Unidirectional response to bidirectional selection on body size II. Quantitative genetics
Abstract Anticipating the genetic and phenotypic changes induced by natural or artificial selection requires reliable estimates of trait evolvabilities (genetic variances and covariances). However, whether or not multivariate quantitative genetics models are able to predict precisely the evolution o...
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doaj-f9c38cdd6ee44f2c855c28cbed8747f12021-04-02T19:24:15ZengWileyEcology and Evolution2045-77582020-10-011020114531146610.1002/ece3.6783Unidirectional response to bidirectional selection on body size II. Quantitative geneticsArnaud Le Rouzic0Clémentine Renneville1Alexis Millot2Simon Agostini3David Carmignac4Éric Édeline5Laboratoire Évolution, Génomes, Comportement, Écologie CNRS, IRD, Université Paris‐Saclay Gif‐sur‐Yvette FranceInstitut d'Écologie et des Sciences de l'Environnement de Paris (iEES‐Paris) Sorbonne Université, Université Paris Diderot, UPEC, CNRS, INRAE, IRD Paris FranceCentre de Recherche en Écologie Expérimentale et Prédictive (CEREEP‐Ecotron Ile‐de‐France), UMS 3194 École normale supérieure, PSL Research University, CNRS Saint‐Pierre‐lès‐Nemours FranceCentre de Recherche en Écologie Expérimentale et Prédictive (CEREEP‐Ecotron Ile‐de‐France), UMS 3194 École normale supérieure, PSL Research University, CNRS Saint‐Pierre‐lès‐Nemours FranceInstitut d'Écologie et des Sciences de l'Environnement de Paris (iEES‐Paris) Sorbonne Université, Université Paris Diderot, UPEC, CNRS, INRAE, IRD Paris FranceInstitut d'Écologie et des Sciences de l'Environnement de Paris (iEES‐Paris) Sorbonne Université, Université Paris Diderot, UPEC, CNRS, INRAE, IRD Paris FranceAbstract Anticipating the genetic and phenotypic changes induced by natural or artificial selection requires reliable estimates of trait evolvabilities (genetic variances and covariances). However, whether or not multivariate quantitative genetics models are able to predict precisely the evolution of traits of interest, especially fitness‐related, life history traits, remains an open empirical question. Here, we assessed to what extent the response to bivariate artificial selection on both body size and maturity in the medaka Oryzias latipes, a model fish species, fits the theoretical predictions. Three lines (Large, Small, and Control lines) were differentially selected for body length at 75 days of age, conditional on maturity. As maturity and body size were phenotypically correlated, this selection procedure generated a bi‐dimensional selection pattern on two life history traits. After removal of nonheritable trends and noise with a random effect (“animal”) model, the observed selection response did not match the expected bidirectional response. For body size, Large and Control lines responded along selection gradients (larger body size and stasis, respectively), but, surprisingly, the Small did not evolve a smaller body length and remained identical to the Control line throughout the experiment. The magnitude of the empirical response was smaller than the theoretical prediction in both selected directions. For maturity, the response was opposite to the expectation (the Large line evolved late maturity compared to the Control line, while the Small line evolved early maturity, while the opposite pattern was predicted due to the strong positive genetic correlation between both traits). The mismatch between predicted and observed response was substantial and could not be explained by usual sources of uncertainties (including sampling effects, genetic drift, and error in G matrix estimates).https://doi.org/10.1002/ece3.6783animal modelartificial selectionasymmetric responseBayesian mixed modelsbivariate selectionevolvability |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Arnaud Le Rouzic Clémentine Renneville Alexis Millot Simon Agostini David Carmignac Éric Édeline |
spellingShingle |
Arnaud Le Rouzic Clémentine Renneville Alexis Millot Simon Agostini David Carmignac Éric Édeline Unidirectional response to bidirectional selection on body size II. Quantitative genetics Ecology and Evolution animal model artificial selection asymmetric response Bayesian mixed models bivariate selection evolvability |
author_facet |
Arnaud Le Rouzic Clémentine Renneville Alexis Millot Simon Agostini David Carmignac Éric Édeline |
author_sort |
Arnaud Le Rouzic |
title |
Unidirectional response to bidirectional selection on body size II. Quantitative genetics |
title_short |
Unidirectional response to bidirectional selection on body size II. Quantitative genetics |
title_full |
Unidirectional response to bidirectional selection on body size II. Quantitative genetics |
title_fullStr |
Unidirectional response to bidirectional selection on body size II. Quantitative genetics |
title_full_unstemmed |
Unidirectional response to bidirectional selection on body size II. Quantitative genetics |
title_sort |
unidirectional response to bidirectional selection on body size ii. quantitative genetics |
publisher |
Wiley |
series |
Ecology and Evolution |
issn |
2045-7758 |
publishDate |
2020-10-01 |
description |
Abstract Anticipating the genetic and phenotypic changes induced by natural or artificial selection requires reliable estimates of trait evolvabilities (genetic variances and covariances). However, whether or not multivariate quantitative genetics models are able to predict precisely the evolution of traits of interest, especially fitness‐related, life history traits, remains an open empirical question. Here, we assessed to what extent the response to bivariate artificial selection on both body size and maturity in the medaka Oryzias latipes, a model fish species, fits the theoretical predictions. Three lines (Large, Small, and Control lines) were differentially selected for body length at 75 days of age, conditional on maturity. As maturity and body size were phenotypically correlated, this selection procedure generated a bi‐dimensional selection pattern on two life history traits. After removal of nonheritable trends and noise with a random effect (“animal”) model, the observed selection response did not match the expected bidirectional response. For body size, Large and Control lines responded along selection gradients (larger body size and stasis, respectively), but, surprisingly, the Small did not evolve a smaller body length and remained identical to the Control line throughout the experiment. The magnitude of the empirical response was smaller than the theoretical prediction in both selected directions. For maturity, the response was opposite to the expectation (the Large line evolved late maturity compared to the Control line, while the Small line evolved early maturity, while the opposite pattern was predicted due to the strong positive genetic correlation between both traits). The mismatch between predicted and observed response was substantial and could not be explained by usual sources of uncertainties (including sampling effects, genetic drift, and error in G matrix estimates). |
topic |
animal model artificial selection asymmetric response Bayesian mixed models bivariate selection evolvability |
url |
https://doi.org/10.1002/ece3.6783 |
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