Cytogenetic divergence in two sympatric fish species of the genus Astyanax Baird and Girard, 1854 (Characiformes, Characidae) from northeastern Brazil

Medrado, Aline S.; Ribeiro, Mavione Souza; Affonso, Paulo Roberto Antunes de Mello; Carneiro, Paulo Luız Souza; Costa, Marco A. Dalla

doi:10.1590/s1415-47572012005000075

Cited by 6 publications

(2 citation statements)

References 21 publications

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“…Most fishes studied have a diploid complement of 48 acro-centric chromosomes (O'CONNOR, 2008;KLINKHARDT et al, 1995;SOLA et al, 1998). However, in some taxa, close species have been reported showing changes in chromosome numbers and formula (BRUM, 1996;MEDRADO et al, 2012). OZOUF-COSTAZ et al, (1997) reported that the diploid chromosome number in most fishes varies from 2n=22 to 2n = 260.…”

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confidence: 99%

Using cytogenetic analysis RAPD in determination of genetic variations among four species of ornamental fishes of family: Poecilidae (Order: Cyprinodontiform)

2015

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The karyological and molecular analysis of four fresh water fish species of Family: Poecilidae and their genetic relationships have been studied. Xiphophorus maculates and Xiphophorus hellerii have the same diploid chromosome number 2n=48, but they were different in their karyotypes. Poecilia sphenops and Poecilia reticulata have the same diploid chromosome number 2n=46 and the same fundamental number FN=46, also the same karyotype one group of acrocentric chromosomes. Nine RAPD primers, showed monomorphic bands, were used for the construction of the dendrogram and a similarity matrix. A total of 65 bands were obtained; 39 of them were monomorphic bands. Similarity values among the studied samples ranged from 21% to 38%. High similarity value was obtained between Xiphophorus maculates and Xiphophorus hellerii. (38%) and the low similarity values were obtained between Xiphophorus hellerii and Poecilia reticulata (21%). The cluster analysis clearly differentiated Xiphophorus maculates and Xiphophorus hellerii from Poecilia sphenops and Poecilia reticulata. RAPD analysis confirmed that the four species under study are genetically different from each other. These cytogenetic data obtained can be applied for further studies in cytotaxonomy and evolutionary relationships of fishes.

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Section: Introductionmentioning

confidence: 99%

Using cytogenetic analysis RAPD in determination of genetic variations among four species of ornamental fishes of family: Poecilidae (Order: Cyprinodontiform)

2015

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“…Furthermore, chromosomal analyses in fish species can potentially provide informative markers for cytotaxonomy ( e.g. , Medrado et al , 2012 ).…”

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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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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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“More than meets the eye”: phylogeographic inferences and remarkable cryptic diversity and in endemic catfish Parotocinclus (Loricariidae: Hypoptopomatinae) from neglected and impacted basins in South America

et al. 2021

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Cytogenetic divergence in two sympatric fish species of the genus Astyanax Baird and Girard, 1854 (Characiformes, Characidae) from northeastern Brazil

Cited by 6 publications

References 21 publications

Using cytogenetic analysis RAPD in determination of genetic variations among four species of ornamental fishes of family: Poecilidae (Order: Cyprinodontiform)

Using cytogenetic analysis RAPD in determination of genetic variations among four species of ornamental fishes of family: Poecilidae (Order: Cyprinodontiform)

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

“More than meets the eye”: phylogeographic inferences and remarkable cryptic diversity and in endemic catfish Parotocinclus (Loricariidae: Hypoptopomatinae) from neglected and impacted basins in South America

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