A5034046867- Chromosomal and Genetic Variations
- Fish biology, ecology, and behavior
- Fish Biology and Ecology Studies
- Animal Genetics and Reproduction
- CRISPR and Genetic Engineering
- Genetic diversity and population structure
- Genetic and Clinical Aspects of Sex Determination and Chromosomal Abnormalities
- Genomics and Phylogenetic Studies
- Identification and Quantification in Food
- Advanced biosensing and bioanalysis techniques
- Ichthyology and Marine Biology
- Aquaculture disease management and microbiota
- Parasite Biology and Host Interactions
- Fish Ecology and Management Studies
- Evolution and Genetic Dynamics
- Genomic variations and chromosomal abnormalities
- Morphological variations and asymmetry
- Environmental Toxicology and Ecotoxicology
- Reproductive biology and impacts on aquatic species
- MicroRNA in disease regulation
- Congenital heart defects research
- Turtle Biology and Conservation
- Crustacean biology and ecology
- Marine and fisheries research
- Molecular Biology Techniques and Applications
Universidade Federal de São Carlos
2015-2024
University of Miami
2024
Khon Kaen University
2024
Universidade do Estado de Mato Grosso
2016
Friedrich Schiller University Jena
2016
Jena University Hospital
2016
Coordenação de Aperfeicoamento de Pessoal de Nível Superior
2016
Ministry of Education
2016
Universidade Federal do Rio Grande do Norte
2016
Universidade Federal do Paraná
2008
Karyotype and chromosomal characteristics from 3 allopatric populations of <i>Hoplias malabaricus</i>, cytogenetically the most studied Erythrinidae taxon, were investigated using different staining techniques (C-, Ag-, CMA<sub>3</sub> banding) as well fluorescent in situ hybridization (FISH) to detect 18S rDNA, 5S 5S<i>Hin</i>dIII satellite DNA sites. The isolation, cloning characterization an rDNA probe <i>H. malabaricus</i> genome also...
SUMMARYParodon hilarii, a neotropical fish species of the family Parodontidae, presents well-differentiated ZZ/ZW system, with W chromosome being largest in complement and mostly heterochromatic. A review sex is presented some aspects their differentiation are discussed, emphasis on Parodontidae.
SUMMARYA study was carried out on mitotic and meiotic chromosomes of four species the genus Astyanax (Pisces, Characidae) from three different water basins in State São Paulo, Brazil. The following karyotypic characteristics were observed: A. bimaculatus, 2n = 50 (n 25, FN 86–88); fasciatus, 46 23, 90); « fasciatus » Juquià river, 48 24, 94); schubarti, 36 18, 70) scabripinnis paranae, 90–92). diversity number morphology suggests a model non-conservative evolution this genus, with chromosome...
Nucleolar organizer regions (NORs) were studied in mitotic chromosomes of four species fish family Parodontidae: Parodon tortuosus, Apareiodon affinis, ibitiensis, and piracicabae. All exhibited only a single nucleolar chromosome pair their karyotypes. Intraspecific differences observed the size these chromosomes; however, not very clear for A. affinis piracicabae, piracicabae two clearly visible NORs each chromosomes, which was configuration practically found this species. This trait...
Distribution of 12 mono-, di- and tri-nucleotide microsatellites on the chromosomes 2 karyomorphs with distinct sex chromosome systems (a simple XX/XY - karyomorph B a multiple X(1)X(1)X(2)X(2)/X(1)X(2)Y D) in Hoplias malabaricus, commonly referred to as wolf fish, was studied using their physical mapping fluorescence situ hybridization (FISH). The distribution patterns different along varied considerably. Strong signals were observed at subtelomeric heterochromatic regions several...
Approximately 90 species in the genus <i>Leporinus</i> (Characiformes, Anostomidae) are known, and most of them do not present differentiated sex chromosomes. However, there is a group 7 that share heteromorphic ZW system. In all these species, W chromosome largest one karyotype mostly heterochromatic. We investigated distribution several microsatellites genome 4 possess Our results showed very large accumulation on This finding supports presence an interconnection between...
The Erythrinidae family (Teleostei: Characiformes) is a small Neotropical fish group with wide distribution throughout South America, where Hoplias malabaricus corresponds to the most widespread and cytogenetically studied taxon. This species possesses significant genetic variation, as well huge karyotype diversity among populations, reflected by its seven major forms (i.e. karyomorphs A-G) identified up now. Although morphological differences in their bodies are not outstanding, H. easily...
Astyanax fasciatus may be characterized as a chromosomally diversified 'species' presenting distinct cytotypes, each with its specific variants. The sympatric and syntopic occurrence of different cytotypes reinforces the hypothesis in which A. represent group species currently placed under single common designation. Specimens from three collection points spread along Mogi-Guaçu River southeast Brazil were examined present work: (1) near headwaters (Ouro Fino--MG), (2) middle region river...
Cytogenetic studies were made in two populations of Hoplias sp. (Pisces, Erythrinidae) from the Lobo Reservoir, State São Paulo, Brazil, and Aripuanã River, Mato Grosso, Brazil. The show evidences multiple sex chromosomes. animals Reservoir has an X1X1X2X2/X1X2Y mechanism, those River XX/XY1Y2 this representing first such case described for fishes.
SUMMARYThe karyotype of the fish Apereiodon affinis shows 2n = 54 chromosomes for male and 55 female. The data obtained suggest a mechanism multiple sex ZZ/ZW1W2 type, where chromosome Z may be number 1 in complement W1 W2 are morphologically undifferentiated. This is first probable occurrence this type to described fishes.
Repetitive DNA sequences play an important role in the structural and functional organization of chromosomes, especially sex chromosome differentiation. The genus Triportheus represents interesting model for such studies because all its species analyzed so far contain a ZZ/ZW system. A close relationship has been found between differentiation W heterochromatinization, with involvement different types repetitive this process. This study investigated several aspects association trifurcatus (2n...
Although fishes exhibit the greatest biodiversity among vertebrates, a large percentage of this fauna is still underexplored on evolutionary cytogenetic questions, particularly miniature species. The Lebiasinidae family particular example for such case. This study first one presenting differential methods, as C-banding, repetitive DNAs mapping, comparative genomic hybridization (CGH), and whole chromosome painting in lebiasinid Pyrrhulina australis aff. were deeply investigated concerning...
Harttia comprises an armored catfish genus endemic to the Neotropical region, including 27 valid species with low dispersion rates that are restricted small distribution areas. Cytogenetics data point a wide chromosomal diversity in this due changes occurred isolated populations, fusions and fissions explaining 2n number variation. In addition, different multiple sex chromosome systems rDNA loci location also found some species. However, several populations remain be investigated. study,...