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Response To Natural And Laboratory Selection At The Drosophila Hsp70 Genes

Bettencourt, Brian R. ; Kim, InYoung ; Hoffmann, Ary A. ; Feder, Martin E.

Evolution, 2002-09, Vol.56 (9), p.1796-1801 [Periódico revisado por pares]

Oxford, UK: Blackwell Publishing Ltd

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Título:
Response To Natural And Laboratory Selection At The Drosophila Hsp70 Genes
Autor: Bettencourt, Brian R. ; Kim, InYoung ; Hoffmann, Ary A. ; Feder, Martin E.
Assuntos: Adaptation, Physiological - genetics ; Alleles ; Animals ; Australia ; Cline ; DNA ; Drosophila ; Drosophila - genetics ; Drosophila Proteins - genetics ; Evolution ; Gene frequency ; Genes ; Genes, Insect - genetics ; heat shock protein ; Heat shock proteins ; Heat tolerance ; Heat-Shock Response - genetics ; hsp70 ; HSP70 Heat-Shock Proteins - genetics ; Insects ; Male ; Natural selection ; Polymerase chain reaction ; Polymorphism, Genetic ; Proteins ; selection ; Selection, Genetic ; Single nucleotide polymorphism ; Temperature ; transposable element
É parte de: Evolution, 2002-09, Vol.56 (9), p.1796-1801
Notas: ark:/67375/WNG-LL3P8Q1F-L
istex:B95A64AA86ED370257E1E00589E3DC8D4811A9E6
ArticleID:EVO1796
brian@morgan.harvard.edu
.
Present address: Department of Molecular and Cellular Biology, Harvard University, 16 Divinity Avenue, Cambridge, Massachusetts 02138; E‐mail
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Descrição: To determine whether and how laboratory and natural selection act on the hsp70 (70-Kd heat-shock protein) genes of Drosophila melanogaster, we examined hsp70 allele frequencies in two sets of populations. First, five populations reared at different temperatures for more than 20 years differentially fixed both a large insertion/deletion (indel) polymorphism at the 87A7 hsp70 cluster ("56H8"/"122") and a single nucleotide polymorphism at the 87C1 hsp70 cluster. In both cases, the 18°C and 25°C populations fixed one allele and the 28°C populations the other, consistent with previously described evolved differences among these populations in Hsp70 expression and thermo-tolerance. Second, we examined 56H8 and 122 frequencies in a set of 11 populations founded from flies collected along a latitudinal transect of eastern Australia. The 56H8 allele frequencies are positively associated with latitude, consistent with maintenance of the 56H8/122 polymorphism by natural selection. Thermal extremes and average values are negatively correlated with latitude. These results suggest that natural selection imposed by temperature and thermal variability may affect hsp70 allele frequencies.
Editor: Oxford, UK: Blackwell Publishing Ltd
Idioma: Inglês

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Response To Natural And Laboratory Selection At The Drosophila Hsp70 Genes

Bettencourt, Brian R. ; Kim, InYoung ; Hoffmann, Ary A. ; Feder, Martin E.

Oxford, UK: Blackwell Publishing Ltd

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