Project description:This submission contains 3 different datasets:
- series A: D. melanogaster female ? D. simulans male embryos vs internal standard of pooled D. simulans and D. melanogaster (1:1) embryos
- series B: D. simulans female ? D. melanogaster male embryos vs internal standard of pooled D. simulans and D. melanogaster (1:1) embryos
- series E: D. melanogaster female ? D. simulans male adult heads vs internal standard of pooled D. simulans and D. melanogaster (1:1) adult heads
Each dataset is in triplicates.
Quantitation was performed with isobaric isotopologues labelling.
Project description:Males hybrids from the crosses between species of the D. simulans clade are steriles as the females are fertiles. Hybrid male sterility is due to severe defects in spermatogenesis and phenotypic differences are observed between the different hybrids involving D. simulans, D. sechellia and D. mauritiana. In this study we are comparing gene expression in the testes of hybrids involving the female D. simulans and the males D. melanogaster, D. mauritiana, or D. sechellia to the gene expression in species testes. Keywords: Comparative genomic hybridization
Project description:Males hybrids from the crosses between species of the D. simulans clade are steriles as the females are fertiles. Hybrid male sterility is due to severe defects in spermatogenesis and phenotypic differences are observed between the different hybrids involving D. simulans, D. sechellia and D. mauritiana. In this study we are comparing gene expression in the testes of hybrids involving the female D. simulans and the males D. melanogaster, D. mauritiana, or D. sechellia to the gene expression in species testes. Keywords: Comparative genomic hybridization 4 species (D. melanogaster, D. simulans, D. sechellia, D. mauritiana) and 3 different hybrids were used in this study. RNA extracted from whole D. melanogaster males was used as a reference. Hybridizations were perfomed using RNA extraxted from a pool of 200 testes from a sample with RNA extracted from whole D. melanogaster males. At least three independent replicates per hybridizations were performed
Project description:Transcriptional profiling of courtship song stimulated females in Drosophila melanogaster comparing females exposed to conspecific song to those exposed to either white-noise (control) or heterospecific song (D. simulans) Three condition experiment, D. melanogaster (mel_song) song stimulated vs. Control (no_song) and vs. D. simulans (sim_song) stimulated females. Biological replicates: 7 for D_mel_song, 4 for no_song, 3 for D_sim_song. One replicate per array. Each sample contains 120 pooled female heads, collected from three independent experiments. Technical replication: two arrays with reverse labeling for each contrast.
Project description:Investigation of sex-biased expression across species have relied on measurements from whole flies which sample the extensive expression differences found in the germline and gonads of females and males. We wanted to examine genes with sex-biased expression in a somatic tissue to analyze patterns of genes with sex-biased expression in the context of a tissue more phenotypically similar between females and males. We used a Nimblegen microarray designed for Drosophila melanogaster and two custom micoarrays designed for D. pseudoobscura and D. mojavensis to survey gene expression differences in heads of females and males.
Project description:Investigation of sex-biased expression across species have relied on measurements from whole flies which sample the extensive expression differences found in the germline and gonads of females and males. We wanted to examine genes with sex-biased expression in a somatic tissue to analyze patterns of genes with sex-biased expression in the context of a tissue more phenotypically similar between females and males. We used a Nimblegen microarray designed for Drosophila melanogaster and two custom micoarrays designed for D. pseudoobscura and D. mojavensis to survey gene expression differences in heads of females and males. PolyA+ mRNA was isolated in quadruplicate from dissected heads of 8 day old adult females and males. Female and male mRNA were labeled with Cy3 or Cy5 dyes separately and co-hybridized to species-specific microarrays. We analyzed a total of 24 channels of data.
Project description:Sex chromosomes and more particularely the X chromosomes are known to have a major effect on hybrid male sterility. In this experiment by making use of the reciprocal hybrids between D. simulans and D. sechellia, we are showing the effect of these chromosomes on gene expression in male hybrids Keywords: X chromosome, hybrid Testes from for days old individuals (D. simulans, D. sechellia, hybrid D. simulans female x D. sechellia male, hybrid D. sechellia female x D. simulans male) were dissected and RNA was extracted and hybridized along with a reference RNA from the whole body of 4 days old D. melanogaster male. Gene expression in hybrids were compared to parental gene expression in order to isolate misexpressed genes in each hybrids. In order to reveal the cross effect misexpressed genes in hybrids were compared to identify genes commonly misexpressed and genes genes misexpressed in only one hybrid.
Project description:We used RNA sequencing to examine the transcriptomes of male and female heads from experimentally-evolved D. melanogaster populations after 117 generations of mating system manipulation in order to examine the pattern of evolution in sex-biased genes. Examined head transcriptomes of 3 monogamous populations and 3 polygamous populations, both males and females, for 12 total samples.
Project description:Species often produce sterile hybrids early in their evolutionary divergence, and some evidence suggests that hybrid sterility may be associated with deviations or disruptions in gene expression. In support of this idea, many studies have shown that a high proportion of male-biased genes are underexpressed compared to non-sex-biased genes in sterile F1 male hybrids of Drosophila species. In this study, we examined and compared patterns of misexpression in 4 day old sterile male F1 hybrids of Drosophila simulans and its sibling species, D. sechellia. We analyzed hybrids using genome-wide D. melanogaster arrays from the Drosophila Genome Resource Center (DGRC). The results from a custom array (GPL4022) for this species pair, from the custom array and the genome-wide array for the D. simulans-D. mauritiana species pair, and from the larvae of these two species pairs using the custom array, are presented separately. Keywords: Comparison of pure-species Drosophila expression to hybrid expression