Changes in gene expression linked with adult reproductive diapause in a northern malt fly species: a candidate gene microarray study.

BMC Ecology
Maaria KankareAnneli Hoikkala

Abstract

Insect diapause is an important biological process which involves many life-history parameters important for survival and reproductive fitness at both individual and population level. Drosophila montana, a species of D. virilis group, has a profound photoperiodic reproductive diapause that enables the adult flies to survive through the harsh winter conditions of high latitudes and altitudes. We created a custom-made microarray for D. montana with 101 genes known to affect traits important in diapause, photoperiodism, reproductive behaviour, circadian clock and stress tolerance in model Drosophila species. This array gave us a chance to filter out genes showing expression changes during photoperiodic reproductive diapause in a species adapted to live in northern latitudes with high seasonal changes in environmental conditions. Comparisons among diapausing, reproducing and young D. montana females revealed expression changes in 24 genes on microarray; for example in comparison between diapausing and reproducing females one gene (Drosophila cold acclimation gene, Dca) showed up-regulation and 15 genes showed down-regulation in diapausing females. Down-regulation of seven of these genes was specific to diapause state while in five ...Continue Reading

Associated Datasets

May 6, 2010·Anneli HoikkalaTiina Salminen

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Datasets Mentioned

BETA
GSE18475
GPL9293

Methods Mentioned

BETA
PCR
electrophoresis
Feature Extraction
chip
gene array

Software Mentioned

Bioconductor
Agilent
R
Array
SPSS
Feature Extraction
Limma
CFX Manager
Blat search
Primer3

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