Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Paternally expressed imprinted genes associate with hybridization barriers in Capsella
Stockholm University, Faculty of Science, Department of Ecology, Environment and Plant Sciences. Stockholm University, Science for Life Laboratory (SciLifeLab).
Show others and affiliations
Number of Authors: 72018 (English)In: Nature plants, ISSN 2055-026X, Vol. 4, no 6, p. 352-357Article in journal (Refereed) Published
Abstract [en]

Hybrid seed lethality is a widespread type of reproductive barrier among angiosperm taxa(1,2) that contributes to species divergence by preventing gene flow between natural populations(3,4). Besides its ecological importance, it is an important obstacle to plant breeding strategies(5). Hybrid seed lethality is mostly due to a failure of the nourishing endosperm tissue, resulting in embryo arrest(3,6,7). The cause of this failure is a parental dosage imbalance in the endosperm that can be a consequence of either differences in parental ploidy levels or differences in the 'effective ploidy', also known as the endosperm balance number (EBN)(8,9). Hybrid seed defects exhibit a parent-of-origin pattern(3,6,7), suggesting that differences in number or expression strength of parent-of-origin-specific imprinted genes underpin, as the primary or the secondary cause, the molecular basis of the EBN7,10. Here, we have tested this concept in the genus Capsella and show that the effective ploidy of three Capsella species correlates with the number and expression level of paternally expressed genes (PEGs). Importantly, the number of PEGs and the effective ploidy decrease with the selfing history of a species: the obligate outbreeder Capsella grandiflora had the highest effective ploidy, followed by the recent selfer Capsella rubella and the ancient selfer Capsella orientalis. PEGs were associated with the presence of transposable elements and their silencing mark, DNA methylation in CHH context (where H denotes any base except C). This suggests that transposable elements have driven the imprintome divergence between Capsella species. Together, we propose that variation in transposable element insertions, the resulting differences in PEG number and divergence in their expression level form one component of the effective ploidy variation between species of different breeding system histories, and, as a consequence, allow the establishment of endosperm-based hybridization barriers.

Place, publisher, year, edition, pages
2018. Vol. 4, no 6, p. 352-357
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:su:diva-158307DOI: 10.1038/s41477-018-0161-6ISI: 000435571000015PubMedID: 29808019OAI: oai:DiVA.org:su-158307DiVA, id: diva2:1235905
Available from: 2018-07-30 Created: 2018-07-30 Last updated: 2018-07-30Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full textPubMed

Search in DiVA

By author/editor
Steige, Kim A.Cornille, AmandineLascoux, MartinSlotte, TanjaKöhler, Claudia
By organisation
Department of Ecology, Environment and Plant SciencesScience for Life Laboratory (SciLifeLab)
Biological Sciences

Search outside of DiVA

GoogleGoogle Scholar

doi
pubmed
urn-nbn

Altmetric score

doi
pubmed
urn-nbn
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf