Canal-U

Mon compte
Avignon Université

[COLLOQUE] GENTREE Final Conference 27-31 January 2020 séance 15


Copier le code pour partager la vidéo :
<div style="position:relative;padding-bottom:56.25%;padding-top:10px;height:0;overflow:hidden;"><iframe src="https://www.canal-u.tv/video/universite_d_avignon_et_des_pays_de_vaucluse/embed.1/colloque_gentree_final_conference_27_31_january_2020_seance_15.55355?width=100%&amp;height=100%" style="position:absolute;top:0;left:0;width:100%;height: 100%;" width="550" height="306" frameborder="0" allowfullscreen scrolling="no"></iframe></div> Si vous souhaitez partager une séquence, indiquez le début de celle-ci , et copiez le code : h m s
Producteur Canal-U :
Avignon Université
Contacter le contributeur
J’aime
Imprimer
partager facebook twitter Google +

[COLLOQUE] GENTREE Final Conference 27-31 January 2020 séance 15



GENTREE Final Conference :

Claire GODINEAU - University of Montpellier · France




GENTREE Final Conference 'Genetics to the rescue - managing forests sustainably in a changing environment'

27-31 January 2020, Avignon, France


http://www.gentree-h2020.eu/


Claire GODINEAU - University of Montpellier · France : A theoretical study of the effects of assortative mating on the adaptive potential under climate change


Rapid evolutionary responses to contemporary climate change have been measured mostly for phenological traits, especially flowering times.

Flowering times of mates have to be similar for reproduction to take place, and are thus under assortative mating. Compared to random mating, assortative mating is predicted to increase the genetic variance of polygenic traits at mutation-genetic drift equilibrium, and to increase evolutionary response to directional selection.

We lack quantitative predictions about the effect of assortative mating on adaptive potential under scenarios of selection that mimic climate change.

We here built an individual-based quantitative genetics model to compare the adaptive potential of a polygenic trait under random versus assortative mating.

We analyzed equilibrium genetic variance and mean population fitness for several selection regimes defined by intermediate to strong stabilizing selection, combined with a constant moving optimum and inter-generational fluctuations of the optimum.

For a stationary environment with uncorrelated fluctuations and moderate to strong selection, assortative mating does not facilitate adaptation of populations compared to random mating. In contrast, when the optimum changes directionally with fluctuations around this trend, thus mimicking climate change, assortative mating increases genetic variance, which decreases the lag to the optimum and increases mean population fitness.

The fitness advantage of assortative mating increases with the speed of change of the optimum.

Comparison to analytical predictions shows that the adaptive advantage of assortative mating is entirely explained by the evolution of larger genetic variances.

The fitness advantage of assortative mating decreases when the genetic variance becomes less limiting for adaptation, e.g. when the number of loci or the intensity of stabilizing selection increases.

Therefore, in the context of climate change, assortative mating should allow better tracking of changing environments than should random mating and may contribute to rapid evolution of phenological traits.











 

commentaires


Ajouter un commentaire Lire les commentaires
*Les champs suivis d’un astérisque sont obligatoires.
Aucun commentaire sur cette vidéo pour le moment (les commentaires font l’objet d’une modération)
 

Dans la même collection

 [COLLOQUE] GENTREE Final Conference 27-31 January 2020 séance 1
 [COLLOQUE] GENTREE Final Conference 27-31 January 2020 séance 2
 [COLLOQUE] GENTREE Final Conference 27-31 January 2020 séance 3
 [COLLOQUE] GENTREE Final Conference 27-31 January 2020 séance 4
 [COLLOQUE] GENTREE Final Conference 27-31 January 2020 séance 5
 [COLLOQUE] GENTREE Final Conference 27-31 January 2020 séance 6
 [COLLOQUE] GENTREE Final Conference 27-31 January 2020 séance 7
 [COLLOQUE] GENTREE Final Conference 27-31 January 2020 séance 8
 [COLLOQUE] GENTREE Final Conference 27-31 January 2020 séance 9
 [COLLOQUE] GENTREE Final Conference 27-31 January 2020 séance 10
 [COLLOQUE] GENTREE Final Conference 27-31 January 2020 séance 11
 [COLLOQUE] GENTREE Final Conference 27-31 January 2020 séance 12
 [COLLOQUE] GENTREE Final Conference 27-31 January 2020 séance 13
 [COLLOQUE] GENTREE Final Conference 27-31 January 2020 séance 14
 [COLLOQUE] GENTREE Final Conference 27-31 January 2020 séance 16
 [COLLOQUE] GENTREE Final Conference 27-31 January 2020 séance 17
 [COLLOQUE] GENTREE Final Conference 27-31 January 2020 séance 18
 [COLLOQUE] GENTREE Final Conference 27-31 January 2020 séance 19
 [COLLOQUE] GENTREE Final Conference 27-31 January 2020 séance 20
 [COLLOQUE] GENTREE Final Conference 27-31 January 2020 séance 21
 [COLLOQUE] GENTREE Final Conference 27-31 January 2020 séance 22
 [COLLOQUE] GENTREE Final Conference 27-31 January 2020 séance 23
 [COLLOQUE] GENTREE Final Conference 27-31 January 2020 séance 24
 [COLLOQUE] GENTREE Final Conference 27-31 January 2020 séance 25
 [COLLOQUE] GENTREE Final Conference 27-31 January 2020 séance 26
 [COLLOQUE] GENTREE Final Conference 27-31 January 2020 séance 27
 [COLLOQUE] GENTREE Final Conference 27-31 January 2020 séance 28
 [COLLOQUE] GENTREE Final Conference 27-31 January 2020 séance 29
 [COLLOQUE] GENTREE Final Conference 27-31 January 2020 séance 30
 [COLLOQUE] GENTREE Final Conference 27-31 January 2020 séance 31
FMSH
 
Facebook Twitter Google+
Mon Compte