Heritability and additive genetic components of a putative post-mating sexual signal
| Autor: | D' Arpa, Stefania, Gil, Diego, Pérez-Rodríguez, Lorenzo, Muriel, Jaime, Monclús, Raquel, Martínez-Padilla, Jesús |
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| Rok vydání: | 2022 |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| Popis: | El congreso tuvo lugar del 2 al 4 de febrero de 2022 en Vigo. Indirect models of sexual selection are sustained on genetic benefits that choosy females may obtain. However, mate choice is not as symmetrical as initially thought and may explain the evolution of female sexual traits. Exploring the evolutionary architecture of female sexual traits is crucial to understand its potential evolvability, particularly in post-mating sexual signals since they can be misassigned as a by-product of female mate choice. Egg colouration has been proposed to be one of these post-mating sexual signal, honestly advertising female quality in birds, especially in blue-green laying species. In this study we used the animal model in a Bayesian framework to calculate the evolvability of multiple descriptors of blue-green egg colouration (blue-green chroma, chroma and brightness) and egg size in a wild long-term monitored population of spotless starling. Our results show high h2, 0.5 and 0.34, for the three egg colour descriptors and egg size, respectively. Since heritability is not equivalent to evolvability, we quantified the evolvability (CVA) of all components and found a low CVA suggestive of a small evolutionary potential of this phenotype, contrasting to previous results found in another blue-green egg laying species. Our results indicate a modest raw genetic material of this trait on which sexual selection can act upon and therefore a low evolvability. We speculate about the role of environmental variation on our results and the plausibility of direct models of sexual selection to explain the evolution of this trait as a post-mating sexual signal. |
| Databáze: | OpenAIRE |
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