Species boundaries and phylogenetic relationships within the green algal genus Codium (Bryopsidales) based on plastid DNA sequences

Abstract Gilliesieae are a South American tribe of Amaryllidaceae characterized by high floral diversity. Given different taxonomic interpretations and proposals for generic and specific relationships, a representative phylogenetic analysis is required to clarify the systematics of this group. The present study provides a framework for understanding phylogenetic relationships and contributing to the development of an appropriate taxonomic treatment of Gilliesieae. Molecular analyses, based on nuclear (ITS) and plastid DNA sequences (trnL-F and rbcL), resolve with strong support the monophyly of the tribe and the differentiation of two major clades. Clade I comprises the genera Gilliesia, Gethyum and Solaria and Clade II includes Miersia and Speea. These well-supported clades are mostly congruent with vegetative and karyotype characters rather than, e.g., floral symmetry. At the generic level, all molecular analyses reveal the paraphyly of Gilliesia and Miersia. Gethyum was found to be paraphyletic, resulting in the confirmation of Ancrumia as a distinct genus. Several instances of incongruent phylogenetic signals were found among data sets. The calibrated tree suggests a recent diversification of the tribe (Pliocene–Pleistocene), a contemporary process of speciation in which instances of hybridization and incomplete lineage sorting could explain patterns of paraphyly and incongruence of floral morphology.

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Phylogenetic relationships in Pleurothallidinae (Orchidaceae): combined evidence from nuclear and plastid DNA sequences

American Journal of Botany ◽

10.2307/3558390 ◽

2001 ◽

Vol 88 (12) ◽

pp. 2286-2308 ◽

Cited By ~ 87

Author(s):

Alec M. Pridgeon ◽

Rodolfo Solano ◽

Mark W. Chase

Keyword(s):

Dna Sequences ◽

Phylogenetic Relationships ◽

Plastid Dna

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Phylogenetic relationships in Polygalaceae based on plastid DNA sequences from the trnL‐F region

Taxon ◽

10.2307/1223706 ◽

2001 ◽

Vol 50 (3) ◽

pp. 763-779 ◽

Cited By ~ 44

Author(s):

Claes Persson

Keyword(s):

Dna Sequences ◽

Phylogenetic Relationships ◽

Plastid Dna ◽

F Region

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Photobiont associations in co-occurring umbilicate lichens with contrasting modes of reproduction in coastal Norway

The Lichenologist ◽

10.1017/s0024282916000232 ◽

2016 ◽

Vol 48 (5) ◽

pp. 545-557 ◽

Cited By ~ 8

Author(s):

Geir HESTMARK ◽

François LUTZONI ◽

Jolanta MIADLIKOWSKA

Keyword(s):

Dna Sequences ◽

Internal Transcribed Spacer ◽

Sampling Site ◽

Internal Transcribed Spacer Region ◽

Phylogenetic Placement ◽

Lichen Symbiosis ◽

Lasallia Pustulata ◽

Green Algal ◽

Coastal Cliffs ◽

Algal Genus

AbstractThe identity and phylogenetic placement of photobionts associated with two lichen-forming fungi, Umbilicaria spodochroa and Lasallia pustulata were examined. These lichens commonly grow together in high abundance on coastal cliffs in Norway, Sweden and Finland. The mycobiont of U. spodochroa reproduces sexually through ascospores, and must find a suitable algal partner in the environment to re-establish the lichen symbiosis. Lasallia pustulata reproduces mainly vegetatively using symbiotic propagules (isidia) containing both symbiotic partners (photobiont and mycobiont). Based on DNA sequences of the internal transcribed spacer region (ITS) we detected seven haplotypes of the green-algal genus Trebouxia in 19 pairs of adjacent thalli of U. spodochroa and L. pustulata from five coastal localities in Norway. As expected, U. spodochroa associated with a higher diversity of photobionts (seven haplotypes) than the mostly asexually reproducing L. pustulata (four haplotypes). The latter was associated with the same haplotype in 15 of the 19 thalli sampled. Nine of the lichen pairs examined share the same algal haplotype, supporting the hypothesis that the mycobiont of U. spodochroa might associate with the photobiont ‘pirated’ from the abundant isidia produced by L. pustulata that are often scattered on the cliff surfaces. Up to six haplotypes of Trebouxia were found within a single sampling site, indicating a low level of specificity of both mycobionts for their algal partner. Most photobiont strains associated with species of Umbilicaria and Lasallia, including samples from this study, represent phylogenetically closely related taxa of Trebouxia grouped within a small number of main clades (Trebouxia sp., T. simplex/T. jamesii, and T. incrustata+T. gigantea). Three of the photobiont haplotypes were found only in U. spodochroa thalli.

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Molecular phylogeny of Saudi Arabian Tetraena Maxim. and Zygophyllum L. (Zygophyllaceae) based on plastid DNA sequences

Bangladesh Journal of Plant Taxonomy ◽

10.3329/bjpt.v24i2.35111 ◽

2017 ◽

Vol 24 (2) ◽

pp. 155-164 ◽

Cited By ~ 2

Author(s):

Dhafer Ahmed Alzahrani ◽

Enas Jameel Albokhari

Keyword(s):

Phylogenetic Analysis ◽

Molecular Phylogeny ◽

Chloroplast Dna ◽

Dna Sequences ◽

Phylogenetic Relationships ◽

Maximum Parsimony ◽

Saudi Arabian ◽

Plastid Dna ◽

Plant Taxon ◽

Bayesian Criteria

In order to provide a basis for better understanding of phylogenetic relationships of Saudi Arabian Tetraena Maxim. and Zygophyllum L., 44 specimens representing seven taxa, were reconstructed based on chloroplast DNA data of rbcL and trnL-F. The combined chloroplast (rbcL and trnL-F) contributed more phylogenetically informative characters than in individual regions. Phylogenetic analysis of the combined chloroplast (rbcL and trnL-F) and in individual regions based on both of Maximum Parsimony and Bayesian criteria showed that the Saudi Arabian species of Tetraena and Zygophyllum were monophyletic. Zygophyllum fabag L. was nested in one clade with Z. xanthoxylum (Bunge) Engl. (Asian species), and all taxa of Tetraena were distributed in other clades.Bangladesh J. Plant Taxon. 24(2): 155–164.

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The evolutionary history and molecular systematics of the Musteloidea

10.1093/oso/9780198759805.003.0002 ◽

2018 ◽

Author(s):

Klaus-Peter Koepfli ◽

Jerry W. Dragoo ◽

Xiaoming Wang

Keyword(s):

Dna Sequences ◽

Phylogenetic Relationships ◽

Evolutionary History ◽

Molecular Data ◽

Morphological Data ◽

Species Boundaries ◽

Extant Species ◽

Taxonomic History ◽

History Of ◽

A New Species

This chapter provides a review of the evolutionary and taxonomic history of the Musteloidea, which is the most species-rich superfamily of the Carnivora, containing approximately 30% of the extant species in the order. An up-to-date summary of knowledge on the evolutionary and taxonomic history and phylogenetic relationships of the Mephitidae, Ailuridae, Procyonidae and Mustelidae is provided. Multilocus DNA sequences have made a large impact on the understanding of phylogenetic relationships among the Musteloidea. Molecular data have revealed distinct families (Ailuridae and Mephitidae) within the Musteloidea and have illuminated new relationships based on tempo and patterns of evolution within the Procyonidae. Morphological data in conjunction with molecular data have been used to elucidate species boundaries within certain musteloid genera and have led to the discovery of a new species. Research studies published during the last 30 years have enriched and transformed our understanding of the evolution of musteloid biodiversity.

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Phylogenetic Relationships Among Native and Naturalized Hieracium (Asteraceae) in Canada and the United States Based on Plastid DNA Sequences

Systematic Botany ◽

10.1600/036364407781179752 ◽

2007 ◽

Vol 32 (2) ◽

pp. 478-485 ◽

Cited By ~ 14

Author(s):

J. F. Gaskin ◽

L. M. Wilson

Keyword(s):

United States ◽

Dna Sequences ◽

Phylogenetic Relationships ◽

Plastid Dna ◽

The United States

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Phylogenetic relationships in Mormodes (Orchidaceae, Cymbidieae, Catasetinae) inferred from nuclear and plastid DNA sequences and morphology

Phytotaxa ◽

10.11646/phytotaxa.263.1.2 ◽

2016 ◽

Vol 263 (1) ◽

pp. 18 ◽

Cited By ~ 3

Author(s):

GERARDO A. SALAZAR ◽

LIDIA I. CABRERA ◽

GÜNTER GERLACH ◽

ERIC HÁGSATER ◽

MARK W. CHASE

Keyword(s):

Dna Sequences ◽

Phylogenetic Relationships ◽

Taxonomic Revision ◽

Plastid Dna ◽

Morphological Characters ◽

Bootstrap Support ◽

Consensus Trees ◽

Geographic Structure ◽

Outgroup Species ◽

Strong Bootstrap Support

Interspecific phylogenetic relationships in the Neotropical orchid genus Mormodes were assessed by means of maximum parsimony (MP) and Bayesian inference (BI) analyses of non-coding nuclear ribosomal (nrITS) and plastid (trnL–trnF) DNA sequences and 24 morphological characters for 36 species of Mormodes and seven additional outgroup species of Catasetinae. The bootstrap (>50%) consensus trees of the MP analyses of each separate dataset differed in the degree of resolution and overall clade support, but there were no contradicting groups with strong bootstrap support. MP and BI combined analyses recovered similar relationships, with the notable exception of the BI analysis not resolving section Mormodes as monophyletic. However, sections Coryodes and Mormodes were strongly and weakly supported as monophyletic by the MP analysis, respectively, and each has diagnostic morphological characters and different geographical distribution. The geographic structure reflected by the recovered phylogenetic patterns suggests that it is possible to undertake taxonomic revision of regional clades, which eventually will lead to a thorough revision of the genus.

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