Epistasis and the Genetic Divergence of Photoperiodism between Populations of the Pitcher-Plant Mosquito, Wyeomyia Smithii
AUTOR(ES)
Hard, J. J.
RESUMO
Parallel crosses between each of two southern (ancestral) and one northern (derived) population of the pitcher-plant mosquito, Wyeomyia smithii, were made to determine the genetic components of population divergence in critical photoperiod, a phenological trait that measures adaptation to seasonality along a climatic gradient. Joint scaling tests were used to analyze means and variances of first- and second-generation hybrids in order to determine whether nonadditive genetic variance, especially epistatic variance, contributed to divergence in critical photoperiod. In both crosses, digenic epistatic effects were highly significant, indicating that genetic divergence cannot have resulted solely from differences in additively acting loci. For one cross that could be tested directly for such effects, higher order epistasis and/or linkage did not contribute to the divergence of critical photoperiod between the constituent populations.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1205013Documentos Relacionados
- Evolutionary Divergence of the Genetic Architecture Underlying Photoperiodism in the Pitcher-Plant Mosquito, Wyeomyia Smithii
- Frequencies of Mitochondrial DNA Haplotypes in Laboratory Cage Populations of the Mosquito, Aedes Albopictus
- Genetic Distortion of Sex Ratio in a Mosquito, AEDES AEGYPTI
- Genetic divergence between Melipona quadrifasciata Lepeletier (Hymenoptera, Apidae) populations
- An Integrated Genetic Map of the African Human Malaria Vector Mosquito, Anopheles Gambiae
