---
_id: '7205'
abstract:
- lang: eng
  text: Genetic incompatibilities contribute to reproductive isolation between many
    diverging populations, but it is still unclear to what extent they play a role
    if divergence happens with gene flow. In contact zones between the "Crab" and
    "Wave" ecotypes of the snail Littorina saxatilis, divergent selection forms strong
    barriers to gene flow, while the role of post‐zygotic barriers due to selection
    against hybrids remains unclear. High embryo abortion rates in this species could
    indicate the presence of such barriers. Post‐zygotic barriers might include genetic
    incompatibilities (e.g. Dobzhansky–Muller incompatibilities) but also maladaptation,
    both expected to be most pronounced in contact zones. In addition, embryo abortion
    might reflect physiological stress on females and embryos independent of any genetic
    stress. We examined all embryos of >500 females sampled outside and inside contact
    zones of three populations in Sweden. Females' clutch size ranged from 0 to 1,011
    embryos (mean 130 ± 123), and abortion rates varied between 0% and 100% (mean
    12%). We described female genotypes by using a hybrid index based on hundreds
    of SNPs differentiated between ecotypes with which we characterized female genotypes.
    We also calculated female SNP heterozygosity and inversion karyotype. Clutch size
    did not vary with female hybrid index, and abortion rates were only weakly related
    to hybrid index in two sites but not at all in a third site. No additional variation
    in abortion rate was explained by female SNP heterozygosity, but increased female
    inversion heterozygosity added slightly to increased abortion. Our results show
    only weak and probably biologically insignificant post‐zygotic barriers contributing
    to ecotype divergence, and the high and variable abortion rates were marginally,
    if at all, explained by hybrid index of females.
article_processing_charge: No
article_type: original
author:
- first_name: Kerstin
  full_name: Johannesson, Kerstin
  last_name: Johannesson
- first_name: Zuzanna
  full_name: Zagrodzka, Zuzanna
  last_name: Zagrodzka
- first_name: Rui
  full_name: Faria, Rui
  last_name: Faria
- first_name: Anja M
  full_name: Westram, Anja M
  id: 3C147470-F248-11E8-B48F-1D18A9856A87
  last_name: Westram
  orcid: 0000-0003-1050-4969
- first_name: Roger K.
  full_name: Butlin, Roger K.
  last_name: Butlin
citation:
  ama: Johannesson K, Zagrodzka Z, Faria R, Westram AM, Butlin RK. Is embryo abortion
    a post-zygotic barrier to gene flow between Littorina ecotypes? <i>Journal of
    Evolutionary Biology</i>. 2020;33(3):342-351. doi:<a href="https://doi.org/10.1111/jeb.13570">10.1111/jeb.13570</a>
  apa: Johannesson, K., Zagrodzka, Z., Faria, R., Westram, A. M., &#38; Butlin, R.
    K. (2020). Is embryo abortion a post-zygotic barrier to gene flow between Littorina
    ecotypes? <i>Journal of Evolutionary Biology</i>. Wiley. <a href="https://doi.org/10.1111/jeb.13570">https://doi.org/10.1111/jeb.13570</a>
  chicago: Johannesson, Kerstin, Zuzanna Zagrodzka, Rui Faria, Anja M Westram, and
    Roger K. Butlin. “Is Embryo Abortion a Post-Zygotic Barrier to Gene Flow between
    Littorina Ecotypes?” <i>Journal of Evolutionary Biology</i>. Wiley, 2020. <a href="https://doi.org/10.1111/jeb.13570">https://doi.org/10.1111/jeb.13570</a>.
  ieee: K. Johannesson, Z. Zagrodzka, R. Faria, A. M. Westram, and R. K. Butlin, “Is
    embryo abortion a post-zygotic barrier to gene flow between Littorina ecotypes?,”
    <i>Journal of Evolutionary Biology</i>, vol. 33, no. 3. Wiley, pp. 342–351, 2020.
  ista: Johannesson K, Zagrodzka Z, Faria R, Westram AM, Butlin RK. 2020. Is embryo
    abortion a post-zygotic barrier to gene flow between Littorina ecotypes? Journal
    of Evolutionary Biology. 33(3), 342–351.
  mla: Johannesson, Kerstin, et al. “Is Embryo Abortion a Post-Zygotic Barrier to
    Gene Flow between Littorina Ecotypes?” <i>Journal of Evolutionary Biology</i>,
    vol. 33, no. 3, Wiley, 2020, pp. 342–51, doi:<a href="https://doi.org/10.1111/jeb.13570">10.1111/jeb.13570</a>.
  short: K. Johannesson, Z. Zagrodzka, R. Faria, A.M. Westram, R.K. Butlin, Journal
    of Evolutionary Biology 33 (2020) 342–351.
date_created: 2019-12-22T23:00:43Z
date_published: 2020-03-01T00:00:00Z
date_updated: 2025-07-10T11:54:22Z
day: '01'
ddc:
- '570'
department:
- _id: NiBa
doi: 10.1111/jeb.13570
external_id:
  isi:
  - '000500954800001'
  pmid:
  - '31724256'
file:
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  checksum: 7534ff0839709c0c5265c12d29432f03
  content_type: application/pdf
  creator: dernst
  date_created: 2020-09-22T09:42:18Z
  date_updated: 2020-09-22T09:42:18Z
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  file_name: 2020_EvolBiology_Johannesson.pdf
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file_date_updated: 2020-09-22T09:42:18Z
fulldoi: https://doi.org/10.1111/jeb.13570
has_accepted_license: '1'
intvolume: '        33'
isi: 1
issue: '3'
language:
- iso: eng
license: https://creativecommons.org/licenses/by/4.0/
month: '03'
oa: 1
oa_version: Published Version
page: 342-351
pmid: 1
publication: Journal of Evolutionary Biology
publication_identifier:
  eissn:
  - 1420-9101
  issn:
  - 1010-061X
publication_status: published
publisher: Wiley
quality_controlled: '1'
related_material:
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  - id: '13067'
    relation: research_data
    status: public
scopus_import: '1'
status: public
title: Is embryo abortion a post-zygotic barrier to gene flow between Littorina ecotypes?
tmp:
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  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: 33
year: '2020'
...