Mus musculus
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA246773 | ENA |
REPOSITORIES: ENA
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Project description:Microarrays were used to assess the gene expression patterns in the CA1, CA3, and dentate gyrus of the rTg4510 mouse line at 6.1 months of age. This line harbors a repressible mutant human Tau transgene under the Camk2a promoter. Both mice with just the tet-Transactivator alone and no transgenes ('double negative') were used as comparison groups. Cellular layers of the CA1, CA3, and dentate gyrus (DG) from 5 or 6 mice per genotype at age 6.1 months were laser capture dissected, RNA was isolated, and hybridization to Affymetrix microarrays performed.
2014-06-14 | E-GEOD-57583 | biostudies-arrayexpress
Project description:Introgressed variants from other species can be an important source of genetic variation because they may arise rapidly, can include multiple mutations on a single haplotype, and have often been pretested by selection in the species of origin. Although introgressed alleles are generally deleterious, several studies have reported introgression as the source of adaptive alleles-including the rodenticide-resistant variant of Vkorc1 that introgressed from Mus spretus into European populations of Mus musculus domesticus. Here, we conducted bidirectional genome scans to characterize introgressed regions into one wild population of M. spretus from Spain and three wild populations of M. m. domesticus from France, Germany, and Iran. Despite the fact that these species show considerable intrinsic postzygotic reproductive isolation, introgression was observed in all individuals, including in the M. musculus reference genome (GRCm38). Mus spretus individuals had a greater proportion of introgression compared with M. m. domesticus, and within M. m. domesticus, the proportion of introgression decreased with geographic distance from the area of sympatry. Introgression was observed on all autosomes for both species, but not on the X-chromosome in M. m. domesticus, consistent with known X-linked hybrid sterility and inviability genes that have been mapped to the M. spretus X-chromosome. Tract lengths were generally short with a few outliers of up to 2.7 Mb. Interestingly, the longest introgressed tracts were in olfactory receptor regions, and introgressed tracts were significantly enriched for olfactory receptor genes in both species, suggesting that introgression may be a source of functional novelty even between species with high barriers to gene flow.
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