Journal Article10.1055/S-2000-7471
Evaluation of Morphological Variation in the Lichen Diploschistes ocellatus (Ascomycota, Ostropales): Evidence from Nuclear rDNA ITS Sequence Data
13
TL;DR: The morphological examination revealed some unique features of var.
read more
Abstract: A morphologically distinct population (var. almeriensis) of the lichen species Diploschistes ocellatus from southern Spain is examined using morphological and molecular methods. While the morphological examination revealed some unique features of var. almeriensis, the ITS sequence data did not support a distinction from D. ocellatus s. str. The Kishino-Hasegawa test did not rule out trees distinguishing between the two morphotypes, although spectral analytical data support an inclusion of var. almeriensis in D. ocellatus. The influence of potentially erronously aligned ambiguous sites is evaluated by analysis of different alignments. However, all alignments agree in placing all specimens of D. ocellatus together and, consequently, in the consensus tree D. ocellatus s. lat. forms a monophyletic clade with high bootstrap support.
read more
Chat with Paper
AI Agents for this Paper
Find similar papers on Google Scholar, PubMed and Arxiv
Write a critical review of this paper
Analyze citations of this paper to find unaddressed research gaps
Citations
Lichen Systematics: The Role of Morphological and Molecular Data to Reconstruct Phylogenetic Relationships
TL;DR: The impact of molecular data on the classification and taxonomy of lichenized ascomycetes has been summarized regularly in recent years and light is shed on the relationship between results based on molecular and morphological studies of lichens.
62
Phylogenetic and morphological analysis of Antarctic lichen-forming Usnea species in the group Neuropogon
Fabian A. Seymour,Peter D. Crittenden,Nora Wirtz,Dag Olav Øvstedal,Paul S. Dyer,H. Thorsten Lumbsch +5 more
TL;DR: Phylogenetic analyses indicated that species circumscription in the Neuropogon group needs revision, with the principal species being non-monophyletic, and none of the morphological characters, or groups of characters, used in this study proved to be completely unambiguous markers for a single species.
55
Insight into the Cladonia convoluta-C. foliacea (Cladoniaceae, Ascomycota) complex and related species, revealed through morphological, biochemical and phylogenetic analyses
TL;DR: Molecular, chemical and morphological characters and phylogenetic analyses gave evidence to delimit two taxa in the C. convoluta/C.
38
Phylogenetic relationships and taxonomy of the Leptogium lichenoides group (Collemataceae, Ascomycota) in Europe
TL;DR: The taxonomy of the Leptogium lichenoides complex is revised here based on a morphological, ecological and molecular phylogenetic study and it is concluded that what was commonly recognized as Leptogsium lichensoides s.l.str.
36
Molecular phylogeny of Diploschistes inferred from ITS sequence data
TL;DR: The present ITS data suggest the opposite: perithecioid ascomata are apparently an apomorphic character within the genus, with the actinostomus group forming a derived monophyletic clade, however, the topology within Diploschistes s.
31
References
Clustal w: improving the sensitivity of progressive multiple sequence alignment through sequence weighting, position-specific gap penalties and weight matrix choice
TL;DR: The sensitivity of the commonly used progressive multiple sequence alignment method has been greatly improved and modifications are incorporated into a new program, CLUSTAL W, which is freely available.
Confidence limits on phylogenies: an approach using the bootstrap.
TL;DR: The recently‐developed statistical method known as the “bootstrap” can be used to place confidence intervals on phylogenies and shows significant evidence for a group if it is defined by three or more characters.
43.1K
Amplification and direct sequencing of fungal ribosomal RNA genes for phylogenetics
Thomas J. White
- 01 Jan 1990
Abstract: Comparative studies of the nucleotide sequences of ribosomal RNA (rRNA) genes provide a means for analyzing phylogenetic relation ships over a wide range of taxonomic levels (Woese and Olsen 1986; Zimmer et al 1988; Medlin et al 1988; Jorgensen and Cluster 1989). The nuclear small-subunit rDNA sequences (16S-like) evolve rela tively slowly and are useful for studying distantly related organisms, whereas the mitochondrial rRNA genes evolve more rapidly and can be useful at the ordinal or family level. The internal transcribed spacer region and intergenic spacer of the nuclear rRNA repeat units evolve fastest and may vary among species within a genus or among populations.
36K
MODELTEST: testing the model of DNA substitution.
David Posada,Keith A. Crandall +1 more
TL;DR: The program MODELTEST uses log likelihood scores to establish the model of DNA evolution that best fits the data.