Differentiated evolutionary pathways in Haemulidae (Perciformes): karyotype stasis versus morphological differentiation

Motta-Neto, Clóvis Coutinho da; Lima-Filho, Paulo Augusto de; Araújo, Washington Candeia de; Bertollo, Luiz Antônio Carlos; Molina, Wagner Franco

doi:10.1007/s11160-011-9236-4

Cited by 24 publications

(19 citation statements)

References 45 publications

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“…Data obtained in this study appear to indicate a lack of evolutionary synchrony between morphological changes and karyotype alterations in Selene species, which has also been suggested for other families of Perciformes Motta-Neto et al 2011c). However, this is not a universal occurrence, since distinct situations have also been observed among Perciformes.…”

Section: Discussionsupporting

confidence: 75%

“…Morphological diversification between Perciformes groups was, in many cases, not accompanied by pronounced karyotype diversification Motta-Neto et al 2011c). This has been reported in several families, including Haemulidae, which exhibits extensive numerical and structural chromosome conservatism among its species (Motta-Neto et al 2011a, b, c).…”

Section: Discussionmentioning

confidence: 97%

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Atlantic moonfishes: independent pathways of karyotypic and morphological differentiation

et al. 2012

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Fish of the genus Selene, known as lookdowns or moonfish, are one of the most morphologically derived groups of the family Carangidae, whose phylogenetic relationships are still largely unknown. In this study, we discuss karyoevolutionary aspects of three representatives of this genus from the Western Atlantic: Selene brownii (2n = 48; FN = 48), Selene setapinnis (2n = 46; FN = 48), and Selene vomer (2n = 48; FN = 50). Their body patterns were also investigated and compared to one another and in relation to two other species of different genera. Two mechanisms of karyotypic evolution seem to have acted in the diversification of this genus, namely pericentric inversions and centric fusions. Mapping of rDNA sequences showed that chromosome pairs bearing 5S rDNA sites are similar, whereas those bearing 18 rDNA sites are morphologically distinct while apparently also exhibiting interspecies synteny. Although the nucleolar organizer-bearing chromosomes are extremely efficient cytotaxonomic markers among Selene species, others cytogenetic patterns of these species are relatively conserved. Hybridization with telomeric probes (TTAGGG) n did not exhibit interstitial telomeric sites (ITS), especially in S. setapinnis, where, along with a reduction in diploid number, a large metacentric pair derived from centric fusion is present. Data obtained by geometric morphometrics enable a clear morphological distinction among the three species, as well as in relation to two other species of the genus Caranx and Oligoplites. Data obtained suggest that morphologic evolution in Selene species was primarily dissociated from visible changes that occurred at the chromosomal level.

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Section: Discussionsupporting

confidence: 75%

Section: Discussionmentioning

confidence: 97%

Atlantic moonfishes: independent pathways of karyotypic and morphological differentiation

et al. 2012

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“…In contrast, the karyotypes of some Perciformes families, although subjected to a slower evolutionary rate regarding the fixation of structural rearrangements, have revealed some hypervariable chromosomal regions, particularly those represented by ribosomal sites or positions adjacent to them (Affonso and Galetti Jr., 2005). Thus, in groups of fish with higher karyotypic stability, the mapping of the ribosomal has been particularly effective for identifying and quantifying chromosome dynamics (Motta-Neto et al, 2012), particularly among cogeneric species, as suggested by the Eucinostomus species analyzed in this study. In fact, analyses involving the mapping of 18S and 5S sequences and characterization of GC-rich regions in these species revealed diagnostic cytogenetic markers, enabling identification of unique chromosomal differences between them.…”

Section: Discussionmentioning

confidence: 95%

“…Less conserved, the mapping with 5S and 18S ribosomal sequences revealed interspecific variation thus demonstrating that ribosomal sites may be effective cytotaxonomic markers or indicate the occurrence of chromosomal rearrangements, particularly among species that show low karyotypic diversity (Motta-Neto et al, 2012). Thus, although 18S rDNA sites are single and apparently located on homeologous chromosome pairs in the 3 species analyzed (pair 22), they have different positions on the chromosomes: at the interstitial position in E. argenteus and E. melanopterus and at the terminal position of the short arm in E. gula; these results suggest intrachromosomal rearrangements.…”

Section: Discussionmentioning

confidence: 99%

“…Together with macrostructural features, some chromosomal traits of Eucinostomus appear to be highly conserved, such as simple Ag-NOR sites (C + /GC + /DAPI -) and pericentromeric heterochromatin regions. Marine Perciformes exhibit a high karyotypic stability in some groups, with evidence of karyotypic stasis (Molina, 2007), where the cytogenetic differences fall short of phenotypic variation between closely related species (Motta-Neto et al, 2012). In contrast, the karyotypes of some Perciformes families, although subjected to a slower evolutionary rate regarding the fixation of structural rearrangements, have revealed some hypervariable chromosomal regions, particularly those represented by ribosomal sites or positions adjacent to them (Affonso and Galetti Jr., 2005).…”

Section: Discussionmentioning

confidence: 99%

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Evolutionary dynamics of rDNA genes on chromosomes of the Eucinostomus fishes: cytotaxonomic and karyoevolutive implications

et al. 2014

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ABSTRACT. Several chromosomal features of Gerreidae fish have been found to be conserved. In this group, it is unclear whether the high degree of chromosomal stasis is maintained when analyzing more dynamic regions of chromosomes, such as rDNA sites that generally show a higher level of variability. Thus, cytogenetic analyses were performed on 3 Atlantic species of the genus Eucinostomus using conventional banding (C-banding, Ag-NOR), AT-and GC-specific fluorochromes, and fluorescence in situ hybridization mapping of telomeric sequences and 5S and 18S rDNA sites. The results showed that although the karyotypical macrostructure of these species is similar (2n = 48 chromosomes, simple Ag-NORs seemingly located on homeologous chromosomes and centromeric heterochromatin pattern), there are differences in the positions of rDNA subunits 5S and 18S. Thus, the ribosomal sites have demonstrated to be effective cytotaxonomic markers in Eucinostomus, presenting a different evolutionary dynamics in relation to other chromosomal regions and allowing access to important evolutionary changes in this group.

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Integrative Cytogenetics, A Conservation Approach in Atlantic Fish: Concepts, Estimates, and Uses

Molina,

da Motta-Neto,

da Costa

2023

Conservation Genetics in the Neotropics

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Differentiated evolutionary pathways in Haemulidae (Perciformes): karyotype stasis versus morphological differentiation

Cited by 24 publications

References 45 publications

Atlantic moonfishes: independent pathways of karyotypic and morphological differentiation

Atlantic moonfishes: independent pathways of karyotypic and morphological differentiation

Evolutionary dynamics of rDNA genes on chromosomes of the Eucinostomus fishes: cytotaxonomic and karyoevolutive implications

Integrative Cytogenetics, A Conservation Approach in Atlantic Fish: Concepts, Estimates, and Uses

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