Chromosomal Changes and Stasis in Marine Fish Groups

Molina, Wagner Franco

doi:10.1201/b10746-4

Cited by 61 publications

(61 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…g . Serranidae, characterized by a highly conserved karyotype pattern; Molina, ), the data reported herein confirm that the karyotype structure among the Muraenidae is highly diversified, as indicated by the large N F range (Table ). To date, the variation in the chromosomal arm number among moray eel species has been correlated with the occurrence of pericentric inversions and heterochromatin addition (Salvadori et al , ).…”

Section: Discussionsupporting

confidence: 80%

Comparative cytogenetics of six Indo‐Pacific moray eels (Anguilliformes: Muraenidae) by chromosomal banding and fluorescence in situ hybridization

Coluccia

Deidda

Cannas

et al. 2015

Journal of Fish Biology

View full text Add to dashboard Cite

A comparative cytogenetic analysis, using both conventional staining techniques and fluorescence in situ hybridization, of six Indo-Pacific moray eels from three different genera (Gymnothorax fimbriatus, Gymnothorax flavimarginatus, Gymnothorax javanicus, Gymnothorax undulatus, Echidna nebulosa and Gymnomuraena zebra), was carried out to investigate the chromosomal differentiation in the family Muraenidae. Four species displayed a diploid chromosome number 2n = 42, which is common among the Muraenidae. Two other species, G. javanicus and G. flavimarginatus, were characterized by different chromosome numbers (2n = 40 and 2n = 36). For most species, a large amount of constitutive heterochromatin was detected in the chromosomes, with species-specific C-banding patterns that enabled pairing of the homologous chromosomes. In all species, the major ribosomal genes were localized in the guanine-cytosine-rich region of one chromosome pair, but in different chromosomal locations. The (TTAGGG)n telomeric sequences were mapped onto chromosomal ends in all muraenid species studied. The comparison of the results derived from this study with those available in the literature confirms a substantial conservation of the diploid chromosome number in the Muraenidae and supports the hypothesis that rearrangements have occurred that have diversified their karyotypes. Furthermore, the finding of two species with different diploid chromosome numbers suggests that additional chromosomal rearrangements, such as Robertsonian fusions, have occurred in the karyotype evolution of the Muraenidae.

show abstract

Section: Discussionsupporting

confidence: 80%

Comparative cytogenetics of six Indo‐Pacific moray eels (Anguilliformes: Muraenidae) by chromosomal banding and fluorescence in situ hybridization

Coluccia

Deidda

Cannas

et al. 2015

Journal of Fish Biology

View full text Add to dashboard Cite

show abstract

“…Indeed, groups with marked karyotype conservatism (Molina 2007) usually exhibit low diversification in the frequency and organization of ribosomal sites (Motta-Neto et al 2011, Calado et al 2013), while those with moderate or higher rates of chromosomal diversification (Molina et al 2014) may display marked variations in the rDNA regions (Lima-Filho et al 2014a, b). …”

Section: Discussionmentioning

confidence: 99%

“…Chromosomes with homogeneous and small amounts of repetitive DNAs have been found in fish species with little karyotype diversification (Molina 2007, Motta-Neto et al 2011). On the other hand, heterogeneous and large amounts of repetitive DNAs are related in several families with notable levels of chromosomal rearrangements and differentiation (Moreira-Filho and Bertollo 1991, Souza et al 2001, Favarato et al 2016).…”

Section: Discussionmentioning

confidence: 99%

Co-located 18S/5S rDNA arrays: an ancient and unusual chromosomal trait in Julidini species (Labridae, Perciformes)

Amorim¹,

Cioffi²,

Bertollo³

et al. 2016

CCG

Self Cite

View full text Add to dashboard Cite

Wrasses (Labridae) are extremely diversified marine fishes, whose species exhibit complex interactions with the reef environment. They are widely distributed in the Indian, Pacific and Atlantic oceans. Their species have displayed a number of karyotypic divergent processes, including chromosomal regions with complex structural organization. Current cytogenetic information for this family is phylogenetically and geographically limited and mainly based on conventional cytogenetic techniques. Here, the distribution patterns of heterochromatin, GC-specific chromosome regions and Ag-NORs, and the organization of 18S and 5S rDNA sites of the Atlantic species Thalassoma noronhanum (Boulenger, 1890), Halichoeres poeyi (Steindachner, 1867), Halichoeres radiatus (Linnaeus, 1758), Halichoeres brasiliensis (Bloch, 1791) and Halichoeres penrosei Starks, 1913, belonging to the tribe Julidini were analyzed. All the species exhibited 2n=48 chromosomes with variation in the number of chromosome arms among genera. Thalassoma noronhanum has 2m+46a, while species of the genus Halichoeres Rüppell, 1835 share karyotypes with 48 acrocentric chromosomes. The Halichoeres species exhibit differences in the heterochromatin distribution patterns and in the number and distribution of 18S and 5S rDNA sites. The occurrence of 18S/5S rDNA syntenic arrangements in all the species indicates a functionally stable and adaptive genomic organization. The phylogenetic sharing of this rDNA organization highlights a marked and unusual chromosomal singularity inside the family Labridae.

show abstract

“…Interpopulation chromosomal analyses have been increasingly used in marine fish species with wide geographic distribution [23]. The data are used to identify population variations along the coast of Brazil [27, 65], between this region and the Caribbean [66], or to reaffirm differences between sister species [67].…”

Section: Discussionmentioning

confidence: 99%

Genetic Multipartitions Based on D-Loop Sequences and Chromosomal Patterns in Brown Chromis,Chromis multilineata(Pomacentridae), in the Western Atlantic

Cunha

Souza

Dias

et al. 2014

BioMed Research International

Self Cite

View full text Add to dashboard Cite

Connectivity levels among Brazilian reef fish fauna populations have attracted growing interest, mainly between mainland shores and oceanic islands. The Pomacentridae, whose phylogeographic patterns are largely unknown in the Atlantic, are a family of dominant fish in reef regions. We present data on the variability and population structure of damselfish Chromis multilineata in different areas along the northeast coast of Brazil and in the waters around the oceanic islands of Fernando de Noronha (FNA) and Saint Peter and Saint Paul Archipelago (SPSPA) through analysis of the HVR1 mtDNA sequence of the control region. The remote SPSPA exhibits the highest level of genetic divergence among populations. Conventional and molecular cytogenetic analysis showed similar karyotype patterns (2n = 48 acrocentrics) between these insular areas. Our estimates reveal three genetically different population groups of C. multilineata on the Brazilian coast. The level of genetic structure is higher than previous data suggested, indicating complex panel of interactions between the oceanic island and coastal populations of Brazil.

show abstract

Chromosomal Changes and Stasis in Marine Fish Groups

Cited by 61 publications

References 0 publications

Comparative cytogenetics of six Indo‐Pacific moray eels (Anguilliformes: Muraenidae) by chromosomal banding and fluorescence in situ hybridization

Comparative cytogenetics of six Indo‐Pacific moray eels (Anguilliformes: Muraenidae) by chromosomal banding and fluorescence in situ hybridization

Co-located 18S/5S rDNA arrays: an ancient and unusual chromosomal trait in Julidini species (Labridae, Perciformes)

Genetic Multipartitions Based on D-Loop Sequences and Chromosomal Patterns in Brown Chromis,Chromis multilineata(Pomacentridae), in the Western Atlantic

Contact Info

Product

Resources

About