Experimental evolution of learning ability in fruit flies.

Détails

ID Serval
serval:BIB_0360E7F9671D
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Experimental evolution of learning ability in fruit flies.
Périodique
Proceedings of the National Academy of Sciences of the United States of America
Auteur(s)
Mery F., Kawecki T.J.
ISSN
0027-8424[print], 0027-8424[linking]
Statut éditorial
Publié
Date de publication
2002
Peer-reviewed
Oui
Volume
99
Numéro
22
Pages
14274-14279
Langue
anglais
Résumé
The presence of genetic variation for learning ability in animals opens the way for experiments asking how and under what ecological circumstances improved learning ability should evolve. Here we report experimental evolution of learning ability in Drosophila melanogaster. We exposed experimental populations for 51 generations to conditions that we expected to favor associative learning with regard to oviposition substrate choice. Flies that learned to associate a chemical cue (quinine) with a particular substrate, and still avoided this substrate several hours after the cue had been removed, were expected to contribute more alleles to the next generation. From about generation 15 on, the experimental populations showed marked ability to avoid oviposition substrates that several hours earlier had contained the chemical cue. The improved response to conditioning was also expressed when the flies were faced with a choice of novel media. We demonstrate that these behavioral changes are caused by the evolution of both a higher learning rate and a better memory.
Mots-clé
Animals, Avoidance Learning, Behavior, Animal, Drosophila melanogaster/physiology, Evolution, Oviposition, Quinine
Pubmed
Web of science
Open Access
Oui
Création de la notice
19/11/2007 9:27
Dernière modification de la notice
20/08/2019 12:25
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