ArticleGenetica2011
Diverse stages of sex-chromosome differentiation in tinamid birds: evidence from crossover analysis in Eudromia elegans and Crypturellus tataupa.
Article in Genetica, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.
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17 citing papers in PubMed, 35 citations in OpenAlex.
- Evolutionary dynamics of enlarged neo-sex chromosomes and novel pseudoautosomal regions in Sylvioidea songbirds.Communications biology · 2026Article
- HJ Muller and the Relationship Between Sex Chromosome Degeneration and the Evolution of Dosage Compensation.Genome biology and evolution · 2025Review
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- When did recombination suppression events occur in bird ZW sex chromosomes?Nature communications · 2025Article
- Fast and Simple Molecular Test for Sex Determination of the MonomorphicAnimals : an open access journal from MDPI · 2024Article
- Evolution of bird sex chromosomes: a cytogenomic approach in Palaeognathae species.BMC ecology and evolution · 2024Article
- Satellitome Analysis in the Southern Lapwing (Genes · 2024Article
- The timing of genetic degeneration of sex chromosomes.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2021Review
- Why Do Some Sex Chromosomes Degenerate More Slowly Than Others? The Odd Case of Ratite Sex Chromosomes.Genes · 2020Article
- Evolutionary Dynamics of Sex Chromosomes of Paleognathous Birds.Genome biology and evolution · 2019Article
- Evolution of recombination rates between sex chromosomes.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2017Review
- Sixteen kiwi (Apteryx spp) transcriptomes provide a wealth of genetic markers and insight into sex chromosome evolution in birds.BMC genomics · 2016Article
- Initiation of recombination suppression and PAR formation during the early stages of neo-sex chromosome differentiation in the Okinawa spiny rat, Tokudaia muenninki.BMC evolutionary biology · 2015Article
- Complex evolutionary trajectories of sex chromosomes across bird taxa.Science (New York, N.Y.) · 2014Article
- The evolutionary dynamics of sexually antagonistic mutations in pseudoautosomal regions of sex chromosomes.Evolution; international journal of organic evolution · 2014Article
- Avian sex, sex chromosomes, and dosage compensation in the age of genomics.Chromosome research : an international journal on the molecular, supramolecular and evolutionary aspects of chromosome biology · 2014Review
- A retroposon-based view on the temporal differentiation of sex chromosomes.Mobile genetic elements · 2012Article
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1 author at 1 institution in 1 country.
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No grant is acknowledged in the PubMed record.
Abstract
All extant birds share the same sex-chromosome system: ZZ males and ZW females with striking differences in the stages of sex-chromosome differentiation between the primitive palaeognathus ratites and the large majority of avian species grouped within neognaths. Evolutionarily close to ratites is the neotropical order Tinamiformes that has been scarcely explored regarding their ZW pair morphology and constitution. Tinamous, when compared to ratites, constitute a large group among Palaeognathae, therefore, exploring the extent of homology between the Z and W chromosomes in this group might reveal key features on the evolution of the avian sex chromosomes. We mapped MLH1 foci that are crossover markers on pachytene bivalents to determine the size and localization of the homologous region shared by the Z and W chromosomes in two tinamous: Eudromia elegans and Crypturellus tataupa. We found that the homologous (pseudoautosomal) region differ significantly in size between these two species. They both have a single recombination event on the long arm of the acrocentric Z and W chromosomes. However, in E. elegans the pseudoautosomal region occupies one-fourth of the W chromosome, while in C. tataupa it is restricted to the tip of the long arm of the W. The W chromosomes in these two species differ in their heterochromatin content: in E. elegans it shows a terminal euchromatic segment and in C. tataupa is completely heterochromatic. These results show that tinamous have ZW pairs with more diversified stages of differentiation compared to ratites. Finally, the idea that the avian proto-sex chromosomes started to diverge from the end of the long arm towards the centromere of an acrocentric pair is discussed.
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