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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 562088
Title Genetic and phenotypic responses to genomic selection for timing of breeding in a wild songbird
Author(s) Verhagen, Irene; Gienapp, Phillip; Laine, Veronika N.; Grevenhof, Elizabeth M. van; Mateman, Andrea C.; Oers, Kees van; Visser, Marcel E.
Source Functional Ecology 33 (2019)9. - ISSN 0269-8463 - p. 1708 - 1721.
Publication type Refereed Article in a scientific journal
Publication year 2019
Keyword(s) breeding value - genetic response - genomic selection - great tit - phenotypic response - seasonal timing of breeding - selection lines

The physiological mechanisms underlying avian seasonal timing of reproduction, a life-history trait with major fitness consequences, are not well understood. Comparing individuals that have been selected to differ in their timing of breeding may prove to be a promising in studying these mechanisms, making selection lines a valuable tool. We created selection lines for early and late timing of breeding in great tits (Parus major) using genomic selection, that is selection based on multi-marker genotypes rather than on the phenotype. We took in nestlings (F1generation) from wild broods of which the mother was either an extremely early (“early line”) or extremely late (“late line”) breeder. These chicks were then genotyped and, based on their “genomic breeding values” (GEBVs), we selected individuals for early and late line breeding pairs to produce the F2generation in captivity. The F2offspring was hand-reared, genotyped and selected to produce an F3generation, which were then again genotyped and selected. This way we obtained laying dates in aviaries for F1, F2 and F3birds. We studied the genetic response to the artificial selection and found increased genetic differentiation between the early and late reproducing selection lines over generations (F1–F3), indicated by both diverging GEBVs and increased fixation indices (FST). We studied the phenotypic response to selection for birds breeding in outdoor breeding aviaries. We found that early line birds laid earlier than late line birds, and this difference increased over the generations (F1–F3), with non-significant line effects for the F1 and F2, but highly significant line differences for the F3. We also assessed whether there was correlated selection on two traits that are potentially part of the mechanisms underlying seasonal timing: the endogenous free-running period of the day/night clock (tau) and basal metabolic rate, but found no correlated selection. We have successfully created selection lines on seasonal timing in a wild bird species and obtained an instrument for future studies to investigate the physiological mechanisms underlying timing of breeding, and the genetic variation in these mechanisms, an essential component for evolutionary change in timing of reproduction. A free Plain Language Summary can be found within the Supporting Information of this article.

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