Karyoevolutionary aspects of Atlantic hogfishes (Labridae–Bodianinae), with evidence of an atypical decondensed argentophilic heterochromatin

Molina, Wagner Franco; Neto, Clóvis Coutinho Motta; Sena, Delanne Cristina Souza de; Cioffi, Marcelo de Bello; Bertollo, L.A.C.

doi:10.1016/j.margen.2012.01.001

Cited by 13 publications

(16 citation statements)

References 39 publications

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“…Following this trend, S. radians was characterized by a preferential distribution of C-bands close to centromeres, in addition to a terminal GC-rich heterochromatin segment equivalent to NORs on pair 14 ( Figure 2 ). As this is the first report about GC content in Scarinae, further inferences can currently not be made, even though the pattern herein described agrees with that observed in other labrids of the subfamily Bodianinae ( Molina et al , 2012b ).…”

contrasting

confidence: 68%

“…The presence of single NORs is regarded as a basal and widespread trait in Perciformes ( Galetti Jr et al , 2006 ), including S. radians . Likewise, other labrids ( Molina et al , 2012b ), including Scarinae ( Sena and Molina, 2007a ), share a single NOR-bearing pair. However, multiple NORs seem to be an apomorphic feature in the subfamily Corinae, as reported in Halichoeres poeyi , H. radiatus ( Sena and Molina, 2007b ) and Coris julis ( Mandrioli et al , 2000 ).…”

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confidence: 99%

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Genetic identification of bucktooth parrotfish Sparisoma radians (Valenciennes, 1840) (Labridae, Scarinae) by chromosomal and molecular markers

et al. 2014

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Parrotfishes (Labridae, Scarinae) comprise a large marine fish group of difficult identification, particularly during juvenile phase when the typical morphology and coloration of adults are absent. Therefore, the goal of this study was to test cytogenetic markers and DNA barcoding in the identification of bucktooth parrtotfish Sparisoma radians from the northeastern coast of Brazil. Sequencing of cytochrome c oxidase subunit I (COI) confirmed all studied samples as S. radians, and all showed high similarity (99–100%) with Caribbean populations. The karyotype of this species was divergent from most marine Perciformes, being composed of 2n = 46 chromosomes. These consisted of a large number of metacentric and submetacentric pairs with small amounts of heterochromatin and GC-rich single nucleolar organizer regions (NORs) not syntenic to 5S rDNA clusters. These are the first data about DNA barcoding in parrotfish from the Brazilian province and the first refined chromosomal analysis in Scarinae, providing useful data to a reliable genetic identification of S. radians.

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confidence: 68%

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confidence: 99%

Genetic identification of bucktooth parrotfish Sparisoma radians (Valenciennes, 1840) (Labridae, Scarinae) by chromosomal and molecular markers

et al. 2014

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“…In fact, pericentric inversions stand out as the major chromosomal rearrangements in the evolution of the tribes Hypsigenyini, Scarini and Julidini (Sena and Molina 2007, Molina et al 2012). In turn, in the Novaculini, Cheilini, Pseudocheilini and Labrini tribes, both pericentric inversions and chromosome fusions have contributed for their karyotypic diversification (Ueno and Takai 2000).…”

Section: Introductionmentioning

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

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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.

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“…In this respect, genetic and cytogenetic analyses have significantly contributed to identify population variations in the marine environment. In fact, in this habitat, the biodiversity distribution patterns are complex as a result of the synergic interaction between vicariant events, species diversity, local adaptations, and ecological conditions (Rocha et al, 2005;Molina et al, 2012b).…”

Section: Introductionmentioning

confidence: 99%

Interregional cytogenetic comparisons in Halichoeres and Thalassoma wrasses (Labridae) of coastal and insular regions of the southwestern Atlantic

Amorim¹,

Cioffi²,

Bertollo³

et al. 2017

Genet. Mol. Res.

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Karyoevolutionary aspects of Atlantic hogfishes (Labridae–Bodianinae), with evidence of an atypical decondensed argentophilic heterochromatin

Cited by 13 publications

References 39 publications

Genetic identification of bucktooth parrotfish Sparisoma radians (Valenciennes, 1840) (Labridae, Scarinae) by chromosomal and molecular markers

Genetic identification of bucktooth parrotfish Sparisoma radians (Valenciennes, 1840) (Labridae, Scarinae) by chromosomal and molecular markers

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

Interregional cytogenetic comparisons in Halichoeres and Thalassoma wrasses (Labridae) of coastal and insular regions of the southwestern Atlantic

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