September 18, 2025Molecular EcologyOpen Access

Reproductive Isolation due to Divergent Ecological Selection Is Accompanied by Vast Genomic Instability in Experimentally Evolved Yeast Populations

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Experimentally evolved yeast showed reduced reproductive compatibility with ecological divergence, suggesting genomic instability plays a key role.

Divergent ecological selection resulted in significant reproductive isolation and genomic instability in yeast hybrids.
Gamete viability declined in hybrids from divergent populations, indicating robust postzygotic reproductive isolation.
Whole genome sequencing revealed extensive structural variations and mutational load in F2 hybrids, indicating significant genomic instability.
These findings align with ecological speciation theory, supporting the role of environmental adaptation in reproductive isolation.

Bendixsen et al. (2025) studied this question.

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Experimentally evolved yeast showed reduced reproductive compatibility with ecological divergence, suggesting genomic instability plays a key role.