ArticleThe Journal of heredity
Recombination and nucleotide diversity in the sex chromosomal pseudoautosomal region of the emu, Dromaius novaehollandiae.
Article in The Journal of heredity. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.
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Who cites it
14 citing papers in PubMed, 26 citations in OpenAlex.
- The evolutionary maintenance of ancient recombining sex chromosomes in the ostrich.PLoS genetics · 2023Article
- Evolutionary Dynamics of Sex Chromosomes of Paleognathous Birds.Genome biology and evolution · 2019Article
- Broad-scale recombination pattern in the primitive bird Rhea americana (Ratites, Palaeognathae).PloS one · 2017Article
- The Pseudoautosomal Regions of the U/V Sex Chromosomes of the Brown Alga Ectocarpus Exhibit Unusual Features.Molecular biology and evolution · 2015Article
- 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
- The effect of variable frequency of sexual reproduction on the genetic structure of natural populations of a cyclical parthenogen.Evolution; international journal of organic evolution · 2012Article
- Article
- Sex chromosome evolution in amniotes: applications for bacterial artificial chromosome libraries.Journal of biomedicine & biotechnology · 2011Review
- Avian Z-specific microsatellites map to pseudoautosomal or autosomal chromosomes in the Siberian jay (Perisoreus infaustus): insights into avian genome evolution from cross-species amplification tests.Journal of genetics · 2010Article
- Article
- Sex-specific population structure, natural selection, and linkage disequilibrium in a wild bird population as revealed by genome-wide microsatellite analyses.BMC evolutionary biology · 2010Article
- Integrating genomes, brain and behavior in the study of songbirds.Current biology : CB · 2009Review
- Genome evolution in Reptilia: in silico chicken mapping of 12,000 BAC-end sequences from two reptiles and a basal bird.BMC genomics · 2009Article
- Variability in sex-determining mechanisms influences genome complexity in reptilia.Cytogenetic and genome research · 2009Review
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Authors and funding
4 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Pseudoautosomal regions (PARs) shared by avian Z and W sex chromosomes are typically small homologous regions within which recombination still occurs and are hypothesized to share the properties of autosomes. We capitalized on the unusual structure of the sex chromosomes of emus, Dromaius novaehollandiae, which consist almost entirely of PAR shared by both sex chromosomes, to test this hypothesis. We compared recombination, linkage disequilibrium (LD), GC content, and nucleotide diversity between pseudoautosomal and autosomal loci derived from 11 emu bacterial artificial chromosome (BAC) clones that were mapped to chromosomes by fluorescent in situ hybridization. Nucleotide diversity (pi = 4N(e)mu) was not significantly lower in pseudoautosomal loci (14 loci, 1.9 +/- 2.4 x 10(-3)) than autosomal loci (8 loci, 4.2 +/- 6.1 x 10(-3)). By contrast, recombination per site within BAC-end sequences (rho = 4Nc) (pseudoautosomal, 3.9 +/- 6.9 x 10(-2); autosomal, 2.3 +/- 3.7 x 10(-2)) was higher and average LD (D') (pseudoautosomal, 4.2 +/- 0.2 x 10(-1); autosomal, 4.7 +/- 0.5 x 10(-1)) slightly lower in pseudoautosomal sequences. We also report evidence of deviation from a simple neutral model in the PAR and in autosomal loci, possibly caused by departures from demographic equilibrium, such as population growth. This study provides a snapshot of the population genetics of avian sex chromosomes at an early stage of differentiation.
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