Cited by 366Chromosomal and Genetic VariationsEvolution and Genetic DynamicsEvolution and Paleontology Studies

The likelihood of homoploid hybrid speciation

Buerkle, C Alex, Morris, Robert J, Asmussen, Marjorie A, Rieseberg, Loren H·2000·Heredity

Abstract

New species may be formed through hybridization and without an increase in ploidy. The challenge is for hybrid derivatives to escape the homogenizing effects of gene flow from parental species. The mechanisms hypothesized to underlie this process were modelled using a computer simulation. The model is of recombinational speciation, in which chromosomal rearrangements between parental species result in poor fertility of F1 hybrids, but through recombination, novel homozygous types are formed that have restored fertility. In simulations, stable populations bearing the recombinant karyotypes originated frequently and were maintained when the fertility of F1 hybrids was high. However, this high rate of origination was offset by low genetic isolation, and lower F1 hybrid fertility increased the evolutionary independence of derived populations. In addition, simulations showed that ecological and spatial isolation were required to achieve substantial reproductive isolation of incipient species. In the model, the opportunity for ecological isolation arose as a result of adaptation to extreme habitats not occupied by parental species, and any form of spatial isolation (e.g. founder events) contributed to genetic isolation. Our results confirmed the importance of the combination of factors that had been emphasized in verbal models and illustrate the trade-off between the frequency at which hybrid species arise and the genetic integrity of incipient species.

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Crossref · 10.1046/j.1365-2540.2000.00680.x

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  • Homoploid hybrid speciation is thought to be rare because of the challenge of evolving RI from parental populations.

    “In contrast to polyploid hybrid speciation, which is the focus of the next section of this review, homoploid hybrid speciation is thought to be rare because of the challenge of evolving RI from parental populations (Rieseberg, 1997; Buerkle et al., 2000; Schumer et al., 2014; but see Nieto Feliner et al., 2017).”

    From Genomics of plant speciation (2023) · cites this paper as Buerkle et al., 2000

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Authors
Buerkle, C. A., Morris, R. J., Asmussen, M. A., & Rieseberg, L. H.
Affiliations
  • Indiana University Bloomington (US)
  • University of Georgia (US)
Venue
Heredity
Published
2000-04
Volume
84
Issue
4
Pages
441-451
ISSN
  • 0018-067X (ISSN-L)
  • 1365-2540
OpenAlex
W2107564934
Cited by
366
References
42
Citations by year
2026: 8 · 2025: 12 · 2024: 11 · 2023: 14 · 2022: 9 · 2021: 10 · 2020: 15 · 2019: 19 · 2018: 13 · 2017: 13 · 2016: 11 · 2015: 17 · 2014: 21 · 2013: 18 · 2012: 23
FWCI
15.67
Type
journal article
Language
en
Open access
closed
Locations
  • Heredity (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Science Foundation
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
  • Physical Sciences › Earth and Planetary Sciences › Paleontology › Evolution and Paleontology Studies
Keywords
homoploid hybrid speciation, hybridization, chromosomal rearrangements, F1 hybrid fertility, recombination, reproductive isolation, gene flow, karyotype evolution, habitat isolation, spatial isolation, founder events
MeSH terms
Animals, Ecology, Fertility, Humans, Hybridization, Genetic, Models, Genetic, Ploidies, Recombination, Genetic, Species Specificity, Likelihood Functions

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