A multiple sex-chromosome system in Antarctic ice-fishes

Morescalchi, A.; Hureau, J. C.; Olmo, Ettore; Ozouf−Costaz, Catherine; Pisano, Eva; Stanyon, Roscoe

doi:10.1007/bf00237962

Cited by 41 publications

(40 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At least 20 species belonging to the orders Cypriniformes, Cyprinodontiformes, Perciformes, Salmoniformes and Tetraodontiformes are distinguished by remarkable XXAAY/XAA Y = or ZZAA=/ZAA W Y sex chromosomes (for reviews see Moreira et al, 1980;Almeida-Toledo et al, 1984Saitoh, 1989;Morescalchi et al, 1992aMorescalchi et al, , 1992b. In all these fishes, the original free Y or W sex chromosomes have become attached to an autosome either by a centric fusion (like in E. maussi), or alternatively by a tandem fusion.…”

Section: Discussionmentioning

confidence: 99%

Chromosome banding in Amphibia

Schmid

Feichtinger

Steinlein

et al. 2002

Cytogenet Genome Res

View full text Add to dashboard Cite

A 15-year cytogenetic survey on one population of the leaf litter frog Eleutherodactylus maussi in northern Venezuela confirmed the existence of multiple XXAA♂/XAA^Y♀ sex chromosomes which originated by a centric (Robertsonian) fusion between the original Y chromosome and an autosome. 95% of the male individuals in this population are carriers of this Y-autosome fusion. In male meiosis the XAA^Y sex chromosomes pair in the expected trivalent configuration. In the same population, 5% of the male animals still possess the original, free XY sex chromosomes. In a second population of E. maussi analyzed, all male specimens are characterized by these ancestral XY chromosomes which form normal bivalents in meiosis. E. maussi apparently represents the first vertebrate species discovered in which a derived Y-autosome fusion still coexists with the ancestral free XY sex chromosomes. The free XY sex chromosomes, as well as the multiple XA^Y sex chromosomes are still in a very primitive (homomorphic) stage of differentiation. With no banding technique applied it is possible to distinguish the Y from the X. DNA flow cytometric measurements show that the genome of E. maussi is among the largest in the anuran family Leptodactylidae. The present study also supplies further data on differential chromosome banding and fluorescence in situ hybridization experiments in this amphibian species.

show abstract

Section: Discussionmentioning

confidence: 99%

Chromosome banding in Amphibia

Schmid

Feichtinger

Steinlein

et al. 2002

Cytogenet Genome Res

View full text Add to dashboard Cite

show abstract

“…The suppression of intra-chromosomal recombination between homologs carrying sex-determining genes allows further degeneration of the Y or W chromosome by accumulation of deleterious mutations and repetitive non-coding sequences (Singh et al 1980, Charlesworth andCharlesworth 2000). The same considerations apply to multiple sex chromosome systems in fish that derive mainly from centric fusions and, to a lesser extent, tandem fusions (Morescalchi et al 1990, Bertollo et al 1997, Bertollo and Mestriner 1998, Caputo et al 2001, Cioffi and Bertollo 2010.…”

Section: Bs and Sex Chromosomes Accumulation In Fish Genomesmentioning

confidence: 99%

Preferential accumulation of sex and Bs chromosomes in biarmed karyotypes by meiotic drive and rates of chromosomal changes in fishes

Molina

Martínez

Bertollo

et al. 2014

An. Acad. Bras. Ciênc.

View full text Add to dashboard Cite

Mechanisms of accumulation based on typical centromeric drive or of chromosomes carrying pericentric inversions are adjusted to the general karyotype differentiation in the principal Actinopterygii orders. Here, we show that meiotic drive in fish is also supported by preferential establishment of sex chromosome systems and B chromosomes in orders with predominantly bi-brachial chromosomes. The mosaic of trends acting at an infra-familiar level in fish could be explained as the interaction of the directional process of meiotic drive as background, modulated on a smaller scale by adaptive factors or specific karyotypic properties of each group, as proposed for the orthoselection model.

show abstract

“…Among the channichthyids, C. hamatus exhibited a banding pattern similar to the one observed by Morescalchi et al (1992), with centromeric bands on the acrocentrics, an interstitial band on the long arm of the Y chromosome and a pericentromeric band on a small acrocentric (Fig. 3A).…”

Section: Variability In the Nucleolar Organiser Regionmentioning

confidence: 92%

“…As in nearly all channichthyids, the karyotype of P. macropterus consists of 48 chromosomes; however, it differs from the others for a higher fundamental number due to the presence of numerous chromosomes endowed with a minute small arm (Ozouf-Costaz et al, 1991;Morescalchi et al, 1992). The vast majority of these small arms exhibit C-banding and stain for DAPI, suggesting that they contain AT-rich highly repetitive DNA.…”

Section: Variability In the Nucleolar Organiser Regionmentioning

confidence: 99%

“…In fact, except for the Nototheniidae and for some bathydraconid species, nearly all the species of the other families have a 48-chromosome karyotype (Morescalchi et al, 1997;Prirodina, 1997;Ozouf-Costaz et al, 1999b, Pisano et al, 2000 which is common in teleosts (Klinkhardt et al, 1995) and is considered basic in these fishes (Ohno, 1974;Sola et al, 1981). However, a certain degree of variability has been observed in the amount and localisation of heterochromatin (Morescalchi, 1992;Morescalchi et al, 1992Morescalchi et al, , 1996Ozouf-Costaz et al, 1997;Pisano et al, 2000Pisano et al, , 2001, and to a lesser extent, in the position of the nucleolar organiser (NOR) (Ozouf-Costaz et al, 1996, 1997Pisano et al, 1998Pisano et al, , 2000.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Chromosomal studies on ten species of notothenioid fishes (Notothenioidei: Bathydraconidae, Channichthyidae, Nototheniidae)

Caputo

Cerioni

Splendiani

et al. 2002

Cytogenet Genome Res

Self Cite

View full text Add to dashboard Cite

The results of a cytogenetic study conducted with banding and in situ hybridization techniques using ribosomal and telomeric probes on various species belonging to three families (Bathydraconidae, Channichthyidae and Nototheniidae) of the perciform suborder, Notothenioidei, are reported. The heterochromatin distribution and composition, nucleolar organiser and localisation of telomeric sequences seem to indicate that both in karyologically conservative families such as channichthyids and in families exhibiting greater karyological variability, certain DNA fractions like ribosomal genes and centromeric and telomeric DNAs are prone to some variability. This could play an important role in favouring or hampering chromosome rearrangements.

show abstract

A multiple sex-chromosome system in Antarctic ice-fishes

Cited by 41 publications

References 21 publications

Chromosome banding in Amphibia

Chromosome banding in Amphibia

Preferential accumulation of sex and Bs chromosomes in biarmed karyotypes by meiotic drive and rates of chromosomal changes in fishes

Chromosomal studies on ten species of notothenioid fishes (Notothenioidei: Bathydraconidae, Channichthyidae, Nototheniidae)

Contact Info

Product

Resources

About