Cytogenetic divergence between two sympatric species of Characidium (Teleostei, Characiformes, Crenuchidae) from the Machado River, Minas Gerais, Brazil

Silva, Alexandre Rodrigues; Maistro, Edson Luis

doi:10.1590/s1415-47572006000300010

Cited by 8 publications

(5 citation statements)

References 24 publications

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“…zebra (out of seven populations analysed) and C . oiticicai (only one population analysed) [28] , [33] , [54] , [55] , [29] , [30] , [31] . The B chromosomes observed in these species were all mitotically unstable, but exhibited some differences regarding shape and heterochromatin distribution [28] , [30] , as expected for genomic elements evolving in separate species.…”

Section: Discussionmentioning

confidence: 99%

Single Origin of Sex Chromosomes and Multiple Origins of B Chromosomes in Fish Genus Characidium

et al. 2014

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Chromosome painting with DNA probes obtained from supernumerary (B) and sex chromosomes in three species of fish genus Characidium (C. gomesi, C. pterostictum and C. oiticicai) showed a close resemblance in repetitive DNA content between B and sex chromosomes in C. gomesi and C. pterostictum. This suggests an intraspecific origin for B chromosomes in these two species, probably deriving from sex chromosomes. In C. oiticicai, however, a DNA probe obtained from its B chromosome hybridized with the B but not with the A chromosomes, suggesting that the B chromosome in this species could have arisen interspecifically, although this hypothesis needs further investigation. A molecular phylogenetic analysis performed on nine Characidium species, with two mtDNA genes, showed that the presence of heteromorphic sex chromosomes in these species is a derived condition, and that their origin could have been unique, a conclusion also supported by interspecific chromosome painting with a CgW probe derived from the W chromosome in C. gomesi. Summing up, our results indicate that whereas heteromorphic sex chromosomes in the genus Characidium appear to have had a common and unique origin, B chromosomes may have had independent origins in different species. Our results also show that molecular phylogenetic analysis is an excellent complement for cytogenetic studies by unveiling the direction of evolutionary chromosome changes.

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Section: Discussionmentioning

confidence: 99%

Single Origin of Sex Chromosomes and Multiple Origins of B Chromosomes in Fish Genus Characidium

et al. 2014

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“…To date, among the Characidium species, only C. zebra and C. cf. lagosantense have not shown heteromorphic sex chromosomes (da Silva & Maistro, ; Pansonato‐Alves, Oliveira & Foresti, ; Pazian et al ., ). Characidium zebra shows the second metacentric pair, which is the pair hypothesized to be related to the origin of the sex system.…”

Section: Discussionmentioning

confidence: 99%

Population differentiation and speciation in the genusCharacidium(Characiformes: Crenuchidae): effects of reproductive and chromosomal barriers

Pucci

Barbosa

Nogaroto

et al. 2014

Biol J Linn Soc Lond

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Both time and low gene flow are the key factors by which different biological species arise. The divergence process among lineages and the development of pre-or postzygotic isolation occur when gene flow events are lacking. The separation among species of the genus Characidium was analysed in relation to the geomorphological mechanisms in river courses, events of captured adjacent upland drainages in south-eastern Brazil, and sex chromosome differences. The ZZ/ZW sex chromosomes of Characidium vary in size, morphology, degree of heterochromatinization, and presence/absence of ribosomal DNA. The goal of this study was to understand the mechanism of sex chromosome differentiation, its close association with the geological history of cladogenetic events among drainages, and reproductive isolation leading to Characidium speciation. The W-specific probe from Characidium gomesi generated a highlighted signal on the entire W chromosome of C. gomesi, Characidium heirmostigmata, Characidium pterostictum, and Characidium sp., instead of karyotypes of three Characidium aff. zebra populations, which showed scattered signals. An evolutionary and biogeographic landscape arose by analysis of ribosomal DNA site location and differentiation of the sex chromosomes, which established mechanisms of reproductive isolation leading to meiotic barriers, keeping the biological unit distinct even if the contact among species was restored.

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“…The root of this analysis is coded as polymorphic for the characters 363, 364, and 365 because the number of chromosomes in the Cypriniformes usually ranges between 48 and 52. This character was coded from the literature (Arefjev, 1990a, b;Artoni & Bertollo, 2002;Bellafronte et al, 2005;Bertollo et al, 1986;Carvalho et al, 2002;Centofante et al, 2003;Cestari & Galetti, 1992;Falcão & Bertollo, 1985;Foresti et al, 1989;Galetti Jr. et al, 1981;;Hinegardner & Rosen, 1972 ;Kirby et al, 1977;Paintner-Marques et al, 2002;Pauls & Bertollo, 1984;Portela et al, 1988;Porto et al, 1992;Silva & Maistro, 2006). Different numbers of chromosomes were reported for several species, which might indicate identification problems.…”

Section: Sperm Storage Area On Testes: (0) Absent or Small; (1) Presementioning

confidence: 99%

Phylogeny of the family Characidae (Teleostei: Characiformes): from characters to taxonomy

2010

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The family Characidae is the most diverse among Neotropical fishes. Systematics of this family are mainly based on precladistic papers, and only recently a phylogenetic hypothesis for Characidae was proposed by the author. That phylogeny was based on 360 morphological characters studied for 160 species, including representatives of families related to Characidae. This paper is based on that phylogenetic analysis, with the analyzed characters described herein and documented, accompanied by comparisons of their definition and coding in previous papers. Synapomorphies of each node of the proposed phylogeny are listed, comparisons with previous classifications provided, and autapomorphies of the analyzed species listed. Taxonomic implications of the proposed classification and the position of the incertae sedis genera within Characidae are discussed. A discussion of the phylogenetic information of the characters used in the classical systematics of the Characidae is provided.La familia Characidae es la más diversa entre los peces neotropicales. La sistemática de esta familia está basada principalmente en trabajos pre-cladísticos, y sólo recientemente una hipótesis filogenética para Characidae fue propuesta por el autor. Esa filogenia estaba basada en 360 caracteres estudiados en 160 especies, incluyendo representantes de familias relacionadas a Characidae. Este trabajo está basado en ese análisis filogenético, y los caracteres analizados son aquí descriptos y documentados, comparando su definición y codificación con trabajos previos. Las sinapomorfías de cada nodo de la filogenia propuesta son listadas, y se incluyen comparaciones con clasificaciones previas; también se listan las autapomorfías de las especies analizadas. Las implicancias taxonómicas de la clasificación propuesta y la posición de los géneros incertae sedis dentro de Characidae son discutidas. También se presenta una discusión de la información filogenética de los caracteres usados en la sistemática clásica de Characidae.

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Cytogenetic divergence between two sympatric species of Characidium (Teleostei, Characiformes, Crenuchidae) from the Machado River, Minas Gerais, Brazil

Cited by 8 publications

References 24 publications

Single Origin of Sex Chromosomes and Multiple Origins of B Chromosomes in Fish Genus Characidium

Single Origin of Sex Chromosomes and Multiple Origins of B Chromosomes in Fish Genus Characidium

Population differentiation and speciation in the genusCharacidium(Characiformes: Crenuchidae): effects of reproductive and chromosomal barriers

Phylogeny of the family Characidae (Teleostei: Characiformes): from characters to taxonomy

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