Sexually selected traits, such as ornaments and colors, affect mating success and may also lead to reproductive isolation and species formation. A recent paper shows that genes underlying sexually selected differences between barn swallow subspecies do not pass across hybrid zones, implying that hybrids have low mating success.
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Univ Pretoria, Ctr Vet Wildlife Studies, ZA-0002 Pretoria, South Africa
Univ Wyoming, Dept Zool & Physiol, Laramie, WY 82071 USAUniv Pretoria, Ctr Vet Wildlife Studies, ZA-0002 Pretoria, South Africa
Mitchell, G.
van Sittert, S. J.
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Univ Pretoria, Ctr Vet Wildlife Studies, ZA-0002 Pretoria, South AfricaUniv Pretoria, Ctr Vet Wildlife Studies, ZA-0002 Pretoria, South Africa
van Sittert, S. J.
Skinner, J. D.
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Univ Pretoria, Ctr Vet Wildlife Studies, ZA-0002 Pretoria, South AfricaUniv Pretoria, Ctr Vet Wildlife Studies, ZA-0002 Pretoria, South Africa