Against the mainstream: exceptional evolutionary stability of ZW sex chromosomes across the fish families Triportheidae and Gasteropelecidae (Teleostei: Characiformes)

Yano, Cássia Fernanda; Sember, Alexandr; Kretschmer, Rafael; Bertollo, Luiz Antônio Carlos; Ezaz, Tariq; Hatanaka, Terumi; Liehr, Thomas; Ráb, Petr; Al-Rikabi, Ahmed; Viana, Patrik Ferreira; Feldberg, Eliana; Oliveira, Ezequiel Aguiar de; Toma, Gustavo Akira; Cioffi, Marcelo de Bello

doi:10.1007/s10577-021-09674-1

Cited by 13 publications

(25 citation statements)

References 116 publications

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“…Among fish, species with conserved karyotype macrostructures are also reported to have a variable pattern of genomic organization, as observed for Lebiasina [ 58 ], for the giant trahiras [ 36 ] and for some Osteoglossiformes species [ 59 ]. Differentiated sex chromosomes also seem to play an important role in the divergence of repetitive genomic regions, since species that show such characteristics also have distinct patterns of hybridization in CGH, as observed in armored catfish [ 60 ], trahiras [ 61 ], pencilfish [ 62 ] and characiforms with a stable ZZ/ZW sex chromosome system [ 63 ]. In fact, the role of sex chromosomes in genomic divergence among related species is not well established.…”

Section: Discussionmentioning

confidence: 99%

Integrating Cytogenetics and Population Genomics: Allopatry and Neo-Sex Chromosomes May Have Shaped the Genetic Divergence in the Erythrinus erythrinus Species Complex (Teleostei, Characiformes)

Souza

Sassi

Ferreira

et al. 2022

Biology

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Diversity found in Neotropical freshwater fish is remarkable. It can even hinder a proper delimitation of many species, with the wolf fish Erythrinus erythrinus (Teleostei, Characiformes) being a notable example. This nominal species shows remarkable intra-specific variation, with extensive karyotype diversity found among populations in terms of different diploid chromosome numbers (2n), karyotype compositions and sex chromosome systems. Here, we analyzed three distinct populations (one of them cytogenetically investigated for the first time) that differed in terms of their chromosomal features (termed karyomorphs) and by the presence or absence of heteromorphic sex chromosomes. We combined cytogenetics with genomic approaches to investigate how the evolution of multiple sex chromosomes together with allopatry is linked to genetic diversity and speciation. The results indicated the presence of high genetic differentiation among populations both from cytogenetic and genomic aspects, with long-distance allopatry potentially being the main agent of genetic divergence. One population showed a neo-X1X2Y sexual chromosome system and we hypothesize that this system is associated with enhanced inter-population genetic differentiation which could have potentially accelerated speciation compared to the effect of allopatry alone.

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Section: Discussionmentioning

confidence: 99%

Integrating Cytogenetics and Population Genomics: Allopatry and Neo-Sex Chromosomes May Have Shaped the Genetic Divergence in the Erythrinus erythrinus Species Complex (Teleostei, Characiformes)

Souza

Sassi

Ferreira

et al. 2022

Biology

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“…The method was used in different fish species with varied success (e.g. [19,55,56,61]). CGH highlighted centromeric regions but did not reveal any chromosomal segments labelled preferably by male genomic probe in N. furzeri and N. kadleci populations (Figs 2, S8 and S10).…”

Section: Discussionmentioning

confidence: 99%

“…The ratio of the probe vs. blocking DNA (see below) was chosen based on previous experience with the CGH method in other fishes (e.g. [19,56,61]). The final probe mixture for each slide was prepared by mixing male and female genomic probes (500 ng each), 6 μg of female-derived competitive DNA and 50 µg of sonicated salmon sperm DNA (Sigma-Aldrich).…”

Section: Probes For Comparative Genomic Hybridization (Cgh)mentioning

confidence: 99%

“…In teleost fishes, about 500 sex chromosome systems have been identified so far [16][17][18][19] and references therein). Regardless of their evolutionary age, the majority of these systems is homomorphic, i.e.…”

Section: Introductionmentioning

confidence: 99%

“…Accumulation of Nfu-SatC on Y chromosomes was probably facilitated by a low level of recombination along the q-arms of the Y chromosome as repetitive DNA in general populates these regions due to relaxed purifying selection[68- 70]. Several repetitive DNA classes including microsatellites and satDNA have been found to accumulate in region of divergence on heterogametic sex chromosome in fishes[19,[71][72][73][74][75].…”

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confidence: 99%

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Sex chromosome differentiation via changes in the Y chromosome repeat landscape in African annual killifishes Nothobranchius furzeri and N. kadleci

Štundlová

Kreklova

Lukšíková

et al. 2022

Preprint

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Repetitive DNA represents an important driver of sex chromosome differentiation. Yet, repetitive sequences tend to be misrepresented or overlooked in genomic studies. We analysed repetitive DNA landscape of sex chromosomes in several populations of a turquoise killifish Nothobranchius furzeri and its sister species N. kadleci (Teleostei: Nothobranchiidae), representatives of African annual killifishes with high rate of karyotype and sex chromosome evolution. We combined bioinformatic analyses of repeatome with molecular cytogenetic techniques such as comparative genomic hybridization, fluorescence in situ hybridization with satellite sequences, genes for ribosomal RNAs (rDNA) and bacterial artificial chromosomes (BACs) and immunostaining of SYCP3 and MLH1 proteins, which marked lateral elements of synaptonemal complexes and recombination sites, respectively. We revealed that N. furzeri and N. kadleci share the XY sex chromosome system, which is thus much older than previously assumed. Sex chromosomes are mostly heteromorphic as evidenced by distinct distribution of satellite DNAs and major rDNA. Yet, the heteromorphic XY sex chromosomes pair almost exclusively regularly in meiosis, which implies synaptic adjustment. Physical mapping of BACs identified inversions on Y chromosomes of the N. kadleci populations, akin to the pattern previously reported in N. furzeri. Yet, repetitive DNA landscape of X and Y sex chromosomes either diverged in parallel in populations of both species or it evolved in their common ancestor and thus predates the inversions. The observed differentiation via repeat repatterning thus cannot be explained by the classical sexually antagonistic model. Rather, we hypothesized that relaxed meiotic drive and recombination reduced by neutral processes could drive changes in repeatome and secondary inversions could be maintained by sexually antagonistic regulatory effects resulting from early evolution of dosage compensation.

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Integrating Genomic and Cytogenetic Data to Study the Evolutionary History of Arapaimas and Arowanas in the Neotropics

Perez,

Toma,

Souza

et al. 2023

Conservation Genetics in the Neotropics

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Against the mainstream: exceptional evolutionary stability of ZW sex chromosomes across the fish families Triportheidae and Gasteropelecidae (Teleostei: Characiformes)

Cited by 13 publications

References 116 publications

Integrating Cytogenetics and Population Genomics: Allopatry and Neo-Sex Chromosomes May Have Shaped the Genetic Divergence in the Erythrinus erythrinus Species Complex (Teleostei, Characiformes)

Integrating Cytogenetics and Population Genomics: Allopatry and Neo-Sex Chromosomes May Have Shaped the Genetic Divergence in the Erythrinus erythrinus Species Complex (Teleostei, Characiformes)

Sex chromosome differentiation via changes in the Y chromosome repeat landscape in African annual killifishes Nothobranchius furzeri and N. kadleci

Integrating Genomic and Cytogenetic Data to Study the Evolutionary History of Arapaimas and Arowanas in the Neotropics

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