Project description:The Zika outbreak, spread by the Aedes aegypti mosquito, highlights the need to create high-quality assemblies of large genomes in a rapid and cost-effective fashion. Here, we combine Hi-C data with existing draft assemblies to generate chromosome-length scaffolds. We validate this method by assembling a human genome, de novo, from short reads alone (67X coverage, Sample GSM1551550). We then combine our method with draft sequences to create genome assemblies of the mosquito disease vectors Aedes aegypti and Culex quinquefasciatus, each consisting of three scaffolds corresponding to the three chromosomes in each species. These assemblies indicate that virtually all genomic rearrangements among these species occur within, rather than between, chromosome arms. The genome assembly procedure we describe is fast, inexpensive, accurate, and can be applied to many species.
Project description:we report a transcriptome-wide comparative investigation between surface and cave species in Sinocyclocheilus. De novo transcriptome assemblies were performed on surface and cave species; then the Sinocyclocheilus contigs were annotated with Gene Ontology. RNA-Seq assays revealed reduced transcription of a series of visual phototransduction and retinal disease related genes in cave-dwelling species compared with surface species. Degeneration of the retina in Sinocyclocheilus cavefish might occur in a lens-independent way by the down-regulation of several transcriptional factors, which have direct roles in retina development and maintenance, such as crx, rorb and Wnt pathway members. Examination of 2 different eye samples in 2 Sinocyclocheilus species.
Project description:Here, de novo transcriptome assemblies for leaf and flower tissues of Forsythias were performed, resulting in 81913 unigenes of F. suspensa, 88491 unigenes of F. viridissima and 69458 unigenes of F. koreana (F. viridissima var. koreana). Classification of the annotated unigenes by gene ontology terms and KEGG pathways was used to explore transcriptomic differences among the Forsythias. Orthogroup was introduced to compare expression levels of unigenes in tissues from different species, which unveiled that three leaf tissues of Fosythias were closely correlated based on expression values of orthologous unigenes. Showing high expression mainly in leaves of F. viridissima and F. koreana, candidate homologs for genes involved in the biosynthetic pathway of lignans and phenylethanoid glycosides were determined in these transcriptome assemblies.
Project description:Here, de novo transcriptome assemblies for leaf and flower tissues of Forsythias were performed, resulting in 81913 unigenes of F. suspensa, 88491 unigenes of F. viridissima and 69458 unigenes of F. koreana (F. viridissima var. koreana). Classification of the annotated unigenes by gene ontology terms and KEGG pathways was used to explore transcriptomic differences among the Forsythias. Orthogroup was introduced to compare expression levels of unigenes in tissues from different species, which unveiled that three leaf tissues of Fosythias were closely correlated based on expression values of orthologous unigenes. Showing high expression mainly in leaves of F. viridissima and F. koreana, candidate homologs for genes involved in the biosynthetic pathway of lignans and phenylethanoid glycosides were determined in these transcriptome assemblies.
Project description:Here, de novo transcriptome assemblies for leaf and flower tissues of Forsythias were performed, resulting in 81913 unigenes of F. suspensa, 88491 unigenes of F. viridissima and 69458 unigenes of F. koreana (F. viridissima var. koreana). Classification of the annotated unigenes by gene ontology terms and KEGG pathways was used to explore transcriptomic differences among the Forsythias. Orthogroup was introduced to compare expression levels of unigenes in tissues from different species, which unveiled that three leaf tissues of Fosythias were closely correlated based on expression values of orthologous unigenes. Showing high expression mainly in leaves of F. viridissima and F. koreana, candidate homologs for genes involved in the biosynthetic pathway of lignans and phenylethanoid glycosides were determined in these transcriptome assemblies.
Project description:we report a transcriptome-wide comparative investigation between surface and cave species in Sinocyclocheilus. De novo transcriptome assemblies were performed on surface and cave species; then the Sinocyclocheilus contigs were annotated with Gene Ontology. RNA-Seq assays revealed reduced transcription of a series of visual phototransduction and retinal disease related genes in cave-dwelling species compared with surface species. Degeneration of the retina in Sinocyclocheilus cavefish might occur in a lens-independent way by the down-regulation of several transcriptional factors, which have direct roles in retina development and maintenance, such as crx, rorb and Wnt pathway members.
