Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.5/5204
Título: Divergência ecológica e genética numa população da processionária do pinheiro com desvio na sua fenologia
Outros títulos: Ecological and genetic divergence in a population of the pine processionary moth with shifted phenology
Autor: Santos, Helena Maria Gonçalves
Orientador: Simões, Manuela Rodrigues Branco
Kerdelhué, Carole
Palavras-chave: pine processionary moth
ecological divergence
allochrony
saltational evolution
genetics
phenology
Data de Defesa: 2012
Editora: ISA/UTL
Citação: Santos, H.M.G. - Divergência ecológica e genética numa população da processionária do pinheiro com desvio na sua fenologia. Lisboa: ISA, 2012
Resumo: A case of incipient allochronic speciation through phenological shift in the pine processionary moth is studied. Two sympatric populations are reproductively isolated by the timing of adult emergence. Larval development is partially simultaneous, although life stages occur in different seasons. Adult flight was monitored in the field for several years and locations. Genetic markers were used to obtain genetic assignment and population differentiation according to the phenology. Results evidence high genetic distance between the two populations. The genetic structure revealed to be stable in time. In general, sampled individuals could be correctly assigned to their reference populations. Ecological differentiation was assessed in the egg and larval stages. Larvae from the shifted population revealed higher tolerance to temperatures above 36ºC. Ecological divergence was observed in the egg stage, namely in load, size, coverage and parasitism . The phenology patterns of adult emergence were studied on the two sympatric populations and their artificially obtained hybrids, aiming at determining phenotypic heritability of the emergence pattern. Results indicate high heritability, and the hybrids reveal intermediate adult phenology. Microsatellite genotyping allowed the discrimination of hybrids. Results here presented clearly show the occurrence of an incipient allochronic speciation process with ecological differentiation in course
Descrição: Doutoramento em Engenharia Florestal e dos Recursos Naturais - Instituto Superior de Agronomia
URI: http://hdl.handle.net/10400.5/5204
Aparece nas colecções:BISA - Teses de Doutoramento / Doctoral Thesis

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