetic concept, recent phylogenetic inferences suggest that the putative morphological species P. pyriforme is polyphyletic, however, the number, relationships, and circumscriptions of the lineages remain ambiguous. We sampled 58 populations from across the range of this moss, with an emphasis in the United States, and amplified and sequenced four chloroplast loci (atpB-rbcL; psbA-trnH; rps4; and trnL-trnF). Bayesian and Maximum Likelihood analyses confirm that this morphospecies comprises at least three distinct, widely distributed assemblages. One clade includes accessions from the United States to Russia; the second clade comprises only populations from eastern to central United States; and the third lineage is highly structured into several subclades, one of which appears to be restricted to California. Whether any of the resolved assemblages could be morphologically diagnosed remains uncertain, but probable given previous taxonomic treatments in the group. This study reflects the need for closer inspection of relationships, even within species that are currently thought to be well understood.

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1 - University of Connecticut, 75 N Eagleville Rd, Storrs, CT, 06269, United States
2 - University Of Connecticut, Ecology And Evolutionary Biology, 75 North Eagleville Road, Storrs, CT, 06269-3043, USA


Presentation Type: Poster
Session: P, Bryology and Lichenological Section/ABLS Posters
Location: Exhibit Hall/Savannah International Trade and Convention Center
Date: Monday, August 1st, 2016
Time: 5:30 PM This poster will be presented at 5:30 pm. The Poster Session runs from 5:30 pm to 7:00 pm. Posters with odd poster numbers are presented at 5:30 pm, and posters with even poster numbers are presented at 6:15 pm.
Number: PBR001
Abstract ID:487
Candidate for Awards:None

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