Cytogenetic studies in three species of Lutjanus (Perciformes: Lutjanidae: Lutjaninae) from the Isla Margarita, Venezuela

Nirchio, Mauro; Rondón, Rodolfo; Oliveira, Cláudio; Ferreira, Itamar; Martins, Cesar; Pérez, Julio E.; Sola, Luciana; Rossi, Anna Rita

doi:10.1590/s1679-62252008000100012

Cited by 19 publications

(24 citation statements)

References 21 publications

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“…It is worth noting that specimens of L. synagris from Brazil (Rocha & Molina, 2008) do not show any biarmed chromosome. The pattern of the heterochromatin distribution observed in O. chrysurus and R. aurorubens confirms that a limited presence of heterochromatic blocks at the centromeres of all chromosomes is a general characteristic of Lutjanidae, as this pattern is shared by all the 11 species investigated in this sense (Table 1), including those species for which more than one population has been studied, such as L. analis, L. synagris (Nirchio et al, 2008;Rocha & Molina, 2008) and O. chrysurus (Rocha & Molina, 2008;this paper). This evidence suggests that heterochromatinization processes have not played an important role in the karyotypic evolution of Lutjanidae.…”

Section: Resultssupporting

confidence: 65%

“…This study continues a cytogenetic survey of Venezuelan snappers (Nirchio et al, 2008, Table 1) by extending the investigation to the two monotypic genera, Ocyurus and Rhomboplites, which, along with Lutjanus, represent the three genera of Lutjaninae, with a total of 12 species, existing in Venezuela (Cervigón, 1993). The two monotypic species, Ocyurus chrysurus, the yellowtail snapper, and Rhomboplites aurorubens, the vermilion snapper, have an almost overlapping western Atlantic distribution, extending southwards from Massachusetts, USA, and Bermuda to southeastern Brazil, including the Gulf of Mexico and Caribbean Sea (Allen, 1985;Froese & Pauly, 2008).…”

Section: Introductionmentioning

confidence: 75%

“…quinquelineatus (Ueno & Takai, 2008), and in two out of the 21 examined specimens of L. synagris (Nirchio et al, 2008). Thus, in the former species, the Robertsonian rearrangement is related to the presence of a chromosomal sex determination mechanism, while in the latter it is apparently unrelated to sex and reflects an intra-specific chromosome polymorphism.…”

Section: Resultsmentioning

confidence: 95%

“…However, in 2008, three different studies added new data, mainly for species of the genus Lutjanus (Nirchio et al, 2008;Rocha & Molina, 2008;Ueno & Takai, 2008), reporting karyotypes as well as several finer cytogenetic features. All these studies have shown that a general chromosome homogeneity occurs within the family, but that derived karyotypes can also be found, whose phylogenetic interpretation remains unclear.…”

Section: Introductionmentioning

confidence: 99%

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Cytogenetic characterization of Rhomboplites aurorubens and Ocyurus chrysurus, two monotypic genera of Lutjaninae from Cubagua Island, Venezuela, with a review of the cytogenetics of Lutjanidae (Teleostei: Perciformes)

et al. 2009

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Lutjanidae, commonly known as snappers, includes 105 species, grouped in four subfamilies. In spite of the high number of species and of its worldwide distribution, the family has been little investigated and the phylogenetic relationships among some of its genera and species are still cause for debate. Only a small number of the species has been cytogenetically analysed. This study reports the first description of the karyotype of Rhomboplites aurorubens as well as data concerning the distribution of the constitutive heterochromatin and the location of the 18S rRNA and the 5S rRNA genes. Specimens of Ocyurus chrysurus from Venezuela were also investigated for the same cytogenetic features. Both species have a 48 uniarmed karyotype, but R. aurorubens has a single subtelocentric chromosome pair, the smallest of the chromosome complement, among the other acrocentric chromosomes. The C-positive heterochromatin is limited to the pericentromeric regions of all chromosomes. Both species show a single chromosome pair bearing the Nucleolus Organizer Regions, but NORs are differently located, in a terminal position on the short arms of the smallest chromosomes in R. aurorubens and in a paracentromeric position in a chromosome pair of large size in O. chrysurus. In O. chrysurus, the 5S rDNA gene cluster is located on a medium-sized chromosome pair, whereas in R. aurorubens it is syntenic with the 18S rDNA gene cluster on chromosome pair number 24. The obtained cytogenetic data, along with previous cytogenetic, morphological and molecular data for the family, reinforce the proposal to synonymize genus Ocyurus with Lutjanus. A review of Lutjanidae cytogenetics is also included.Lutjanidae, comumente conhecidos como snappers, inclui 105 espécies, reunidas em quatro subfamílias. A despeito do grande número de espécies e de sua distribuição mundial, a família tem sido pouco estudada e as relações filogenéticas entre alguns de seus gêneros e espécies ainda é motivo de debates. Apenas um pequeno número de espécies foi citogeneticamente analisada. Esse estudo apresenta a primeira descrição do cariótipo de Rhomboplites aurorubens assim como dados relativos à distribuição de heterocromatina constitutiva e localização dos genes 18S rRNA e 5S rRNA. Espécimes de Ocyurus chrysurus da Venezuela foram também analisados quanto às mesmas características citogenéticas. Ambas as espécies têm cariótipos compostos de 48 cromossomos com um único braço, entretanto R. aurorubens tem um único par de cromossomos subtelocêntrico, o menor do complemento cromossômico, entre os outros cromossomos acrocêntricos. A heterocromatina C-positiva é limitada à região pericentromérica de todos os cromossomos. Ambas as species apresentam um único par com Regiões Organizadoras de Nucléolo, mas as RONs são localizadas em posições diferentes, em posição terminal no braço curto dos menores cromossomos de R. aurorubens e em posição paracentromérica no braço longo de um par de cromossomos grandes de O. chrysurus. Em O. chrysurus, os genes 5S rDNA estão localizados em u...

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Section: Resultssupporting

confidence: 65%

Section: Introductionmentioning

confidence: 75%

Section: Resultsmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

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Cytogenetic characterization of Rhomboplites aurorubens and Ocyurus chrysurus, two monotypic genera of Lutjaninae from Cubagua Island, Venezuela, with a review of the cytogenetics of Lutjanidae (Teleostei: Perciformes)

et al. 2009

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“…Hybridization was recorded in a number of lutjanid species, such as L. synagris and O. chrysurus (Domeier andClarke 1992, Loftus 1992). Recent analyses (Rocha and Molina 2008, Nirchio et al 2008, 2009) have confirmed that the chromosomic constitution of the lutjanids, including species of the genera Lutjanus, Ocyurus, and Rhomboplites, is highly conserved, which would permit introgressive hybridization or hybridization. At the moment, however, there is no evidence of such hybridization in the red snappers.…”

Section: Demographic Historymentioning

confidence: 99%

Population Structure of Lutjanus purpureus (Lutjanidae - Perciformes) on the Brazilian coast: further existence evidence of a single species of red snapper in the western Atlantic

Silva

Sampaio

Schneider

2012

An. Acad. Bras. Ciênc.

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The present study focus on the mitochondrial control region to investigate phylogeographic patterns and population structure in Lutjanus purpureus, and to evaluate the genetic similarity between L. purpureus and L. campechanus. For the initial analysis, 810 base pairs sequence from control region were obtained from 239 specimens of L. purpureus collected from four localities off the Brazilian coast. The results revealed the presence of a single panmictic population characterized by high values of genetic diversity. The 299 base pairs hypervariable portion were used for the combined analysis of L. purpureus and L. campechanus, being 275 haplotypes identified in the 414 specimens. Phylogenetic tree and haplotype network did not indicate phylogeographic substructuring between the two species, but rather an intense intermingling of individuals. Considering their marked morphological similarity, the molecular data presented here indicate that only one species of red snapper exists in the western Atlantic.

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High congruence of karyotypic and molecular data on Hypostomus species from Brazilian southeast

2021

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The Hypostomini tribe comprises a single genus, Hypostomus, which possibly contains several monophyletic groups because of significant morphological variation and a variety of diploid numbers and karyotype formulas. The objective of this study was to infer evolutionary relationships among some species of Hypostomus found in the Paraná River basin and subsequently to identify chromosomal synapomorphies in the groupings formed. Two nuclear genes, rag1 and rag2, and two mitochondrial genes, mt-co1 and mtcyb, were used to establish evolutionary relationships. Phylogenetic trees were inferred using the maximum likelihood (ML) method for mt-co1 and Bayesian analysis (BA) for all genes concatenated. Both phylogenetic trees showed two large monophyletic clades within Hypostomus. These clades are based on chromosome number, where haplogroup I contains individuals with 66-68 chromosomes, and haplogroup II contains species with 72-80 chromosomes. A third monophyletic haplogroup was also observed using ML, formed by H. faveolus and H. cochliodon, which present 2n = 64, reinforcing the separation of groups in Hypostomus by diploid number. Robertsonian rearrangements were responsible for forming the different diploid numbers and for the diversity of karyotype formulas. The groups based on traditional morphological taxonomy are considered artificial in this study; the staining pattern, which separates the two large groups morphologically and is supported by little chromosomal evidence, was instead determined to show homoplasy. Ag-NORs are predominantly multiple and located on st/a chromosomes, along with 18S rDNA sites; 5S rDNA sites are often seen in an interstitial position, following the trend already described for vertebrates.

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Cytogenetic studies in three species of Lutjanus (Perciformes: Lutjanidae: Lutjaninae) from the Isla Margarita, Venezuela

Cited by 19 publications

References 21 publications

Cytogenetic characterization of Rhomboplites aurorubens and Ocyurus chrysurus, two monotypic genera of Lutjaninae from Cubagua Island, Venezuela, with a review of the cytogenetics of Lutjanidae (Teleostei: Perciformes)

Cytogenetic characterization of Rhomboplites aurorubens and Ocyurus chrysurus, two monotypic genera of Lutjaninae from Cubagua Island, Venezuela, with a review of the cytogenetics of Lutjanidae (Teleostei: Perciformes)

Population Structure of Lutjanus purpureus (Lutjanidae - Perciformes) on the Brazilian coast: further existence evidence of a single species of red snapper in the western Atlantic

High congruence of karyotypic and molecular data on Hypostomus species from Brazilian southeast

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