Project description:We utilized Comparative Genomic Hybridization (CGH), using probes designed from de novo assembly of 10 tissues into a grand transcriptome to identify genes located on the X and Y chromosomes of a stalk-eyed fly, Teleopsis dalmanni. We use next generation sequencing of RNA to identify over 500 genes that are differentially expressed in the testes due to the effects of a driving X chromosome (XSR) in T. dalmanni. Most of these genes were X-linked, evolving more rapidly than control genes, and exhibit elevated expression in the gonads. Finally, XSR has become genetically differentiated from standard X chromosomes – using the RNA sequence data, we found nearly 1000 sites in X-linked genes and only a handful in autosomal genes where there was a fixed nucleotide difference. We conclude that XSR has led to widespread sequence and expression divergence on the X chromosome in T. dalmanni.
Project description:We utilized Comparative Genomic Hybridization (CGH), using probes designed from de novo assembly of 10 tissues into a grand transcriptome to identify genes located on the X and Y chromosomes of a stalk-eyed fly, Teleopsis dalmanni. We use next generation sequencing of RNA to identify over 500 genes that are differentially expressed in the testes due to the effects of a driving X chromosome (XSR) in T. dalmanni. Most of these genes were X-linked, evolving more rapidly than control genes, and exhibit elevated expression in the gonads. Finally, XSR has become genetically differentiated from standard X chromosomes M-bM-^@M-^S using the RNA sequence data, we found nearly 1000 sites in X-linked genes and only a handful in autosomal genes where there was a fixed nucleotide difference. We conclude that XSR has led to widespread sequence and expression divergence on the X chromosome in T. dalmanni. Two-condition experiment, female vs. male DNA, for one species with 4 biological replicates
Project description:We performed miRNA transcriptome analysis of mature medaka tissues using high-throughput next generation sequencing technology. The small RNA libraries were contructed from brain, liver and gonads in mature male and female medaka and a total of more than 128 million sequencing reads were generated from the six small RNA libraries. By comparison to known miRNA database, a total of 223 known miRNA types were identified with more than 50% expressed in brain. The expression profiling showed that almost half of the miRNAs are tissue-specific, with only 55 miRNA types from 34 families common to all tissues. A small number of miRNAs are also gender-specific. The experimental validation was performed for five represented miRNA candidates and four of them are confirmed.
2014-07-01 | GSE42696 | GEO
Project description:Transcriptome sequencing of gonads
Project description:The aim of this study was to study the gene expression profile in developing female and male gonads of Xenopus laevis at four stages: at the Nieuwkoop-Faber stage 50 (genital ridge), at NF53 (sex-determining period), NF56 (the onset of sexual differentiation), NF62 (gonads sexually differentiated).
