---
_id: '20833'
abstract:
- lang: eng
  text: Sex-chromosome systems are highly variable across animals, but how they transition
    from one to another is not well understood. Diptera have undergone multiple sex-chromosome
    turnovers and expansions while maintaining their general chromosomal content,
    which makes them an ideal clade to study such transitions. We analysed more than
    100 dipteran whole-genome assemblies and identified 4 new lineages that underwent
    sex-chromosome turnover (in addition to the 5 previously reported). We find the
    majority of turnovers happened in the group Schizophora, which tend to have fewer
    genes on the F element (the chromosome homologous to the ancestral insect X chromosome)
    than lower dipterans, a factor previously hypothesized to facilitate turnover.
    Most derived X chromosomes have higher GC content than autosomes, consistent with
    a high prevalence of male-achiasmy in Diptera. In addition, an excess of gene
    movement out of the X is detected for most of these new X chromosomes, and many
    of these moved genes have high testis expression in Drosophila, suggesting that
    out-of-X gene movement contributes to the long-term demasculinization of X chromosomes.
article_processing_charge: No
author:
- first_name: Lorena Alexandra
  full_name: Layana Franco, Lorena Alexandra
  id: 02814589-eb8f-11eb-b029-a70074f3f18f
  last_name: Layana Franco
  orcid: 0000-0002-1253-6297
- first_name: Melissa A
  full_name: Toups, Melissa A
  id: 4E099E4E-F248-11E8-B48F-1D18A9856A87
  last_name: Toups
  orcid: 0000-0002-9752-7380
- first_name: Beatriz
  full_name: Vicoso, Beatriz
  id: 49E1C5C6-F248-11E8-B48F-1D18A9856A87
  last_name: Vicoso
  orcid: 0000-0002-4579-8306
citation:
  ama: Layana Franco LA, Toups MA, Vicoso B. Research Data for “Causes and consequences
    of sex-chromosome turnovers in Diptera.” 2026. doi:<a href="https://doi.org/10.15479/AT-ISTA-20833">10.15479/AT-ISTA-20833</a>
  apa: Layana Franco, L. A., Toups, M. A., &#38; Vicoso, B. (2026). Research Data
    for “Causes and consequences of sex-chromosome turnovers in Diptera.” Institute
    of Science and Technology Austria. <a href="https://doi.org/10.15479/AT-ISTA-20833">https://doi.org/10.15479/AT-ISTA-20833</a>
  chicago: Layana Franco, Lorena Alexandra, Melissa A Toups, and Beatriz Vicoso. “Research
    Data for ‘Causes and Consequences of Sex-Chromosome Turnovers in Diptera.’” Institute
    of Science and Technology Austria, 2026. <a href="https://doi.org/10.15479/AT-ISTA-20833">https://doi.org/10.15479/AT-ISTA-20833</a>.
  ieee: L. A. Layana Franco, M. A. Toups, and B. Vicoso, “Research Data for ‘Causes
    and consequences of sex-chromosome turnovers in Diptera.’” Institute of Science
    and Technology Austria, 2026.
  ista: Layana Franco LA, Toups MA, Vicoso B. 2026. Research Data for ‘Causes and
    consequences of sex-chromosome turnovers in Diptera’, Institute of Science and
    Technology Austria, <a href="https://doi.org/10.15479/AT-ISTA-20833">10.15479/AT-ISTA-20833</a>.
  mla: Layana Franco, Lorena Alexandra, et al. <i>Research Data for “Causes and Consequences
    of Sex-Chromosome Turnovers in Diptera.”</i> Institute of Science and Technology
    Austria, 2026, doi:<a href="https://doi.org/10.15479/AT-ISTA-20833">10.15479/AT-ISTA-20833</a>.
  short: L.A. Layana Franco, M.A. Toups, B. Vicoso, (2026).
corr_author: '1'
date_created: 2025-12-17T10:10:57Z
date_published: 2026-01-08T00:00:00Z
date_updated: 2026-06-10T09:21:49Z
day: '8'
department:
- _id: BeVi
doi: 10.15479/AT-ISTA-20833
file:
- access_level: open_access
  checksum: 0b79be6229f2ad9ac117ef00fc4f5c0e
  content_type: text/plain
  creator: llayanaf
  date_created: 2025-12-17T10:09:25Z
  date_updated: 2025-12-17T10:09:25Z
  file_id: '20834'
  file_name: README.txt
  file_size: 1201
  relation: main_file
  success: 1
- access_level: open_access
  checksum: daf1c03149dd170b14e5c8e109ee3c77
  content_type: application/zip
  creator: llayanaf
  date_created: 2025-12-17T10:10:11Z
  date_updated: 2025-12-17T10:10:11Z
  file_id: '20835'
  file_name: Supplementary_Datasets.zip
  file_size: 19052849
  relation: main_file
  success: 1
- access_level: open_access
  checksum: 251e7aab01917c2ad2fbccf465492ea1
  content_type: application/zip
  creator: llayanaf
  date_created: 2025-12-17T10:12:05Z
  date_updated: 2025-12-17T10:12:05Z
  file_id: '20837'
  file_name: Perl_scripts.zip
  file_size: 4575
  relation: main_file
  success: 1
- access_level: open_access
  checksum: 3cabf143b8cd286eae48c598da2b03bd
  content_type: application/zip
  creator: llayanaf
  date_created: 2026-01-08T01:35:08Z
  date_updated: 2026-01-08T01:35:08Z
  file_id: '20959'
  file_name: Supplementary_Tables.zip
  file_size: 572362
  relation: main_file
  success: 1
file_date_updated: 2026-01-08T01:35:08Z
fulldoi: https://doi.org/10.15479/AT-ISTA-20833
has_accepted_license: '1'
keyword:
- Schizophora
- sex chromosomes
- sex-chromosome turnover
- Diptera
- genomic features
- out-of-X movement.
license: https://creativecommons.org/licenses/by/4.0/
month: '01'
oa: 1
oa_version: Published Version
publisher: Institute of Science and Technology Austria
status: public
title: Research Data for 'Causes and consequences of sex-chromosome turnovers in Diptera'
tmp:
  image: /images/cc_by.png
  legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
  name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
  short: CC BY (4.0)
type: research_data
user_id: 68b8ca59-c5b3-11ee-8790-cd641c68093d
year: '2026'
...
---
_id: '21116'
abstract:
- lang: eng
  text: Sex-chromosome systems are highly variable across animals, but how they transition
    from one to another is not well understood. Diptera have undergone multiple sex-chromosome
    turnovers and expansions while maintaining their general chromosomal content,
    which makes them an ideal clade to study such transitions. We analyzed more than
    100 dipteran whole-genome assemblies and identified 4 new lineages that underwent
    sex-chromosome turnover (in addition to the 5 previously reported). We find that
    the majority of turnovers happened in the group Schizophora, which tend to have
    fewer genes on Muller element F (the chromosome homologous to the ancestral insect
    X chromosome) than lower dipterans, a factor previously hypothesized to facilitate
    turnover. Most derived X chromosomes have higher GC content than autosomes, consistent
    with a high prevalence of male achiasmy in Diptera. In addition, an excess of
    gene movement out of the X is detected for most of these new X chromosomes, and
    many of these moved genes have high testis expression in Drosophila, suggesting
    that out-of-X gene movement contributes to the long-term demasculinization of
    X chromosomes.
article_processing_charge: No
author:
- first_name: Lorena Alexandra
  full_name: Layana Franco, Lorena Alexandra
  id: 02814589-eb8f-11eb-b029-a70074f3f18f
  last_name: Layana Franco
  orcid: 0000-0002-1253-6297
- first_name: Melissa A
  full_name: Toups, Melissa A
  id: 4E099E4E-F248-11E8-B48F-1D18A9856A87
  last_name: Toups
  orcid: 0000-0002-9752-7380
- first_name: Beatriz
  full_name: Vicoso, Beatriz
  id: 49E1C5C6-F248-11E8-B48F-1D18A9856A87
  last_name: Vicoso
  orcid: 0000-0002-4579-8306
citation:
  ama: Layana Franco LA, Toups MA, Vicoso B. Research Data for “Causes and consequences
    of sex-chromosome turnovers in Diptera.” 2026. doi:<a href="https://doi.org/10.15479/AT-ISTA-21116">10.15479/AT-ISTA-21116</a>
  apa: Layana Franco, L. A., Toups, M. A., &#38; Vicoso, B. (2026). Research Data
    for “Causes and consequences of sex-chromosome turnovers in Diptera.” Institute
    of Science and Technology Austria. <a href="https://doi.org/10.15479/AT-ISTA-21116">https://doi.org/10.15479/AT-ISTA-21116</a>
  chicago: Layana Franco, Lorena Alexandra, Melissa A Toups, and Beatriz Vicoso. “Research
    Data for ‘Causes and Consequences of Sex-Chromosome Turnovers in Diptera.’” Institute
    of Science and Technology Austria, 2026. <a href="https://doi.org/10.15479/AT-ISTA-21116">https://doi.org/10.15479/AT-ISTA-21116</a>.
  ieee: L. A. Layana Franco, M. A. Toups, and B. Vicoso, “Research Data for ‘Causes
    and consequences of sex-chromosome turnovers in Diptera.’” Institute of Science
    and Technology Austria, 2026.
  ista: Layana Franco LA, Toups MA, Vicoso B. 2026. Research Data for ‘Causes and
    consequences of sex-chromosome turnovers in Diptera’, Institute of Science and
    Technology Austria, <a href="https://doi.org/10.15479/AT-ISTA-21116">10.15479/AT-ISTA-21116</a>.
  mla: Layana Franco, Lorena Alexandra, et al. <i>Research Data for “Causes and Consequences
    of Sex-Chromosome Turnovers in Diptera.”</i> Institute of Science and Technology
    Austria, 2026, doi:<a href="https://doi.org/10.15479/AT-ISTA-21116">10.15479/AT-ISTA-21116</a>.
  short: L.A. Layana Franco, M.A. Toups, B. Vicoso, (2026).
corr_author: '1'
date_created: 2026-01-30T11:04:14Z
date_published: 2026-01-02T00:00:00Z
date_updated: 2026-02-12T12:58:00Z
day: '2'
department:
- _id: BeVi
doi: 10.15479/AT-ISTA-21116
file:
- access_level: open_access
  checksum: 0b79be6229f2ad9ac117ef00fc4f5c0e
  content_type: text/plain
  creator: llayanaf
  date_created: 2026-01-30T11:00:24Z
  date_updated: 2026-01-30T11:00:24Z
  file_id: '21117'
  file_name: README.txt
  file_size: 1201
  relation: main_file
  success: 1
- access_level: open_access
  checksum: a3cda72e4177fa1e5d3f0f6a88f8a79b
  content_type: application/zip
  creator: llayanaf
  date_created: 2026-01-30T11:00:36Z
  date_updated: 2026-01-30T11:00:36Z
  file_id: '21118'
  file_name: Supplementary_Tables.zip
  file_size: 572403
  relation: main_file
  success: 1
- access_level: open_access
  checksum: efb5b64698d6ca9e7b675204f6fc1c29
  content_type: application/zip
  creator: llayanaf
  date_created: 2026-01-30T11:00:48Z
  date_updated: 2026-01-30T11:00:48Z
  file_id: '21119'
  file_name: Supplementary_Datasets.zip
  file_size: 19054553
  relation: main_file
  success: 1
- access_level: open_access
  checksum: 254e050f648e9783ba8fe11adb3b49db
  content_type: application/zip
  creator: llayanaf
  date_created: 2026-01-30T11:00:56Z
  date_updated: 2026-01-30T11:00:56Z
  file_id: '21120'
  file_name: Perl_scripts.zip
  file_size: 4575
  relation: main_file
  success: 1
file_date_updated: 2026-01-30T11:00:56Z
fulldoi: https://doi.org/10.15479/AT-ISTA-21116
has_accepted_license: '1'
keyword:
- Schizophora
- sex chromosomes
- sex-chromosome turnover
- Diptera
- genomic features
- out-of-X movement.
month: '01'
oa: 1
oa_version: Published Version
publisher: Institute of Science and Technology Austria
status: public
title: Research Data for "Causes and consequences of sex-chromosome turnovers in Diptera"
tmp:
  image: /images/cc_by.png
  legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
  name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
  short: CC BY (4.0)
type: research_data
user_id: 68b8ca59-c5b3-11ee-8790-cd641c68093d
year: '2026'
...
---
_id: '20780'
abstract:
- lang: eng
  text: Sex-chromosome systems are highly variable across animals, but how they transition
    from one to another is not well understood. Diptera have undergone multiple sex-chromosome
    turnovers and expansions while maintaining their general chromosomal content,
    which makes them an ideal clade to study such transitions. We analysed more than
    100 dipteran whole-genome assemblies and identified 4 new lineages that underwent
    sex-chromosome turnover (in addition to the 5 previously reported). We find the
    majority of turnovers happened in the group Schizophora, which tend to have fewer
    genes on the F element (the chromosome homologous to the ancestral insect X chromosome)
    than lower dipterans, a factor previously hypothesized to facilitate turnover.
    Most derived X chromosomes have higher GC content than autosomes, consistent with
    a high prevalence of male-achiasmy in Diptera. In addition, an excess of gene
    movement out of the X is detected for most of these new X chromosomes, and many
    of these moved genes have high testis expression in Drosophila, suggesting that
    out-of-X gene movement contributes to the long-term demasculinization of X chromosomes.
acknowledged_ssus:
- _id: ScienComp
article_processing_charge: No
author:
- first_name: Lorena Alexandra
  full_name: Layana Franco, Lorena Alexandra
  id: 02814589-eb8f-11eb-b029-a70074f3f18f
  last_name: Layana Franco
  orcid: 0000-0002-1253-6297
- first_name: Melissa A
  full_name: Toups, Melissa A
  id: 4E099E4E-F248-11E8-B48F-1D18A9856A87
  last_name: Toups
  orcid: 0000-0002-9752-7380
- first_name: Beatriz
  full_name: Vicoso, Beatriz
  id: 49E1C5C6-F248-11E8-B48F-1D18A9856A87
  last_name: Vicoso
  orcid: 0000-0002-4579-8306
citation:
  ama: Layana Franco LA, Toups MA, Vicoso B. Causes and consequences of sex-chromosome
    turnovers in Diptera. 2025. doi:<a href="https://doi.org/10.15479/AT-ISTA-20780">10.15479/AT-ISTA-20780</a>
  apa: Layana Franco, L. A., Toups, M. A., &#38; Vicoso, B. (2025). Causes and consequences
    of sex-chromosome turnovers in Diptera. Institute of Science and Technology Austria.
    <a href="https://doi.org/10.15479/AT-ISTA-20780">https://doi.org/10.15479/AT-ISTA-20780</a>
  chicago: Layana Franco, Lorena Alexandra, Melissa A Toups, and Beatriz Vicoso. “Causes
    and Consequences of Sex-Chromosome Turnovers in Diptera.” Institute of Science
    and Technology Austria, 2025. <a href="https://doi.org/10.15479/AT-ISTA-20780">https://doi.org/10.15479/AT-ISTA-20780</a>.
  ieee: L. A. Layana Franco, M. A. Toups, and B. Vicoso, “Causes and consequences
    of sex-chromosome turnovers in Diptera.” Institute of Science and Technology Austria,
    2025.
  ista: Layana Franco LA, Toups MA, Vicoso B. 2025. Causes and consequences of sex-chromosome
    turnovers in Diptera, Institute of Science and Technology Austria, <a href="https://doi.org/10.15479/AT-ISTA-20780">10.15479/AT-ISTA-20780</a>.
  mla: Layana Franco, Lorena Alexandra, et al. <i>Causes and Consequences of Sex-Chromosome
    Turnovers in Diptera</i>. Institute of Science and Technology Austria, 2025, doi:<a
    href="https://doi.org/10.15479/AT-ISTA-20780">10.15479/AT-ISTA-20780</a>.
  short: L.A. Layana Franco, M.A. Toups, B. Vicoso, (2025).
corr_author: '1'
date_created: 2025-12-10T23:40:14Z
date_published: 2025-12-01T00:00:00Z
date_updated: 2026-06-10T08:27:48Z
department:
- _id: BeVi
doi: 10.15479/AT-ISTA-20780
file:
- access_level: open_access
  checksum: 251e7aab01917c2ad2fbccf465492ea1
  content_type: application/zip
  creator: llayanaf
  date_created: 2025-12-11T10:47:15Z
  date_updated: 2025-12-11T10:47:15Z
  file_id: '20799'
  file_name: Perl_scripts.zip
  file_size: 4575
  relation: main_file
  success: 1
- access_level: open_access
  checksum: daf1c03149dd170b14e5c8e109ee3c77
  content_type: application/zip
  creator: llayanaf
  date_created: 2025-12-11T10:52:17Z
  date_updated: 2025-12-11T10:52:17Z
  file_id: '20800'
  file_name: Supplementary_Datasets.zip
  file_size: 19052849
  relation: main_file
  success: 1
- access_level: open_access
  checksum: 658d6e95a361b0a3db058b7b4e1733d4
  content_type: application/zip
  creator: llayanaf
  date_created: 2025-12-11T10:52:11Z
  date_updated: 2025-12-11T10:52:11Z
  file_id: '20801'
  file_name: Supplementary_Tables.zip
  file_size: 566476
  relation: main_file
  success: 1
- access_level: open_access
  checksum: 2a2b92eb9fade0015719190596a8c5b7
  content_type: text/plain
  creator: llayanaf
  date_created: 2025-12-11T11:00:53Z
  date_updated: 2025-12-11T11:00:53Z
  file_id: '20802'
  file_name: README.txt
  file_size: 1204
  relation: main_file
  success: 1
file_date_updated: 2025-12-11T11:00:53Z
fulldoi: https://doi.org/10.15479/AT-ISTA-20780
has_accepted_license: '1'
keyword:
- Schizophora
- sex chromosomes
- sex-chromosome turnover
- Diptera
- genomic features
- out-of-X movement.
month: '12'
oa: 1
oa_version: Published Version
publisher: Institute of Science and Technology Austria
status: public
title: Causes and consequences of sex-chromosome turnovers in Diptera
tmp:
  image: /images/cc_by.png
  legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
  name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
  short: CC BY (4.0)
type: research_data
user_id: 68b8ca59-c5b3-11ee-8790-cd641c68093d
year: '2025'
...
---
OA_embargo: '6'
OA_place: publisher
_id: '18531'
abstract:
- lang: eng
  text: "Sex chromosomes and autosomes exhibit very different evolutionary dynamics.\r\nThe
    Y chromosome usually degenerates, leaving many X-linked loci hemizygous in\r\nmales.
    Since recessive X-linked mutations are always exposed to selection in males,\r\nselection
    is more efficient on the X chromosome than on autosomes on recessive\r\nmutations,
    leading to faster adaptation on the X chromosome than other genomic\r\nregions,
    if beneficial mutations are on average recessive (known as the Faster-X\r\neffect).
    In the presence of the functional, but non-recombining gametolog on the Y (as\r\nis
    often the case in young non-recombining regions), recessive mutations are\r\nsheltered
    from selection on the X chromosome. We model this scenario and show that\r\nthe
    efficiency of selection is reduced on diploid X loci due to sheltering by the
    Y\r\nchromosome. Reduced efficiency of selection leads to slower adaptation and\r\nincreased
    accumulation of deleterious mutations (Slower-X effect). We extended this\r\nmodel
    to explore the effect of sex-specific selection on degeneration of sex\r\nchromosomes,
    showing theoretically that male-limited genes degenerate on the X\r\nchromosome
    and female-biased genes degenerate on the Y chromosome. This\r\nprediction depends
    on the effective population size and the mutation rate, explaining\r\nthe variety
    of sex chromosome degeneration patterns observed in nature.\r\nTo test for direct
    evidence of a Slower-X (or Slower-Z) effect, we analyzed the\r\nZW sex chromosomes
    of the flatworm Schistosoma japonicum, which have a very\r\nyoung non-recombining
    region with non-degenerated W. Diploid Z-linked genes have\r\nhigher ratios of
    non-synonymous to synonymous polymorphisms than autosomal\r\ngenes, supporting
    reduced efficiency of selection on the diploid Z region. These results\r\nprovide
    evidence of sheltering by the W chromosome, a mechanism that could\r\ncontribute
    to Z (X) chromosome degeneration, and illustrate contrasting evolutionary\r\npatterns
    in old and young sex chromosome regions. In addition, genes with sexspecific patterns
    of expression show opposite patterns of selection in the young\r\n(diploid) and
    old (hemizygous) Z, showing the complex manner in which sex-specific selection
    shapes the evolutionary patterns of sex chromosomes. "
acknowledged_ssus:
- _id: ScienComp
- _id: CampIT
alternative_title:
- ISTA Thesis
article_processing_charge: No
author:
- first_name: Andrea
  full_name: Mrnjavac, Andrea
  id: 353FAC84-AE61-11E9-8BFC-00D3E5697425
  last_name: Mrnjavac
citation:
  ama: Mrnjavac A. Early stages of sex chromosome evolution. 2024. doi:<a href="https://doi.org/10.15479/at:ista:18531">10.15479/at:ista:18531</a>
  apa: Mrnjavac, A. (2024). <i>Early stages of sex chromosome evolution</i>. Institute
    of Science and Technology Austria. <a href="https://doi.org/10.15479/at:ista:18531">https://doi.org/10.15479/at:ista:18531</a>
  chicago: Mrnjavac, Andrea. “Early Stages of Sex Chromosome Evolution.” Institute
    of Science and Technology Austria, 2024. <a href="https://doi.org/10.15479/at:ista:18531">https://doi.org/10.15479/at:ista:18531</a>.
  ieee: A. Mrnjavac, “Early stages of sex chromosome evolution,” Institute of Science
    and Technology Austria, 2024.
  ista: Mrnjavac A. 2024. Early stages of sex chromosome evolution. Institute of Science
    and Technology Austria.
  mla: Mrnjavac, Andrea. <i>Early Stages of Sex Chromosome Evolution</i>. Institute
    of Science and Technology Austria, 2024, doi:<a href="https://doi.org/10.15479/at:ista:18531">10.15479/at:ista:18531</a>.
  short: A. Mrnjavac, Early Stages of Sex Chromosome Evolution, Institute of Science
    and Technology Austria, 2024.
corr_author: '1'
date_created: 2024-11-11T08:40:45Z
date_published: 2024-11-11T00:00:00Z
date_updated: 2026-07-29T08:36:28Z
day: '11'
ddc:
- '576'
degree_awarded: PhD
department:
- _id: GradSch
- _id: BeVi
doi: 10.15479/at:ista:18531
file:
- access_level: closed
  checksum: 3e48b163c22114ef5d5371f758668289
  content_type: application/vnd.openxmlformats-officedocument.wordprocessingml.document
  creator: amrnjava
  date_created: 2024-11-13T12:15:28Z
  date_updated: 2025-05-11T22:30:04Z
  embargo_to: open_access
  file_id: '18551'
  file_name: AMrnjavac_thesis_library.docx
  file_size: 26870629
  relation: source_file
  title: Early stages of sex chromosome evolution
- access_level: open_access
  checksum: 3ead60c1b678e7dcf018043aef3b5db2
  content_type: application/pdf
  creator: amrnjava
  date_created: 2024-11-13T12:15:54Z
  date_updated: 2025-05-11T22:30:04Z
  embargo: 2025-05-11
  file_id: '18552'
  file_name: AMrnjavac_thesis_library.pdf
  file_size: 4228766
  relation: main_file
  title: Early stages of sex chromosome evolution
file_date_updated: 2025-05-11T22:30:04Z
fulldoi: https://doi.org/10.15479/at:ista:18531
has_accepted_license: '1'
keyword:
- Sex chromosomes
- evolution
- selection
- sheltering
language:
- iso: eng
license: https://creativecommons.org/licenses/by-nc-nd/4.0/
month: '11'
oa: 1
oa_version: Published Version
page: '181'
publication_identifier:
  issn:
  - 2663-337X
publication_status: published
publisher: Institute of Science and Technology Austria
related_material:
  record:
  - id: '12521'
    relation: part_of_dissertation
    status: public
  - id: '18549'
    relation: part_of_dissertation
    status: public
status: public
supervisor:
- first_name: Beatriz
  full_name: Vicoso, Beatriz
  id: 49E1C5C6-F248-11E8-B48F-1D18A9856A87
  last_name: Vicoso
  orcid: 0000-0002-4579-8306
title: Early stages of sex chromosome evolution
tmp:
  image: /images/cc_by_nc_nd.png
  legal_code_url: https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode
  name: Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
    (CC BY-NC-ND 4.0)
  short: CC BY-NC-ND (4.0)
type: dissertation
user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd
year: '2024'
...
---
_id: '10167'
abstract:
- lang: eng
  text: Schistosomes, the human parasites responsible for snail fever, are female-heterogametic.
    Different parts of their ZW sex chromosomes have stopped recombining in distinct
    lineages, creating “evolutionary strata” of various ages. Although the Z-chromosome
    is well characterized at the genomic and molecular level, the W-chromosome has
    remained largely unstudied from an evolutionary perspective, as only a few W-linked
    genes have been detected outside of the model species Schistosoma mansoni. Here,
    we characterize the gene content and evolution of the W-chromosomes of S. mansoni
    and of the divergent species S. japonicum. We use a combined RNA/DNA k-mer based
    pipeline to assemble around 100 candidate W-specific transcripts in each of the
    species. About half of them map to known protein coding genes, the majority homologous
    to S. mansoni Z-linked genes. We perform an extended analysis of the evolutionary
    strata present in the two species (including characterizing a previously undetected
    young stratum in S. japonicum) to infer patterns of sequence and expression evolution
    of W-linked genes at different time points after recombination was lost. W-linked
    genes show evidence of degeneration, including high rates of protein evolution
    and reduced expression. Most are found in young lineage-specific strata, with
    only a few high expression ancestral W-genes remaining, consistent with the progressive
    erosion of nonrecombining regions. Among these, the splicing factor u2af2 stands
    out as a promising candidate for primary sex determination, opening new avenues
    for understanding the molecular basis of the reproductive biology of this group.
acknowledged_ssus:
- _id: ScienComp
acknowledgement: The authors thank IT support at IST Austria for providing an optimal
  environment for bioinformatic analyses. This work was supported by an Austrian Science
  Foundation FWF grant (Project P28842) to B.V.
article_processing_charge: No
article_type: original
author:
- first_name: Marwan N
  full_name: Elkrewi, Marwan N
  id: 0B46FACA-A8E1-11E9-9BD3-79D1E5697425
  last_name: Elkrewi
  orcid: 0000-0002-5328-7231
- first_name: Mikhail A.
  full_name: Moldovan, Mikhail A.
  id: c8bb7f32-3315-11ec-b58b-e5950e6c14a0
  last_name: Moldovan
  orcid: 0000-0002-8876-6494
- first_name: Marion A L
  full_name: Picard, Marion A L
  id: 2C921A7A-F248-11E8-B48F-1D18A9856A87
  last_name: Picard
  orcid: 0000-0002-8101-2518
- first_name: Beatriz
  full_name: Vicoso, Beatriz
  id: 49E1C5C6-F248-11E8-B48F-1D18A9856A87
  last_name: Vicoso
  orcid: 0000-0002-4579-8306
citation:
  ama: Elkrewi MN, Moldovan MA, Picard MAL, Vicoso B. Schistosome W-linked genes inform
    temporal dynamics of sex chromosome evolution and suggest candidate for sex determination.
    <i>Molecular Biology and Evolution</i>. 2021;138(12):5345-5358. doi:<a href="https://doi.org/10.1093/molbev/msab178">10.1093/molbev/msab178</a>
  apa: Elkrewi, M. N., Moldovan, M. A., Picard, M. A. L., &#38; Vicoso, B. (2021).
    Schistosome W-linked genes inform temporal dynamics of sex chromosome evolution
    and suggest candidate for sex determination. <i>Molecular Biology and Evolution</i>.
    Oxford University Press. <a href="https://doi.org/10.1093/molbev/msab178">https://doi.org/10.1093/molbev/msab178</a>
  chicago: Elkrewi, Marwan N, Mikhail A. Moldovan, Marion A L Picard, and Beatriz
    Vicoso. “Schistosome W-Linked Genes Inform Temporal Dynamics of Sex Chromosome
    Evolution and Suggest Candidate for Sex Determination.” <i>Molecular Biology and
    Evolution</i>. Oxford University Press, 2021. <a href="https://doi.org/10.1093/molbev/msab178">https://doi.org/10.1093/molbev/msab178</a>.
  ieee: M. N. Elkrewi, M. A. Moldovan, M. A. L. Picard, and B. Vicoso, “Schistosome
    W-linked genes inform temporal dynamics of sex chromosome evolution and suggest
    candidate for sex determination,” <i>Molecular Biology and Evolution</i>, vol.
    138, no. 12. Oxford University Press, pp. 5345–58, 2021.
  ista: Elkrewi MN, Moldovan MA, Picard MAL, Vicoso B. 2021. Schistosome W-linked
    genes inform temporal dynamics of sex chromosome evolution and suggest candidate
    for sex determination. Molecular Biology and Evolution. 138(12), 5345–58.
  mla: Elkrewi, Marwan N., et al. “Schistosome W-Linked Genes Inform Temporal Dynamics
    of Sex Chromosome Evolution and Suggest Candidate for Sex Determination.” <i>Molecular
    Biology and Evolution</i>, vol. 138, no. 12, Oxford University Press, 2021, pp.
    5345–58, doi:<a href="https://doi.org/10.1093/molbev/msab178">10.1093/molbev/msab178</a>.
  short: M.N. Elkrewi, M.A. Moldovan, M.A.L. Picard, B. Vicoso, Molecular Biology
    and Evolution 138 (2021) 5345–58.
corr_author: '1'
das_tickbox: '1'
date_created: 2021-10-21T07:49:12Z
date_published: 2021-06-19T00:00:00Z
date_updated: 2026-09-13T22:30:29Z
day: '19'
ddc:
- '610'
department:
- _id: BeVi
doi: 10.1093/molbev/msab178
external_id:
  isi:
  - '000741368600009'
  pmid:
  - '34146097'
file:
- access_level: open_access
  checksum: 1b096702fb356d9c0eb88e1b3fcff5f8
  content_type: application/pdf
  creator: dernst
  date_created: 2022-05-06T09:47:18Z
  date_updated: 2022-05-06T09:47:18Z
  file_id: '11352'
  file_name: 2021_MolecularBiolEvolution_Elkrewi.pdf
  file_size: 1008594
  relation: main_file
  success: 1
file_date_updated: 2022-05-06T09:47:18Z
fulldoi: https://doi.org/10.1093/molbev/msab178
has_accepted_license: '1'
intvolume: '       138'
isi: 1
issue: '12'
keyword:
- sex chromosomes
- evolutionary strata
- W-linked gene
- sex determining gene
- schistosome parasites
language:
- iso: eng
month: '06'
oa: 1
oa_version: Published Version
page: 5345-58
pmid: 1
project:
- _id: 250ED89C-B435-11E9-9278-68D0E5697425
  call_identifier: FWF
  grant_number: P28842-B22
  name: Sex chromosome evolution under male- and female- heterogamety
publication: Molecular Biology and Evolution
publication_identifier:
  eissn:
  - 1537-1719
  issn:
  - 0737-4038
publication_status: published
publisher: Oxford University Press
quality_controlled: '1'
related_material:
  record:
  - id: '19386'
    relation: dissertation_contains
    status: public
scopus_import: '1'
status: public
title: Schistosome W-linked genes inform temporal dynamics of sex chromosome evolution
  and suggest candidate for sex determination
tmp:
  image: /images/cc_by.png
  legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
  name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
  short: CC BY (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 138
year: '2021'
...
