Exploring the diversity of Arctic eelpouts: First cytogenetic data on species of the genus Lycodes (Teleostei, Zoarcidae)

Ghigliotti, Laura; Cheng, C.‐H. Christina; Christiansen, Jørgen S.; Fevolden, Svein-Erik; Pisano, Eva

doi:10.1016/j.margen.2012.07.001

Cited by 2 publications

(1 citation statement)

References 39 publications

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“…Among the few species of Lycodinae (Zoarcidae, Perciformes) studied so far, 1 Antarctic species, Lycodichthys dearborni, and 4 Arctic Lycodes species share the remarkably conserved 2n = 48 all-acrocentric karyotype and a single paracentromeric location of rDNA, while only L. eudipleurostictus has rDNA sites at centromeric termini of 1 apparently diverse chromosome pair. While no hypothesis on primitive/derived condition has been proposed in this group, a translocation of rDNA sites has been implied [Ghigliotti et al, 2012].…”

Section: Single Rdna Sites: Interspecific Variation In Chromosomal Lomentioning

confidence: 87%

Twenty Years of Physical Mapping of Major Ribosomal RNA Genes across the Teleosts: A Review of Research

Gornung

2013

Cytogenet Genome Res

124

111

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Molecular cytogenetic data on the number and position of 45S ribosomal RNA genes (rDNA; located in nucleolus organizing regions, NORs) detected by FISH in 330 species of 77 families and 22 orders of bony fishes (Teleostei) and, additionally, 11 species of basal ray-finned fishes are compiled and analyzed. The portion of species with single rDNA sites in the sample amounts to 72%. The percentage of species with multiple NORs decreases with increasing numbers of rDNA loci per genome, i.e. scarcely 3% of species carry 4 or more rDNA-bearing chromosome pairs. 43% of all rDNA sites analyzed occur terminally on the short arms of chromosomes or constitute them. In general, terminal rDNA sites account for 87% of all examined cases. Interspecific variation in the location of single rDNA sites among related taxa, polymorphisms of multiple NORs in some groups of teleosts and analytical outcomes on the subject are reviewed.

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Section: Single Rdna Sites: Interspecific Variation In Chromosomal Lomentioning

confidence: 87%

Twenty Years of Physical Mapping of Major Ribosomal RNA Genes across the Teleosts: A Review of Research

Gornung

2013

Cytogenet Genome Res

124

111

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Molecular phylogenetic reconstruction and taxonomic investigation of eelpouts (Cottoidei: Zoarcales) based on Co-1 and Cyt-b mitochondrial genes

Turanov

Kartavtsev

Lee

et al. 2016

Mitochondrial DNA Part A

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The infraorder Zoarcales (Cottoidei), or eelpouts, includes about 400 species of coldwater fishes concentrated mainly in the North Pacific. To date, the molecular phylogenetic methods in combination with morphological data have significantly contributed to understanding the taxonomic composition of this group and made it possible to confirm/refute validity of some families of obscure origin. In spite of the growing amount of new data on taxonomy and evolution of eelpouts, a consideration of the original and independent data is obviously needed to verify the existing knowledge of this taxon. In this study, which is based on concatenated matrix of Co-1 and Cyt-b mitochondrial genes, as well as relying on the samples from seven families and 45 species of eelpouts, we have reconstructed the phylogeny, which is generally consistent with previous inferences. Despite the resolution of the original data matrix is low, we have demonstrated the monophyletic origin of the families Zoarcidae and Anarhichadidae, as well as Neozoarcidae, previously related to Stichaeidae and recently revised Eulophiidae. The polyphyletic patterns amongst some subfamilies in Stichaeidae have been confirmed, whereas Opisthocentrinae and Pholidae seem to constitute a valid family-level taxon. Our results provide new opportunities with respect to taxonomic relationships in the complex and diverse group of eelpouts , whose part in the tree of life is not covered by recently flourishing multilocus phylogeny of teleost fishes. In light of the data obtained, the necessity of more unified and reproducible approaches to resolve the issues of evolution and taxonomy of such a complex group as Zoarcales becomes more evident.

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Exploring the diversity of Arctic eelpouts: First cytogenetic data on species of the genus Lycodes (Teleostei, Zoarcidae)

Cited by 2 publications

References 39 publications

Twenty Years of Physical Mapping of Major Ribosomal RNA Genes across the Teleosts: A Review of Research

Twenty Years of Physical Mapping of Major Ribosomal RNA Genes across the Teleosts: A Review of Research

Molecular phylogenetic reconstruction and taxonomic investigation of eelpouts (Cottoidei: Zoarcales) based on Co-1 and Cyt-b mitochondrial genes

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