ArticleProceedings. Biological sciences2022
Heterosis counteracts hybrid breakdown to forestall speciation by parallel natural selection.
Article in Proceedings. Biological sciences, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed, 14 citations in OpenAlex.
- Restoration of ancestral transcriptional plasticity contributes to plastic heterosis in fatty liver of hybrid ducks.Communications biology · 2026Article
- Associations Between Gut Microbiota Diversity and a Host Fitness Proxy in a Naturalistic Experiment Using Threespine Stickleback Fish.Molecular ecology · 2024Article
- The Ecology of Hybrid Incompatibilities.Cold Spring Harbor perspectives in biology · 2024Review
- Host ecotype and rearing environment are the main drivers of threespine stickleback gut microbiota diversity in a naturalistic experiment.Royal Society open science · 2024Article
- On the Origins of Phenotypic Parallelism in Benthic and Limnetic Stickleback.Molecular biology and evolution · 2023Article
- The diverse effects of phenotypic dominance on hybrid fitness.Evolution; international journal of organic evolution · 2022Article
- Heterosis counteracts hybrid breakdown to forestall speciation by parallel natural selection.Proceedings. Biological sciences · 2022Article
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2 authors at 1 institution in 1 country.
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Abstract
In contrast to ecological speciation, where reproductive isolation evolves as a consequence of divergent natural selection, speciation by parallel natural selection has been less thoroughly studied. To test whether parallel evolution drives speciation, we leveraged the repeated evolution of benthic and limnetic ecotypes of threespine stickleback fish and estimated fitness for pure crosses and within-ecotype hybrids in semi-natural ponds and in laboratory aquaria. In ponds, we detected hybrid breakdown in both ecotypes but this was counterbalanced by heterosis and the strength of post-zygotic isolation was nil. In aquaria, we detected heterosis in limnetic crosses and breakdown in benthic crosses, which is suggestive of process- and ecotype-specific environment-dependence. In ponds, heterosis and breakdown were three times greater in limnetic crosses than in benthic crosses, contrasting the prediction that the fitness consequences of hybridization should be greater in crosses among more derived ecotypes. Consistent with a primary role for stochastic processes, patterns differed among crosses between populations from different lakes. Yet, the observation of qualitatively similar patterns of heterosis and hybrid breakdown for both ecotypes when averaging the lake pairs indicates that the outcome of hybridization is repeatable in a general sense.
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