Meiotic behavior and H3K4m distribution in B chromosomes of Characidium gomesi (Characiformes, Crenuchidae)

Serrano, Érica Alves; Araya-Jaime, Cristian; Suárez-Villota, Elkin Y.; Oliveira, Cláudio; Foresti, Fausto

doi:10.3897/compcytogen.v10i2.7939

Cited by 5 publications

(8 citation statements)

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“…Cases where B chromosomes pair with each other to form bivalents, trivalents, and multivalents have been reported in literature (e.g. Pauls and Bertollo, 1983 ; Dias et al, 1998 ; Basheva et al, 2010 ; Serrano et al., 2016 ). This element frequently forms a univalent in cells with only one B chromosome, resulting in irregular meiosis.…”

Section: Introductionmentioning

confidence: 99%

Meiotic self-pairing of the Psalidodon (Characiformes, Characidae) iso-B chromosome: A successful perpetuation mechanism

et al. 2021

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B chromosomes are non-essential additional genomic elements present in several animal and plant species. In fishes, species of the genus Psalidodon (Characiformes, Characidae) harbor great karyotype diversity, and multiple populations carry different types of non-essential B chromosomes. This study analyzed how the dispensable supernumerary B chromosome of Psalidodon paranae behaves during meiosis to overcome checkpoints and express its own meiosis-specific genes. We visualized the synaptonemal complexes of P. paranae individuals with zero, one, or two B chromosomes using immunodetection with anti-medaka SYCP3 antibody and fluorescence in situ hybridization with a (CA) 15 microsatellite probe. Our results showed that B chromosomes self-pair in cells containing only one B chromosome. In cells with two identical B chromosomes, these elements remain as separate synaptonemal complexes or close self-paired elements in the nucleus territory. Overall, we reveal that B chromosomes can escape meiotic silencing of unsynapsed chromatin through a self-pairing process, allowing expression of their own genes to facilitate regular meiosis resulting in fertile individuals. This behavior, also seen in other congeneric species, might be related to their maintenance throughout the evolutionary history of Psalidodon .

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Section: Introductionmentioning

confidence: 99%

Meiotic self-pairing of the Psalidodon (Characiformes, Characidae) iso-B chromosome: A successful perpetuation mechanism

et al. 2021

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“…Among genomes of fish species bearing B chromosomes, the genus Characidium Reinhardt, 1867 exhibits interesting cytogenetic features; the B chromosomes probably originated independently in the different species of this group, whereas the heteromorphic ZZ/ZW sex chromosomes seem to have originated once in the genus. Therefore, the B chromosomes of Characidium oiticicai Travassos, 1967 originated interspecifically, whereas in Characidium gomesi Travassos, 1956 and Characidium pterostictum Gomes, 1947, these elements have an intraspecific origin from the sex chromosomes ( Pansonato-Alves et al 2014 , Serrano et al 2016 ). In the present study, a novel occurrence of B chromosomes is described for Characidium alipioi , a species in which these elements were not found until now.…”

Section: Introductionmentioning

confidence: 99%

Origin of B chromosomes in Characidium alipioi (Characiformes, Crenuchidae) and its relationship with supernumerary chromosomes in other Characidium species

Serrano

Utsunomia

Scudeller

et al. 2017

CCG

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B chromosomes are apparently dispensable components found in the genomes of many species that are mainly composed of repetitive DNA sequences. Among the numerous questions concerning B chromosomes, the origin of these elements has been widely studied. To date, supernumerary chromosomes have been identified in approximately 60 species of fish, including species of the genus Characidium Reinhardt, 1867 in which these elements appear to have independently originated. In this study, we used molecular cytogenetic techniques to investigate the origin of B chromosomes in a population of Characidium alipioi Travassos, 1955 and determine their relationship with the extra chromosomes of other species of the genus. The results showed that the B chromosomes of Characidium alipioi had an intraspecific origin, apparently originated independently in relation to the B chromosomes of Characidium gomesi Travassos, 1956 Characidium pterostictum Gomes, 1947 and Characidium oiticicai Travassos, 1967, since they do not share specific DNA sequences, as well as their possible ancestral chromosomes and belong to different phylogenetic clades. The shared sequences between the supernumerary chromosomes and the autosommal sm pair indicate the origin of these chromosomes.

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“…aff. C. vidali displayed similar repetitive DNA sequences among B and sex chromosomes ( Pansonato-Alves et al 2014 , Pazian et al 2014 , Scacchetti et al 2015a , Serrano et al 2016 ), while Characidium oiticicai Travassos, 1967 and C. alipioi did not show such shared sequences ( Pansonato-Alves et al 2014 , Serrano et al 2017 , respectively). Despite their molecular homology, it was demonstrated that B and W chromosomes do not form multivalent pairings during meiosis in male and female C. gomesi individuals.…”

Section: Supernumerary and Sex Chromosomes In Characidiummentioning

confidence: 98%

“…Meiotic analyses revealed the bivalent pairing of the ZW chromosomes, as well as the bivalent plus one univalent formation in specimens carrying three B chromosomes ( Serrano et al 2016 ). Chromosome pairing does not always indicate complete homology between chromosomes ( Ramsey and Schemske 2002 ).…”

Section: Supernumerary and Sex Chromosomes In Characidiummentioning

confidence: 99%

“…These probes were later applied to chromosome painting in Characidium using a C. gomesi W-specific probe ( Machado et al 2011 , Pazian et al 2013 , 2014 , Pansonato-Alves et al 2014 , Pucci et al 2014 ). This was followed by investigations of homologous regions between the sex pairs, B chromosomes and autosomes ( Machado et al 2011 , Pazian et al 2013 , 2014 , Pansonato-Alves et al 2014 , Pucci et al 2014 , 2016 , Scacchetti et al 2015a , 2015b , Serrano et al 2016 , 2017 ), and the cloning of a W-specific sequence that generated the CgW9 clone, which is similar to the zebrafish Helitron transposon ( Pazian et al 2014 ).…”

Section: Perspectives On Characidium Investigamentioning

confidence: 99%

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The karyotypes and evolution of ZZ/ZW sex chromosomes in the genus Characidium (Characiformes, Crenuchidae)

Pucci

Nogaroto

Bertollo

et al. 2018

CCG

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Available data on cytotaxonomy of the genus Characidium Reinhardt, 1867, which contains the greatest number of species in the Characidiinae (Crenuchidae), with 64 species widely distributed throughout the Neotropical region, were summarized and reviewed. Most Characidium species have uniform diploid chromosome number (2n) = 50 and karyotype with 32 metacentric (m) and 18 submetacentric (sm) chromosomes. The maintenance of the 2n and karyotypic formula in Characidium implies that their genomes did not experience large chromosomal rearrangements during species diversification. In contrast, the internal chromosomal organization shows a dynamic differentiation among their genomes. Available data indicated the role of repeated DNA sequences in the chromosomal constitution of the Characidium species, particularly, in sex chromosome differentiation. Karyotypes of the most Characidium species exhibit a heteromorphic ZZ/ZW sex chromosome system. The W chromosome is characterized by high rates of repetitive DNA accumulation, including satellite, microsatellite, and transposable elements (TEs), with a varied degree of diversification among species. In the current review, the main Characidium cytogenetic data are presented, highlighting the major features of its karyotype and sex chromosome evolution. Despite the conserved karyotypic macrostructure with prevalent 2n = 50 chromosomes in Characidium, herein we grouped the main cytogenetic information which led to chromosomal diversification in this Neotropical fish group.

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Meiotic behavior and H3K4m distribution in B chromosomes of Characidium gomesi (Characiformes, Crenuchidae)

Cited by 5 publications

References 72 publications

Meiotic self-pairing of the Psalidodon (Characiformes, Characidae) iso-B chromosome: A successful perpetuation mechanism

Meiotic self-pairing of the Psalidodon (Characiformes, Characidae) iso-B chromosome: A successful perpetuation mechanism

Origin of B chromosomes in Characidium alipioi (Characiformes, Crenuchidae) and its relationship with supernumerary chromosomes in other Characidium species

The karyotypes and evolution of ZZ/ZW sex chromosomes in the genus Characidium (Characiformes, Crenuchidae)

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