Random Mating in a Hybrid Zone Between Two Putative Climate‐Adapted Bird Lineages With Predicted Mitonuclear Incompatibilities DOI
Lana Austin, J. Nevil Amos, Diana A. Robledo‐Ruiz

et al.

Molecular Ecology, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 24, 2024

ABSTRACT Biochemical and evolutionary interactions between mitochondrial nuclear genomes (‘mitonuclear interactions’) are proposed to underpin fundamental aspects of biology including evolution sexual reproduction, adaptation speciation. We investigated the role pre‐mating isolation in maintaining functional mitonuclear wild populations bearing diverged, putatively co‐adapted genotypes. Two lineages eastern yellow robin Eopsaltria australis —putatively climate‐adapted ‘inland’ ‘coastal’ climates—differ by ~7% mitogenome nucleotides, whereas genome differences concentrated into a sex‐linked region enriched with functions. Female‐specific selection male‐mediated gene flow across hybrid zone where coexist interbreed can explain this pattern. It remains unknown whether lineage divergence is driven intrinsic incompatibilities (particularly females; Haldane's rule), extrinsic selection, both, or other drivers. tested could be facilitated non‐random mate‐pairing respect partners' mitolineage and/or genes encoded Z sex‐chromosome, which differ lineages. used field‐, Z‐linked‐ data from two locations hybridise test females mate disproportionately (1) males their own similar Z‐linked variation, as might expected if hybrids experience incompatibilities, (2) locally‐adapted males, under environmental selection. Comparing field observations simulations provided no evidence mating, thus drivers observed population genetic patterns consistent reduced female likely acting post‐mating. Future tests female‐biased mortality at different life stages habitat may clarify mechanisms

Language: Английский

Random Mating in a Hybrid Zone Between Two Putative Climate‐Adapted Bird Lineages With Predicted Mitonuclear Incompatibilities DOI
Lana Austin, J. Nevil Amos, Diana A. Robledo‐Ruiz

et al.

Molecular Ecology, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 24, 2024

ABSTRACT Biochemical and evolutionary interactions between mitochondrial nuclear genomes (‘mitonuclear interactions’) are proposed to underpin fundamental aspects of biology including evolution sexual reproduction, adaptation speciation. We investigated the role pre‐mating isolation in maintaining functional mitonuclear wild populations bearing diverged, putatively co‐adapted genotypes. Two lineages eastern yellow robin Eopsaltria australis —putatively climate‐adapted ‘inland’ ‘coastal’ climates—differ by ~7% mitogenome nucleotides, whereas genome differences concentrated into a sex‐linked region enriched with functions. Female‐specific selection male‐mediated gene flow across hybrid zone where coexist interbreed can explain this pattern. It remains unknown whether lineage divergence is driven intrinsic incompatibilities (particularly females; Haldane's rule), extrinsic selection, both, or other drivers. tested could be facilitated non‐random mate‐pairing respect partners' mitolineage and/or genes encoded Z sex‐chromosome, which differ lineages. used field‐, Z‐linked‐ data from two locations hybridise test females mate disproportionately (1) males their own similar Z‐linked variation, as might expected if hybrids experience incompatibilities, (2) locally‐adapted males, under environmental selection. Comparing field observations simulations provided no evidence mating, thus drivers observed population genetic patterns consistent reduced female likely acting post‐mating. Future tests female‐biased mortality at different life stages habitat may clarify mechanisms

Language: Английский

Citations

0