Project description:We explored the relationship between the evolutionary dynamics of CTCF binding and the functional stability of higher order genome structures, by performing ChIP-seq experiments in closely related Mus species or strains and intersecting with Hi-C-derived topologically associating domains (TADs) and expression data. To complement our data analyses, we generated RNA-seq libraries from two Mus caroli adult male individuals.
Project description:We performed an inter-species comparison of murine spermatogenesis using the inbred strains C57B6J, CAST/EiJ and CAROLI/EiJ to investigate the cell type-specific evolution of gene expression levels among closely related species. We also used F1 crosses of C57B6J and CAST/EiJ to investigate context-specific regulatory effects on gene expression in cis and trans by measuring allele-specific expression (Goncalves et al. 2012; Wittkopp et al. 2021). To this end, single-cell RNA-Sequencing data was generated from dissociated testicular tissue in each mouse strain using the 10x Genomics scRNA-Seq platform.
Project description:RNA-seq analysis of 115 randomly selected (TRAMP x WSB/EiJ) F2 prostates that had been harvested at experimental termination was performed to identify metastasis associated transcriptomic changes
Project description:Technical control for allelic detection using Smart-seq3. Liver RNA from pure C57BL6/J and CAST/EiJ strains was combined at varying ratios (0:1, 1:7, 1:3, 3:5, 1:1, 5:3, 3:1, 7:1, 1:0) for a total of 200 pg RNA per sample.
Project description:We have identified candidate genes from the Feml2 QTL influencing femur length through allele specific expression analysis of growth plates in C57BL/6J x CAST/EiJ F1 hybrids. This work provides the foundation to identify novel genes affecting bone geometry.
Project description:Maize (Zea mays L.) was hydroponically grown for 14 days and then stressed with hypoxia. Maize roots were sampled after 24 hours and analyzed by mass spectrometry.
Project description:To characterize the genetic basis of hybrid male sterility in detail, we used a systems genetics approach, integrating mapping of gene expression traits with sterility phenotypes and QTL. We measured genome-wide testis expression in 305 male F2s from a cross between wild-derived inbred strains of M. musculus musculus and M. m. domesticus. We identified several thousand cis- and trans-acting QTL contributing to expression variation (eQTL). Many trans eQTL cluster into eleven M-bM-^@M-^Xhotspots,M-bM-^@M-^Y seven of which co-localize with QTL for sterility phenotypes identified in the cross. The number and clustering of trans eQTL - but not cis eQTL - were substantially lower when mapping was restricted to a M-bM-^@M-^XfertileM-bM-^@M-^Y subset of mice, providing evidence that trans eQTL hotspots are related to sterility. Functional annotation of transcripts with eQTL provides insights into the biological processes disrupted by sterility loci and guides prioritization of candidate genes. Using a conditional mapping approach, we identified eQTL dependent on interactions between loci, revealing a complex system of epistasis. Our results illuminate established patterns, including the role of the X chromosome in hybrid sterility. Gene expression was measured in whole testis in males aged 70(M-BM-15) days. Samples include 294 WSB/EiJ x PWD/PhJ F2s, 11 PWD/PhJ x WSB/EiJ F2s, 8 WSB/EiJ, 8 PWD/PhJ, 6 PWD/PhJ x WSB/EiJ F1s and 4 WSB/EiJ x PWD/PhJ F1s.
Project description:To identify components of the U7 snRNP, we used cleavage-resistant histone pre-mRNA containing biotin and a photo-sensitive linker and purify processing complexes from Drosophila and mouse nuclear extracts.