Project description:Copy number variation (CNV) is important and widespread in the genome, and is a major cause of disease and phenotypic diversity. Herein, we perform a genome-wide analysis of CNVs in the 12 diversified chicken genomes based on next-generation sequencing. We apply aCGH experiments to confirm our predicted CNVs. Results from aCGH agree well with our findings and the Pearson’s correlation values between the test and reference samples range from 0.395 to 0.740. The whole blood samples were collected from Beijing You (BY), Dongxiang (DX), Luxi Game (LX), Red Jungle Fowl (RJF), Shouguang (SG), Silkie (SK), Tibetan (TB), Wenchang (WC), and White Plymouth Rock (WR), and genomic DNA was isolated using standard phenol/chloroform extraction methods. Each test sample labeled with Cy3 was mixed with Red Jungle Fowl as reference sample labeled with Cy5. All process and analysis was performed in terms of standard NimbleGen procedure. However, due to some uncontrollable factors, none of results were obtained in three consecutive trials for CS, RIR and WL, so we had to choose a similar Agilent custom-designed 1*1.0 M array.
Project description:The proteomic profiles of silky fowl egg yolk (SFEY) and Leghorn egg yolk (LEY) were analysed by bottom-up label-free liquid chromatography tandem-mass spectrometry (LC-MS/MS), aiming to provide a theoretical basis for understanding the proteomic and biological differences between the two yolks and further develop the nutritional and biomedical value of silky fowl eggs.
Project description:We report the genome-wide DNA methylation mapping of chicken by methylated DNA immunoprecipitation following by highthroughput sequencing, and the gene expression profile of chicken by RNA-seq. For meDIP-seq, about 17,202,074 to 27,501,760 reads were generated for the tissue and liver tissues of the red jungle fowl and the avian broiler each. We found that compared with the red jungle fowl, DNA methylation in muscle tissue of the avian broiler, showed dramatically decline on a genome-wide scale. Furthermore, the length of the highly methylated regions (HMRs) has become shorter in the avian broiler, which has suffered intense artificial selection. In addition to the global changes in DNA methylation, transcriptome-wide analysis of the two breeds of chicken revealed that the patterns of gene expression in the domestic chicken have undergone a specific bias towards a pattern that is more suited to human-made environments with variable expression in certain gene functions, such as immune response and fatty acid metabolism. Our results demonstrated a potential role of epigenetic modification in animal domestication besides the genetic variations. Examination of whole genome DNA methylation status in liver and muscle of two chicken breeds.
Project description:With the purpose to elucidate the expression changes of host genes of SPF chickens infected with duck-origin H7N9 subtype avian influenza virus at 24 hours post-infection(hpi) and fowl adenovirus-4 at 48 dpi. The spleens of SPF chickens infected with duck-origin H7N9 subtype avian influenza virus and fowl adenovirus-4 were collected and high throughout sequenced. Compared with the control group, there were 2426 differentially expressed genes were obtained in the duck-origin H7N9 subtype avian influenza virus group, including 913 up-regulated genes and 1513 down-regulated genes, and there were 1534 differentially expressed genes were obtained in the fowl adenovirus-4 group, including 632 up-regulated genes and 902 down-regulated genes.
Project description:To elucidate the expression changes of host genes of SPF chickens infected with fowl adenovirus-4 at 48 hours post-infection. The hearts of SPF chickens infected with fowl adenovirus-4 were collected and high throughout sequenced. Compared with the control group, there were 1797 differentially expressed genes were obtained in the infection group, including 1082 up-regulated genes and 715 down-regulated genes.