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Type: Artigo de periódico
Title: The Adaptation Process Of Ceratitis Capitata To The Laboratory Analysis Of Life-history Traits
Author: de Souza H.M.L.
Matioli S.R.
de Souza W.N.
Abstract: Colonizing species are believed to have genetic plasticity that permits their adaptation to new habitats. The Mediterranean fruit fly, Ceratitis capitata, is known for this ability, reflected in its present world-wide geographical distribution. To investigate the genetic components of the colonizing capacity of this species, we studied the life-table parameters in (a) a recently-collected wild population, (b) a laboratory strain maintained for 6 years, and (c) a hybrid population resulting from crosses between the wild females and long-term laboratory maintained males. All the strain were collected in the same host and place. Within a few generations, both the hybrid and the wild strains showed life table parameters (egg, larval, pupal and adult mortalities, net reproductive rate, intrinsic rate of population growth, and generation time) similar to those of the laboratory strain. A difference in the speed of adaptation to the laboratory conditions was remarkable, with the hybrid population reaching the values of the long-term laboratory strain much faster than the wild population. An incipient reproductive isolation between the laboratory and the wild population was also observed. The genetic plasticity that allows fast adaptation to new conditions such as those in the laboratory is high in C. capitata, although the genetical variability measured by enzyme electrophoresis in Brazilian populations is low. This suggests that the isozyme variation observed is not related to this kind of adaptation. © 1988 Kluwer Academic Publishers.
Editor: Kluwer Academic Publishers
Rights: fechado
Identifier DOI: 10.1007/BF00187494
Date Issue: 1988
Appears in Collections:Unicamp - Artigos e Outros Documentos

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