| Title |
Transposable elements and early evolution of sex chromosomes in fish
|
|---|---|
| Published in |
Chromosome Research, October 2015
|
| DOI | 10.1007/s10577-015-9490-8 |
| Pubmed ID | |
| Authors |
Domitille Chalopin, Jean-Nicolas Volff, Delphine Galiana, Jennifer L. Anderson, Manfred Schartl |
| Abstract |
In many organisms, the sex chromosome pair can be recognized due to heteromorphy; the Y and W chromosomes have often lost many genes due to the absence of recombination during meiosis and are frequently heterochromatic. Repetitive sequences are found at a high proportion on such heterochromatic sex chromosomes and the evolution and emergence of sex chromosomes has been connected to the dynamics of repeats and transposable elements. With an amazing plasticity of sex determination mechanisms and numerous instances of independent emergence of novel sex chromosomes, fish represent an excellent lineage to investigate the early stages of sex chromosome differentiation, where sex chromosomes often are homomorphic and not heterochromatic. We have analyzed the composition, distribution, and relative age of TEs from available sex chromosome sequences of seven teleost fish. We observed recent bursts of TEs and simple repeat accumulations around young sex determination loci. More strikingly, we detected transposable element (TE) amplifications not only on the sex determination regions of the Y and W sex chromosomes, but also on the corresponding regions of the X and Z chromosomes. In one species, we also clearly demonstrated that the observed TE-rich sex determination locus originated from a TE-poor genomic region, strengthening the link between TE accumulation and emergence of the sex determination locus. Altogether, our results highlight the role of TEs in the initial steps of differentiation and evolution of sex chromosomes. |
X Demographics
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Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 3 | 23% |
| Spain | 1 | 8% |
| Sweden | 1 | 8% |
| Japan | 1 | 8% |
| Unknown | 7 | 54% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Scientists | 7 | 54% |
| Members of the public | 5 | 38% |
| Practitioners (doctors, other healthcare professionals) | 1 | 8% |
Mendeley readers
The data shown below were compiled from readership statistics for 92 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Norway | 2 | 2% |
| Netherlands | 1 | 1% |
| Brazil | 1 | 1% |
| Czechia | 1 | 1% |
| Russia | 1 | 1% |
| United States | 1 | 1% |
| Unknown | 85 | 92% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Ph. D. Student | 19 | 21% |
| Researcher | 14 | 15% |
| Student > Master | 14 | 15% |
| Student > Bachelor | 9 | 10% |
| Student > Doctoral Student | 8 | 9% |
| Other | 10 | 11% |
| Unknown | 18 | 20% |
| Readers by discipline | Count | As % |
|---|---|---|
| Agricultural and Biological Sciences | 37 | 40% |
| Biochemistry, Genetics and Molecular Biology | 28 | 30% |
| Environmental Science | 2 | 2% |
| Engineering | 2 | 2% |
| Sports and Recreations | 1 | 1% |
| Other | 2 | 2% |
| Unknown | 20 | 22% |
Attention Score in Context
This research output has an Altmetric Attention Score of 6. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 05 October 2017.
All research outputs
#5,423,520
of 22,829,683 outputs
Outputs from Chromosome Research
#84
of 508 outputs
Outputs of similar age
#65,297
of 274,923 outputs
Outputs of similar age from Chromosome Research
#3
of 19 outputs
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So far Altmetric has tracked 508 research outputs from this source. They typically receive a little more attention than average, with a mean Attention Score of 5.5. This one has done well, scoring higher than 83% of its peers.
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