Increased B chromosome frequency and absence of drive in the fish Prochilodus lineatus

Oliveira, Cláudio; Saboya, Silvia Maria Rodrigues; Foresti, Fausto; Senhorini, José Augusto; Bernardino, G

doi:10.1038/hdy.1997.186

Cited by 32 publications

(36 citation statements)

References 16 publications

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“…Cytogenetic analysis performed in the present study confirmed that there is no intraindividual variation of B chromosomes in natural population and in the F1 generation, these results are consistent with those by Oliveira et al (1997), Cavallaro et al (2000 and Voltolin et al (2010). Furthermore, we found the three types of B microchromosomes in individuals of the parental line, collected directly in the natural population, in a similar result as described by Artoni et al (2006) (Fig.…”

Section: Discussionsupporting

confidence: 81%

“…Studies performed on the inheritance patterns of supernumerary chromosomes in the specie P. lineatus by Oliveira et al (1997) and Voltolin et al (2010) reported that the transmission of microchromosomes was consistent with the Mendelian rate (k B =0.500). These data describe only the numerical frequency variation of microchromosomes B in Prochilodus.…”

Section: Discussionmentioning

confidence: 98%

“…1372 MANOLO PENITENTE et al always ranged from zero to seven (Pauls and Bertollo 1983, Oliveira et al 1997, Cavallaro et al 2000. However, Voltolin et al (2011) recently detected the presence of eight and nine supernumerary chromosomes in individuals of this species resulting from induced crossings.…”

Section: -1377mentioning

confidence: 99%

“…(Pauls and Bertollo 1983). This species presents a diploid number of 54 chromosomes of the metacentric and submetacentric types, with a fundamental number of 108 (Pauls and Bertollo 1983, Oliveira et al 1997, Cavallaro et al 2000, Artoni et al 2006, Voltolin et al 2009). Cytogenetic studies of individuals of P. lineatus captured at different locations revealed a numerical variation of supernumerary chromosomes in all populations analyzed, and the number of extra-chromosomes http://dx.doi.org/10.1590/0001-3765201387611…”

Section: Introductionmentioning

confidence: 99%

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Transmission rate variation among three B chromosome variants in the fish Prochilodus lineatus (Characiformes, Prochilodontidae)

Penitente

Voltolin

Senhorini

et al. 2013

An. Acad. Bras. Ciênc.

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Cytogenetic studies were developed in Prochilodus lineatus (Valenciennes 1836), describing an interesting system of small supernumerary chromosomes. The purpose of this work is to study the frequency and morphology of B chromosomes in individuals from the parental line and the inheritance patterns of these elements in individuals obtained from controlled crosses in the species P. lineatus. The transmission rate of B chromosomes revealed a k B =0.388 for the acrocentric type, a kB=0.507 for the metacentric type and a k B =0.526 for the submetacentric type. The obtained results raise hypothesis that B-acrocentric chromosomes are involved in an extinction process in this species, while the metacentric and submetacentric supernumerary elements comprises a neutral mechanism and follows a Mendelian transmission rate.

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Section: Discussionsupporting

confidence: 81%

Section: Discussionmentioning

confidence: 98%

Section: -1377mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Transmission rate variation among three B chromosome variants in the fish Prochilodus lineatus (Characiformes, Prochilodontidae)

Penitente

Voltolin

Senhorini

et al. 2013

An. Acad. Bras. Ciênc.

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“…However, a few species and/or populations present intraand interpopulational karyotype variation related to supernumerary microchromosomes, as seen in Prochilodus lineatus (Pauls and Bertollo, 1983;Oliveira et al, 1997;Dias et al, 1998;Maistro et al, 2000;Cavallaro et al, 2000;.…”

Section: Introductionmentioning

confidence: 99%

Cytogenetic analysis and chromosomal characteristics of the polymorphic 18S rDNA in the fish Prochilodus lineatus (Characiformes, Prochilodontidae)

et al. 2006

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We used differential staining techniques (BSG, GTG, AgNO 3 , DAPI and CMA 3 banding) and fluorescent in situ hybridization (FISH) with 5S and 18S probes to investigated the karyotypic and cytogenetic chracteristics of Prochilodus lineatus specimens from a population in Vila Velha state park (Parque Estadual de Vila Velha, Ponta Grossa, Paraná state, southern Brazil). The specimens studied showed the same karyotype as that found in other P. lineatus populations, i.e. 2n = 54 biarmed chromosomes (40m + 14 sm) and c-positive heterochromatin preferentially located pericentromerically in all chromosomes. The presence of partial or totally heterochromatic supernumerary chromosomes with numeric intra-individual variation was confirmed in the analyzed population. The nucleolar organizing regions (NORs) were interstitially situated on the long arm of chromosome pair 4 directly beneath the centromere. The differential banding techniques and FISH revealed NOR size polymorphism due to structural events such as breaks and duplication of the larger rDNA site cluster. We also observed syntenic localization of the 5S ribosomal genes in the distal segment of the 45S cluster.

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Genetics of neotropical fish: from chromosomes to populations

Oliveira

Foresti

Hilsdorf

2008

Fish Physiol Biochem

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The Neotropical freshwater fish fauna is very rich--according to the most recent catalogue 71 families and 4,475 species have been described. However, only a small amount of general information is available on the composition of Neotropical marine fishes. In Brazil, 1,298 marine species have been recorded. General analysis of available cytogenetic and population genetic data clearly indicates research has been mainly concentrated on freshwater fishes. Thus, today, cytogenetic information is available for 475 species of Characiformes, 318 species of Siluriformes, 48 species of Gymnotiformes, 199 freshwater species that do not belong to the superorder Ostariophysi, and only 109 species of marine fishes. For the species studied, only about 6% have sex chromosomes and about 5% have supernumerary or B chromosomes. A review of the cytogenetic studies shows that these data have provided valuable information about the relationships between fish groups, the occurrence of cryptic species and species complexes, the mechanism of sex determination and sex chromosome evolution, the distribution of nucleolus organizer regions, the existence supernumerary chromosomes, and the relationship between polyploidy and evolution. In relation to populations in Neotropical marine waters, the studies have shown the presence of cryptic species, which has important implications for fishery management. Different levels of genetic structuring can be found among Neotropical freshwater migratory fish species. This raises important implications for fish population genetic diversity and consequently its sustainable utilization in inland fisheries and aquaculture, specifically for conservation of ichthyo-diversity and survival.

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Increased B chromosome frequency and absence of drive in the fish Prochilodus lineatus

Cited by 32 publications

References 16 publications

Transmission rate variation among three B chromosome variants in the fish Prochilodus lineatus (Characiformes, Prochilodontidae)

Transmission rate variation among three B chromosome variants in the fish Prochilodus lineatus (Characiformes, Prochilodontidae)

Cytogenetic analysis and chromosomal characteristics of the polymorphic 18S rDNA in the fish Prochilodus lineatus (Characiformes, Prochilodontidae)

Genetics of neotropical fish: from chromosomes to populations

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