Project description:Sorghum is a C4 cereal important not only as food, but also as forage and a bioenergy resource. Its resistance to harsh environments has made it an agriculturally important research subject. Recent accumulation of genomic and transcriptomic information has facilitated genetic studies. Yet genome-wide translational profiles in sorghum are still missing, although increasing evidence has demonstrated that translation is an important regulatory step, and the transcriptome does not necessarily reflect the profile of functional protein production in some organisms. Deep sequencing of ribosome-protected mRNA fragments (ribosome profiling, or Ribo-seq) has enabled genome-wide analysis of translation. In this study, we took advantage of Ribo-seq and identified actively translated reading frames throughout the genome. We detected translation of 7,304 main ORFs annotated in the sorghum reference genome version 3.1 and revealed a number of unannotated translational events. A comparison of the transcriptome and translatome between sorghums grown under normal and sulfur-deficient conditions revealed that gene expression is modulated independently at transcript levels and translation levels. Our study revealed the translational landscape of sorghum’s response to sulfur and provides datasets that could serve as a fundamental resource to extend research on sorghum, including translational studies.
Project description:We used small RNA-Seq to characterize heart non-coding RNAs in 85 inbred strains of mice from the Hybrid Mouse Diversity Panel (HMDP), a reference resource population for cardiovascular and metabolic traits.
Project description:Identify genes in the epididymal adipose tissue whose expression is under genetic regulation in the hybrid mouse diversity panel. The hybrid mouse diversity panel is comprised of classical inbred and recombinant inbred wild type mice. The RMA values of genes were used for genome wide association as described in Bennett et al Genome Research 2010. These data are used to identify candidate genes at loci associated with obesity and dietary responsiveness. GWAS for expression of epididymal adipose tissue in inbred strains
Project description:Identify genes in the heart whose expressions under genetic regulation in the hybrid mouse diversity panel. The hybrid mouse diversity panel is comprised of classical inbred and recombinant inbred wild type mice. The RMA values of genes were used for genome wide association as described in Bennett et al Genome Research 2010. These data used to identify candidate genes at loci associated with atherosclerosis.
Project description:Identify genes in the epididymal adipose tissue whose expression is under genetic regulation in the hybrid mouse diversity panel. The hybrid mouse diversity panel is comprised of classical inbred and recombinant inbred wild type mice. The RMA values of genes were used for genome wide association as described in Bennett et al Genome Research 2010. These data are used to identify candidate genes at loci associated with obesity and dietary responsiveness.
Project description:To understand the full range of expression variation, alternative splicing, and the genetics of regulatory variation in humans, we have sequenced the genomes, exomes, and transcriptomes of 45 individuals in the Human Genome Diversity Panel (HGDP) from seven worldwide populations that span the geographic breadth of human migration history. We find few genes that are systematically differentially expressed among populations. Further, allelic expression analysis indicates that previously mapped common regulatory variants identified in eight HapMap3 populations have similar effects across HGDP populations, suggesting that the cellular effects of common variants are shared even across very diverse populations. In contrast, comparisons of alternative splicing across pairwise populations reveal highly significant differences, with ~20% of alternatively spliced exons varying significantly by population. Greater genomic differences are associated with significantly more splicing variability overall. Together, these results provide a resource and an estimate for the degree of sharing of gene expression, alternative splicing, and regulatory genetics across populations. Lymphoblastoid cell line mRNA profiles of 45 human samples from the Human Genome Diversity Panel sequenced on an Illumina HiSeq 2000, each sample library was sequenced in duplicate to produce a merged sample bam.
Project description:Liver fibrosis is a multifactorial trait that develops in response to chronic liver injury. Our aim was to characterize the genetic architecture of carbon tetrachloride (CCl4)-induced liver fibrosis using the Hybrid Mouse Diversity Panel (HMDP), a panel of over 100 genetically distinct mouse strains optimized for genome wide association studies and systems genetics. Chronic liver injury was induced by CCl4 injections twice weekly for six weeks. 437 mice received CCl4 and 256 received vehicle, after which animals were sacrificed for liver histology and gene expression. Using automated digital image analysis, we quantified fibrosis as the collagen proportionate area % (CPA%) of the whole section, excluding normal collagen. We discovered broad variation in fibrosis among the HMDP strains, demonstrating a significant genetic influence on this trait, with an estimated heritability (H2) of 44%. Genome-wide association analyses revealed significant and suggestive loci underlying susceptibility to fibrosis, some of which overlapped with loci identified in mouse crosses and human population studies. Liver global gene expression was assessed by RNA sequencing, and gene set enrichment analyses identified the underlying pathways, of which stellate cell involvement was prominent. We also performed expression quantitative trait locus analyses to identify strong causal candidate genes. Our results provide a rich resource for the design of experiments to understand mechanisms underlying fibrosis and for rational strain selection when testing anti-fibrotic drugs.