Phylogenetic relationships in the Neotropical bruchid genus Acanthoscelides (Bruchinae, Bruchidae, Coleoptera)

Détails

ID Serval
serval:BIB_C7E29E1CE946
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Phylogenetic relationships in the Neotropical bruchid genus Acanthoscelides (Bruchinae, Bruchidae, Coleoptera)
Périodique
Journal of the Zoological Systematics and Evolutionary Research
Auteur(s)
Alvarez N., Napoles J.R., Anton K.W., Benrey B., Hossaert-McKey M.
ISSN
0947-5745
Statut éditorial
Publié
Date de publication
2006
Peer-reviewed
Oui
Volume
44
Numéro
1
Pages
63-74
Langue
anglais
Résumé
Adaptation to host-plant defences through key innovations is a driving force of evolution in phytophagous insects. Species of the neotropical bruchid genus Acanthoscelides Schilsky are known to be associated with specific host plants. The speciation processes involved in such specialization pattern that have produced these specific associations may reflect radiations linked to particular kinds of host plants. By studying host-plant associations in closely related bruchid species, we have shown that adaptation to a particular host-plant (e.g. with a certain type of secondary compounds) could generally lead to a radiation of bruchid species at the level of terminal branches. However, in some cases of recent host shifts, there is no congruence between genetic proximity of bruchid species, and taxonomic similarity of host plants. At deeper branches in the phylogeny, vicariance or long-distance colonization events seem to be responsible for genetic divergence between well-marked clades rather than adaptation to host plants. Our study also suggests that the few species of Acanthoscelides described from the Old World, as well as Neotropical species feeding on Mimosoideae, are misclassified, and are more closely related to the sister genus Bruchidius.
Mots-clé
adaptive radiation, vicariance, long-distance colonization, host-plant adaptation
Web of science
Création de la notice
18/04/2010 12:27
Dernière modification de la notice
03/03/2018 21:20
Données d'usage