A5022594417- Chromosomal and Genetic Variations
- Fish biology, ecology, and behavior
- Fish Biology and Ecology Studies
- Genetic diversity and population structure
- Genomics and Phylogenetic Studies
- Fish Ecology and Management Studies
- Genetic and Clinical Aspects of Sex Determination and Chromosomal Abnormalities
- CRISPR and Genetic Engineering
- Animal Genetics and Reproduction
- Genetic and phenotypic traits in livestock
- Environmental Toxicology and Ecotoxicology
- Evolution and Paleontology Studies
- Wildlife Ecology and Conservation
- Genetic Mapping and Diversity in Plants and Animals
- Avian ecology and behavior
- Insect and Arachnid Ecology and Behavior
- Paleontology and Evolutionary Biology
- Trace Elements in Health
- Evolution and Genetic Dynamics
- Plant and animal studies
- Insect-Plant Interactions and Control
- Mercury impact and mitigation studies
- Aquaculture disease management and microbiota
- Ichthyology and Marine Biology
Universidade Federal de São Carlos
2009-2023
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...
Many factors have contributed to the destruction of fish habitats. Hydroelectric dams, water pollution and other environmental changes resulted in eradication natural stocks. The aim this study was detect genetic variation Prochilodus marggravii from three collection sites area influence Três Marias dam (MG) on São Francisco river (Brazil), using RAPD technique. results obtained revealed that downstream region nearest a higher similarity coefficient than those sampling may be related...
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...
Although fishes have traditionally been the subject of comparative evolutionary studies, few reports concentrated on application multipronged modern molecular cytogenetic techniques (such as genomic hybridization = CGH and whole chromosome painting WCP) to analyze deeper karyotype evolution specific groups, especially historically neglected small-sized ones. Representatives family Lebiasinidae (Characiformes) are a notable example, where only investigations conducted thus far. Here, we aim...
We present the first cytogenetic data for Lebiasinabimaculata and L.melanoguttata with aim of (1) investigating evolutionary events within Lebiasina their relationships other Lebiasinidae genera (2) checking between Ctenoluciidae. Both species have a diploid number 2n = 36 similar karyotypes microsatellite distribution patterns but contrasting C-positive heterochromatin CMA3+ banding patterns. The remarkable interstitial series occurring in is absent L.bimaculata. Accordingly, L.bimaculata...
Osteoglossiformes represents one of the most ancestral teleost lineages, currently widespread over almost all continents, except for Antarctica. However, data involving advanced molecular cytogenetics or comparative genomics are yet largely limited this fish group. Therefore, present investigations focus on osteoglossiform family Arapaimidae, studying a unique model group with cytogenetic genomic tools. The aim is to better explore and clarify certain events factors that had impact...
The Neotropical armored catfish genus Harttia presents a wide variation of chromosomal rearrangements among its representatives. Studies indicate that translocation and Robertsonian have triggered the karyotype evolution in genus, including differentiation sex chromosome systems. However, few studies used powerful tools, such as comparative whole painting, to clarify this highly diversified scenario. Here, we isolated probes from X1 (a 5S rDNA carrier) X2 45S chromosomes punctata, which...
The Neotropical genus Harttia comprises species with extensive chromosomal remodeling and distinct sex chromosome systems (SCSs). So far, three different SCSs male heterogamety have been characterized in the group. In some species, presence of XX/XY1Y2 SCS is associated a decrease diploid numbers several rearrangements, although direct relation to differentiation has not shown yet. Here, we aimed investigate processes that led establishment rare track its evolutionary history among other...
Curimbatá-pióa (Prochilodus costatus Valenciennes, 1850) is an endemic species from the São Francisco River Basin with migratory habits, important ecological role in ecosystem and relevant fishing importance. The present study aimed to assess genetic variation P. order investigate its population structure. Genetic was studied at three sites downstream Três Marias dam (Upper-middle River, State of Minas Gerais) through six specific microsatellite loci. Fish had quite similar diversity levels...
Previous genetic studies conducted with migratory fish populations from downstream of the Três Marias dam in São Francisco River Basin (Brazil) have documented occurrence population structuring, as reported for Brycon orthotaenia and Prochilodus argenteus , two commercially important species this basin. We revisited structure these using microsatellites. B. was sampled during spawning season analyzed five heterologous P. collected non-reproductive analysis ten speciesspecific For both...
Species with 'young' or nascent sex chromosomes provide unique opportunities to understand early evolutionary mechanisms (e.g. accumulation of repetitive sequences, cessation recombination and gene loss) that drive the evolution chromosomes. Among vertebrates, fishes exhibit highly diverse a wide spectrum sex-determining chromosomes, ranging from cryptic differentiated ones, as well as, simple multiple chromosome systems. Such variability in morphology composition not only exists within...
Arowanas (Osteoglossinae) are charismatic freshwater fishes with six species and two genera (Osteoglossum Scleropages) distributed in South America, Asia, Australia. In an attempt to provide a better assessment of the processes shaping their evolution, we employed set cytogenetic genomic approaches, including i) molecular analyses using C- CMA3/DAPI staining, repetitive DNA mapping, comparative hybridization (CGH), Zoo-FISH, along ii) genotypic single nucleotide polymorphisms (SNPs)...
Scleropages formosus (Osteoglossiformes, Teleostei) represents one of the most valued ornamental fishes, yet it is critically endangered due to overexploitation and habitat destruction. This species encompasses three major color groups that naturally occur in allopatric populations, but evolutionary taxonomic relationships S. varieties remain uncertain. Here, we utilized a range molecular cytogenetic techniques characterize karyotypes five phenotypes, which correspond occurring variants: red...
In addition to its wide geographical distribution, osteoglossiform fishes represent one of the most ancient freshwater teleost lineages; making it an important group for systematic and evolutionary studies. These had a Gondwanan origin their past distribution may have contributed diversity present in this group. However, cytogenetic genomic data are still scarce, difficult track trajectories within order. addition, with groups endemic different continents, hinders integrative study that...
Lebiasinidae is a Neotropical freshwater family widely distributed throughout South and Central America. Due to their often very small body size, species are cytogenetically challenging hence largely underexplored. However, the available but limited karyotype data already suggested high interspecific variability in diploid chromosome number (2n), which pronounced speciose genus Nannostomus, popular taxon ornamental fish trade due its remarkable coloration. Aiming more deeply examine...
Prochilodus is one of the most important fish resources South America, in addition to role it plays nutrient cycling Neotropical rivers. In present study, we describe isolation and characterization nine novel microsatellite loci argenteus. The number alleles per polymorphic locus varied from 5 (Par76) 21 (Par85), revealing a total 116 alleles. values observed expected heterozygosities ranged 0.629 (Par69) 0.926 (Par85 Par86) 0.643 (Par66) 0.931 (Par80), respectively. Furthermore, ability...
Hepsetidae is a small fish family with only the genus Hepsetus, six described species distributed throughout South, Central and Western regions of Africa, showing close relationship Alestidae some Neotropical families. However, no cytogenetic information available for both species, thus preventing any evolutionary comparative studies at chromosomal level. In present study, we are providing new data Hepsetus odoe, including standard karyotype, C-banding, repetitive DNAs mapping, genomic...
Abstract Notopteridae (Teleostei, Osteoglossiformes) represents an old fish lineage with ten currently recognized species distributed in African and Southeastern Asian rivers. Their karyotype structures diploid numbers remained conserved over long evolutionary periods, since lineages diverged approximately 120 Mya. However, a significant genetic diversity was already identified for these using molecular data. Thus, why the relationships within are so diverse at genomic level but terms of...
Lebiasinidae fishes have been historically neglected by cytogenetical studies. Here we present a genomic comparison in eleven species, addition to review of the ribosomal DNA sequences distribution this family. With that, develop ten sets experiments order hybridize representative species from genus Copeina, Copella, Nannostomus, and Pyrrhulina metaphase plates Lebiasina melanoguttata. Two major pathways on chromosomal evolution these can be recognized: (i) conservation 2n = 36 bi-armed...
Although crocodilians have attracted enormous attention in other research fields, from the cytogenetic point of view, this group remains understudied. Here, we analyzed karyotypes eight species formally described Alligatoridae family using differential staining, fluorescence situ hybridization with rDNA and repetitive motifs as a probe, whole chromosome painting (WCP), comparative genome hybridization. All Caimaninae diploid number (2n) 42 dominated by acrocentric chromosomes, contrast to...