Directional selection effects on patterns of phenotypic (co)variation in wild populations

Autor(es)

Assis, A. P. A. ; Patton, J. L. ; Hubbe, A. ; Marroig, G.

• Tipo de documento: Artigo Científico
• Fonte: PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES; v. 283, n. 1843 NOV 30 2016.
• Citações Web of Science: 5

Resumo

Phenotypic (co)variation is a prerequisite for evolutionary change, and understanding how (co)variation evolves is of crucial importance to the biological sciences. Theoretical models predict that under directional selection, phenotypic (co)variation should evolve in step with the underlying adaptive landscape, increasing the degree of correlation among co-selected traits as well as the amount of genetic variance in the direction of selection. Whether either of these outcomes occurs in natural populations is an open question and thus an important gap in evolutionary theory. Here, we documented changes in the phenotypic (co)variation structure in two separate natural populations in each of two chipmunk species (Tamias alpinus and T. speciosus) undergoing directional selection. In populations where selection was strongest (those of T. alpinus), we observed changes, at least for one population, in phenotypic (co)variation that matched theoretical expectations, namely an increase of both phenotypic integration and (co)variance in the direction of selection and a re-alignment of the major axis of variation with the selection gradient. (AU)

• Processo FAPESP: 12/00852-4 - Estudo de mudanças morfológicas e processos evolutivos na comunidade de mamíferos do projeto Grinnell
• Beneficiário: Ana Paula Aprígio Assis
• Linha de fomento: Bolsas no Exterior - Estágio de Pesquisa - Doutorado
• Processo FAPESP: 11/14295-7 - Modularidade e suas consequências evolutivas
• Beneficiário: Gabriel Henrique Marroig Zambonato
• Linha de fomento: Auxílio à Pesquisa - Temático
• Processo FAPESP: 10/52369-0 - Evolução morfológica em séries temporais: um estudo de caso com as comunidades de mamíferos do projeto grinnell
• Beneficiário: Ana Paula Aprígio Assis
• Linha de fomento: Bolsas no Brasil - Doutorado
• Processo FAPESP: 12/24937-9 - Evolução craniana dos Xenarthra (Mammalia): modularidade e suas consequências evolutivas na diversificação morfológica
• Beneficiário: Alex Christian Rohrig Hubbe
• Linha de fomento: Bolsas no Brasil - Pós-Doutorado