• español
  • English
  • français
  • Deutsch
  • português (Brasil)
  • italiano
Consorcio BUCLE Recolector
  • Contact Us
  • Send Feedback
  • Enlaces y accesos
    • Derechos de autor
    • Políticas
    • Guía de autoarchivo
    • FAQ y ayuda
    • La ULE y el Acceso Abierto
    • español
    • English
    • français
    • Deutsch
    • português (Brasil)
    • italiano
    • español
    • English
    • français
    • Deutsch
    • português (Brasil)
    • italiano
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Repositorio
    Institucional
    Abierto

    Consorcio BUCLE Recolector

    Browse

    All of BULERIACommunities and CollectionsAuthorsDirectoresTitlesSubjectsFacultad/CentroÁrea de conocimientoFecha de creación/publicaciónTitulaciónThis CollectionAuthorsDirectoresTitlesSubjectsFacultad/CentroÁrea de conocimientoFecha de creación/publicaciónTitulación

    My Account

    Login

    Statistics

    View Usage Statistics

    Otros enlaces

    View Item 
    •   BULERIA Home
    • Scientific Production
    • Untitled
    • View Item
    •   BULERIA Home
    • Scientific Production
    • Untitled
    • View Item

    Compartir

    Export

    RISMendeleyRefworksZotero
    • edm
    • marc
    • xoai
    • qdc
    • ore
    • ese
    • dim
    • uketd_dc
    • oai_dc
    • etdms
    • rdf
    • mods
    • mets
    • didl
    • premis

    Citas

    Título
    A father effect explains sex-ratio bias
    Autor
    Malo Valenzuela, Aurelio F.
    Martínez Pastor, FelipeAutoridad BuleriaORCID
    García González, Francisco
    Garde López-Brea, Julián
    Ballou, Jonathan D.
    Lacy, Robert C
    Facultad/Centro
    Facultad de Ciencias Biologicas y Ambientales
    Área de conocimiento
    Biologia Celular
    Datos de la obra
    Proceedings of the Royal Society B: Biological Sciences, 2017, vol.184, n. 1861
    Editor
    The Royal Society
    Fecha
    2017-08-30
    Abstract
    Sex ratio allocation has important fitness consequences, and theory predicts that parents should adjust offspring sex ratio in cases where the fitness returns of producing male and female offspring vary. The ability of fathers to bias offspring sex ratios has traditionally been dismissed given the expectation of an equal proportion of X- and Y-chromosome-bearing sperm (CBS) in ejaculates due to segregation of sex chromosomes at meiosis. This expectation has been recently refuted. Here we used Peromyscus leucopus to demonstrate that sex ratio is explained by an exclusive effect of the father, and suggest a likely mechanism by which male-driven sex-ratio bias is attained. We identified a male sperm morphological marker that is associated with the mechanism leading to sex ratio bias; differences among males in the sperm nucleus area (a proxy for the sex chromosome that the sperm contains) explain 22% variation in litter sex ratio. We further show the role played by the sperm nucleus area as a mediator in the relationship between individual genetic variation and sex-ratio bias. Fathers with high levels of genetic variation had ejaculates with a higher proportion of sperm with small nuclei area. This, in turn, led to siring a higher proportion of sons (25% increase in sons per 0.1 decrease in the inbreeding coefficient). Our results reveal a plausible mechanism underlying unexplored male-driven sex-ratio biases. We also discuss why this pattern of paternal bias can be adaptive. This research puts to rest the idea that father contribution to sex ratio variation should be disregarded in vertebrates, and will stimulate research on evolutionary constraints to sex ratios—for example, whether fathers and mothers have divergent, coinciding, or neutral sex allocation interests. Finally, these results offer a potential explanation for those intriguing cases in which there are sex ratio biases, such as in humans.
    Materia
    Veterinaria
    Palabras clave
    Trivers and Willard hypothesis
    Male effects
    Inbreeding
    Sex allocation
    Sperm cell nucleus
    Sperm nucleus size
    Peer review
    SI
    URI
    http://hdl.handle.net/10612/10716
    Versión del editor
    https://royalsocietypublishing.org/doi/10.1098/rspb.2017.1159
    Collections
    • Untitled [2723]
    Show full item record
    Files in this item
    Nombre:
    88 A father effect explains sex-ratio bias ProcBiolSci_284_20171159_2017 PDF.pdf
    Tamaño:
    322.4Kb
    Formato:
    Adobe PDF
    Thumbnail
    FilesOpen