Show simple item record Ramaiya, M Johnson, MG Shaw, B Heinrichs, J Hentschel, J von Konrat, M Davison, PG Shaw, AJ
dc.coverage.spatial United States 2011-06-21T17:27:37Z 2010-10
dc.identifier ajb.1000171
dc.identifier.citation Am J Bot, 2010, 97 (10), pp. 1707 - 1718
dc.identifier.issn 0002-9122
dc.description.abstract UNLABELLED: PREMISE OF THE STUDY: The Frullania tamarisci complex includes eight Holarctic liverwort species. One of these, F. asagrayana, is distributed broadly throughout eastern North America from Canada to the Gulf Coast. Preliminary genetic data suggested that the species includes two groups of populations. This study was designed to test whether the two groups are reproductively isolated biological species. • METHODS: Eighty-eight samples from across the range of F. asagrayana, plus 73 samples from one population, were genotyped for 13 microsatellite loci. Sequences for two plastid loci and nrITS were obtained from 13 accessions. Genetic data were analyzed using coalescent models and Bayesian inference. • KEY RESULTS: Frullania asagrayana is sequence-invariant at the two plastid loci and ITS2, but two clear groups were resolved by microsatellites. The two groups are largely reproductively isolated, but there is a low level of gene flow from the southern to the northern group. No gene flow was detected in the other direction. A local population was heterogeneous but displayed strong genetic structure. • CONCLUSIONS: The genetic structure of F. asagrayana in eastern North America reflects morphologically cryptic differentiation between reproductively isolated groups of populations, near-panmixis within groups, and clonal propagation at local scales. Reproductive isolation between groups that are invariant at the level of nucleotide sequences shows that caution must be exercised in making taxonomic and evolutionary inferences from reciprocal monophyly (or lack thereof) between putative species.
dc.format.extent 1707 - 1718
dc.language eng
dc.language.iso en_US en_US
dc.relation.ispartof Am J Bot
dc.relation.isversionof 10.3732/ajb.1000171
dc.title Morphologically cryptic biological species within the liverwort Frullania asagrayana.
dc.title.alternative en_US
dc.type Journal Article
dc.description.version Version of Record en_US 2010-10-0 en_US
duke.description.endpage 1718 en_US
duke.description.issue 10 en_US
duke.description.startpage 1707 en_US
duke.description.volume 97 en_US
dc.relation.journal American Journal of Botany en_US
pubs.issue 10
pubs.organisational-group /Duke
pubs.organisational-group /Duke/Staff
pubs.organisational-group /Duke/Trinity College of Arts & Sciences
pubs.organisational-group /Duke/Trinity College of Arts & Sciences/Biology
pubs.publication-status Published
pubs.volume 97

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