Sheep muscle proteome sequencing
Ontology highlight
ABSTRACT:
ORGANISM(S): Sheeppox Virus
SUBMITTER: 
Weimin Wang
PROVIDER: PXD030227 | iProX | Tue Dec 07 00:00:00 GMT 2021
REPOSITORIES: iProX
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Project description:Texel and Ujumqin sheep show obvious differences in muscle and fat growth, so they are ideal models not only to understand the molecular mechanism in prenatal skeletal muscle development, but to identify the potential target genes of myostatin. To elucidate the phenotypic variation between the two sheep breeds and the dynamic characteristics of gene expression in skeletal muscle during the development, we examined the development of skeletal muscle in transcriptome-wide level at 70, 85,100,120 , 135 days post coitus (dpc),birth, 1 month and 2 month. Using the specialized and standardized sheep transcriptome-wide oligo DNA microarray (Agilent), we analyzed the transcriptomic profiles of longissmuss dorsi muscle from fetuses of Texel and Ujumqin sheep. We characterized dynamic transcriptome-wide profiles that accompany the prenatal skeletal muscle and fat development in Texel and Ujumqin sheep respectively, and compared the difference in profiles of gene expression between the two sheep breeds at the same developmental stage.Some potential myostatin target genes and other genes controlling the growth of skeletal muscle and adipose were identified for further examinations. Our findings not only contribute to understand the molecular mechanism of prenatal skeletal muscle development in large precocial species, but also provide some clues for human myopathy and obesity at prenatal stages. Moreover, we also can identify putative candidate genes for meat quality traits in farm animals. Longissimus dorsi muscles were sampled from five prenatal development stages (70, 85, 100, 120 and 135 day of gestation) in Texel and eight development stages (at 70, 85, 100, 120, 135 days post coitus (dpc), birth, 1 month and 2 month) in Ujumqin sheep. There were at least three replicates at each development time in each breed. Two gene expression experiments were conducted with a total of 40 hybridizations.
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Project description:Mear prodution is the most important trait for sheep. In this study, we performed a Genome-wide association study (GWAS) by using Illumina Ovine SNP50 BeadChip in 329 purebred sheep phenotyped for 11 growth and meat production traits (birth weight, weaning weight, 6-month weight, eye muscle area, fat thickness, pre-weaning gain, post-weaning gain, daily weight gain, height at withers , chest girth and shin circumference). A total of 319 sheep and 48,198 SNPs were fitted using TASSEL 3.0 software as random effects in a mixed linear model. 36 chromosome-wise significant SNPs were identified for 7 traits and 10 of them reached genome-wide significance level consistently for post-weaning gain. Gene annotation was implemented based on the latest version3.1 ovine genome sequence (released October 2012), and meanwhile we referenced genomic information of human, bovine, mouse and rat. More than one-third SNPs (14 out of 36) were located within ovine genes , some other were located close to ovine genes (878bp-398165bp apart). 329 sheep DNA were scanned using OvineSNP50 Beadchip and the association is done between the SNP data and 11 different meat prodution traits
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