Cited by 60Chromosomal and Genetic VariationsPlant Reproductive BiologyPlant Taxonomy and Phylogenetics

Chromosomal rearrangements directly cause underdominant F 1 pollen sterility in Mimulus lewisii–Mimulus cardinalis hybrids

Stathos, Angela, Fishman, Lila·2014·Evolution

Abstract

Chromosomal rearrangements can contribute to the evolution of postzygotic reproductive isolation directly, by disrupting meiosis in F1 hybrids, or indirectly, by suppressing recombination among genic incompatibilities. Because direct effects of rearrangements on fertility imply fitness costs during their spread, understanding the mechanism of F1 hybrid sterility is integral to reconstructing the role(s) of rearrangements in speciation. In hybrids between monkeyflowers Mimulus cardinalis and Mimulus lewisii, rearrangements contain all quantitative trait loci (QTLs) for both premating barriers and pollen sterility, suggesting that they may have facilitated speciation in this model system. We used artificial chromosome doubling and comparative mapping to test whether heterozygous rearrangements directly cause underdominant male sterility in M. lewisii-M. cardinalis hybrids. Consistent with a direct chromosomal basis for hybrid sterility, synthetic tetraploid F1 s showed highly restored fertility (83.4% pollen fertility) relative to diploids F1 s (36.0%). Additional mapping with Mimulus parishii-M. cardinalis and M. parishii-M. lewisii hybrids demonstrated that underdominant male sterility is caused by one M. lewisii specific and one M. cardinalis specific reciprocal translocation, but that inversions had no direct effects on fertility. We discuss the importance of translocations as causes of reproductive isolation, and consider models for how underdominant rearrangements spread and fix despite intrinsic fitness costs.

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Crossref · 10.1111/evo.12503

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  • Large translocations directly cause hybrid sterility because of mis-segregation during meiosis.

    “Large translocations directly cause hybrid sterility because of mis-segregation during meiosis (King, 1995; Stathos and Fishman, 2014).”

    From Genomics of plant speciation (2023) · cites this paper as Stathos and Fishman, 2014

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Authors
Stathos, A., & Fishman, L.
Affiliations
University of Montana (US)
Venue
Evolution
Published
2014-09-17
Volume
68
Issue
11
Pages
3109-3119
ISSN
  • 0014-3820 (ISSN-L)
  • 1558-5646
OpenAlex
W1693177090
Cited by
60
References
77
Citations by year
2026: 5 · 2025: 8 · 2024: 5 · 2023: 9 · 2022: 5 · 2021: 6 · 2020: 3 · 2019: 2 · 2018: 3 · 2016: 9 · 2015: 4 · 2014: 1
FWCI
5.45
Type
journal article
Language
en
Open access
closed
Locations
  • Evolution (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Science Foundation (DEB-0846089, DEB-0918902)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Chromosomal and Genetic Variations
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Plant Reproductive Biology
  • Life Sciences › Agricultural and Biological Sciences › Ecology, Evolution, Behavior and Systematics › Plant Taxonomy and Phylogenetics
Keywords
chromosomal rearrangements, pollen sterility, Mimulus lewisii, Mimulus cardinalis, reciprocal translocation, chromosomal inversions, postzygotic isolation, speciation, quantitative trait loci, comparative mapping
MeSH terms
Hybridization, Genetic, Pollen, Translocation, Genetic, Mimulus, Chromosomes, Plant, Quantitative Trait Loci, Plant Infertility

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