Journal article

A rapid shift in a classic clinal pattern in Drosophila reflecting climate change

PA Umina, AR Weeks, MR Kearney, SW McKechnie, AA Hoffmann

SCIENCE | AMER ASSOC ADVANCEMENT SCIENCE | Published : 2005

Abstract

Geographical clines in genetic polymorphisms are widely used as evidence of climatic selection and are expected to shift with climate change. We show that the classic latitudinal cline in the alcohol dehydrogenase polymorphism of Drosophila melanogaster has shifted over 20 years in eastern coastal Australia. Southern high-latitude populations now have the genetic constitution of more northerly populations, equivalent to a shift of 4 degrees in latitude. A similar shift was detected for a genetically independent inversion polymorphism, whereas two other linked polymorphisms exhibiting weaker clinal patterns have remained relatively stable. These genetic changes are likely to reflect increasin..

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