1. Rapid speciation via the evolution of pre-mating isolation in the Iberá Seedeater.
- Author
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Turbek SP, Browne M, Di Giacomo AS, Kopuchian C, Hochachka WM, Estalles C, Lijtmaer DA, Tubaro PL, Silveira LF, Lovette IJ, Safran RJ, Taylor SA, and Campagna L
- Subjects
- Animals, Argentina, Biological Evolution, Female, Genetic Variation, Genome, Haplotypes, Male, Mutation, Pigmentation genetics, Sympatry, Vocalization, Animal, Genetic Speciation, Mating Preference, Animal, Passeriformes genetics, Passeriformes physiology, Reproductive Isolation
- Abstract
Behavioral isolation can catalyze speciation and permit the slow accumulation of additional reproductive barriers between co-occurring organisms. We illustrate how this process occurs by examining the genomic and behavioral bases of pre-mating isolation between two bird species ( Sporophila hypoxantha and the recently discovered S. iberaensis ) that belong to the southern capuchino seedeaters, a recent, rapid radiation characterized by variation in male plumage coloration and song. Although these two species co-occur without obvious ecological barriers to reproduction, we document behaviors indicating species recognition by song and plumage traits and strong assortative mating associated with genomic regions underlying male plumage patterning. Plumage differentiation likely originated through the reassembly of standing genetic variation, indicating how novel sexual signals may quickly arise and maintain species boundaries., (Copyright © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works.)
- Published
- 2021
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