Cited by 182Chromosomal and Genetic VariationsEvolution and Genetic DynamicsPlant Taxonomy and Phylogenetics

Genetic adaptation associated with genome-doubling in autotetraploid Arabidopsis arenosa

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Hollister, Jesse D., Arnold, Brian J., Svedin, Elisabeth, Xue, Katherine S., Dilkes, Brian P., Bomblies, Kirsten·2012·PLoS Genetics

Abstract

Genome duplication, which results in polyploidy, is disruptive to fundamental biological processes. Genome duplications occur spontaneously in a range of taxa and problems such as sterility, aneuploidy, and gene expression aberrations are common in newly formed polyploids. In mammals, genome duplication is associated with cancer and spontaneous abortion of embryos. Nevertheless, stable polyploid species occur in both plants and animals. Understanding how natural selection enabled these species to overcome early challenges can provide important insights into the mechanisms by which core cellular functions can adapt to perturbations of the genomic environment. Arabidopsis arenosa includes stable tetraploid populations and is related to well-characterized diploids A. lyrata and A. thaliana. It thus provides a rare opportunity to leverage genomic tools to investigate the genetic basis of polyploid stabilization. We sequenced the genomes of twelve A. arenosa individuals and found signatures suggestive of recent and ongoing selective sweeps throughout the genome. Many of these are at genes implicated in genome maintenance functions, including chromosome cohesion and segregation, DNA repair, homologous recombination, transcriptional regulation, and chromatin structure. Numerous encoded proteins are predicted to interact with one another. For a critical meiosis gene, ASYNAPSIS1, we identified a non-synonymous mutation that is highly differentiated by cytotype, but present as a rare variant in diploid A. arenosa, indicating selection may have acted on standing variation already present in the diploid. Several genes we identified that are implicated in sister chromatid cohesion and segregation are homologous to genes identified in a yeast mutant screen as necessary for survival of polyploid cells, and also implicated in genome instability in human diseases including cancer. This points to commonalities across kingdoms and supports the hypothesis that selection has acted on genes controlling genome integrity in A. arenosa as an adaptive response to genome doubling.

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Crossref · 10.1371/journal.pgen.1003093

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  • Adaptation to WGD in autotetraploid Arabidopsis was shown to involve standing genetic variation.

    “A notable example is adaptation to WGD in autotetraploid Arabidopsis, which was shown to involve standing genetic variation (Hollister et al., 2012; see also Polyploid speciation).”

    From Genomics of plant speciation (2023) · cites this paper as Hollister et al., 2012

    The Results (Meiosis; page unavailable) identify an ASY1 variant common in tetraploid A. arenosa but rare in diploids. The Discussion says this suggests standing variation may have contributed to tetraploid stabilization. It does not establish definitively that adaptation to whole-genome duplication involved standing variation. (LLM, conf=0.88)

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Authors
Hollister, J. D., Arnold, B. J., Svedin, E., Xue, K. S., Dilkes, B. P., & Bomblies, K.
Affiliations
  • Harvard University (US)
  • Purdue University West Lafayette (US)
Corresponding author
Bomblies, Kirsten
Venue
PLoS Genetics
Published
2012-12-20
Volume
8
Issue
12
Pages
e1003093
ISSN
  • 1553-7390 (ISSN-L)
  • 1553-7404
OpenAlex
W2136484851
Cited by
182
References
83
Citations by year
2026: 9 · 2025: 9 · 2024: 12 · 2023: 11 · 2022: 19 · 2021: 19 · 2020: 15 · 2019: 14 · 2018: 11 · 2017: 9 · 2016: 14 · 2015: 14 · 2014: 18 · 2013: 7 · 2012: 1
FWCI
14.62
Type
journal article
Language
en
Open access
Locations
  • PLoS Genetics (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Digital Access to Scholarship at Harvard (DASH) (Harvard University) (submittedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Figshare (submittedVersion, cc-by)
  • Repository for Publications and Research Data (ETH Zurich) (submittedVersion, cc-by)
  • ETH Zürich Research Collection (cc-by)
Funders
Harvard University
Topics
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Chromosomal and Genetic Variations
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Evolution and Genetic Dynamics
  • Life Sciences › Agricultural and Biological Sciences › Ecology, Evolution, Behavior and Systematics › Plant Taxonomy and Phylogenetics
Keywords
Arabidopsis arenosa, autotetraploidy, whole-genome duplication, natural selection, selective sweeps, genome stability, chromosome cohesion, sister chromatid segregation, DNA repair, homologous recombination, meiosis
MeSH terms
Adaptation, Biological, Diploidy, Meiosis, Arabidopsis, Genome, Plant, DNA Methylation, Chromosome Segregation, Genomic Instability, Tetraploidy

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