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Transcriptome analysis from Longissimus dorsi muscle of Nellere steers

ABSTRACT: Differential expression study between Nellore steers with extremes values of genomic estimated breeding value

PROVIDER: PRJEB6732 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	ERR565412.fastq.gz	Fastqsanger.gz
	ERR565412_1.fastq.gz	Fastqsanger.gz
	ERR565412_2.fastq.gz	Fastqsanger.gz
	ERR565413.fastq.gz	Fastqsanger.gz
	ERR565413_1.fastq.gz	Fastqsanger.gz

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Sheep longissimus dorsi (LD) muscle from 40 individual progeny belonging to six Poll Dorset industry sires

Project description:Expression profiling of sheep born to Australian industry sires with high and low genetic merit (Estimated Breeding Values or EBVs) for eye muscle depth (EMD). Progeny (40) from six Poll Dorset sires representing well defined extremes of EBVs for Eye Muscle Depth (low EBV EMD and high EBV EMD) were selected for analysis. The six sires were Australian industry sires with three sires representative of low EBV EMD and three representing high EBV EMD. Microarrays were used for transcription profiling of skeletal muscle samples taken from 40 individual progeny belonging to six Poll Dorset industry sires, with 3 sires extreme for high and 3 sires extreme for low muscling (based on EBV for EMD).

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Comparison of transcriptome profiles between bulls and steers in the longissimus dorsi muscle of Korean cattle

Project description:Purpose: The goals of this study are to determine effects of castration on gene expression in longissimus dorsi muscle by comparing transcriptome profiles and to search candidate genes related with beef quality like flavor, tenderness, juiciness and fat deposition Methods: longissimus dorsi muscle mRNA profiles of 3 bulls and 3 steers of Korean cattles were generated by RNA sequencing using Illumina NextSeq 500. After quality checking, Tophat2 software was used for read mapping, and EdgeR was used to identify differentially expressed genes (DEGs) between bulls and steers. Gene ontology pathway analysis on DEGs was conducted with DAVID tool for categorization of DEGs. Results: Using an optimized data analysis workflow, we mapped about 58 million sequence reads per sample to the bovine genome (build UMD3.1) and identified 18,027 expressed genes in the longissimus dorsi muscle of bulls and steers with TopHat2 workflow. RNA-seq data confirmed 1,146 differentially expressed genes (adjusted p-value, FDR <0.05). Conclusions: We comparatively analyzed the transcriptome profile from longissimus dorsi muscle of bulls and steers of Korean cattles using NGS and identified DEGs between bulls and steers. The functional annotation analysis of DEGs found that transcriptome profile difference in longissimus dorsi muscle by castration.

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Sheep longissimus dorsi (LD) muscle from 40 individual progeny belonging to six Poll Dorset industry sires

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Project description:Transcripome of longissimus dorsi muscle was compared between Korean cattle bulls and steers by using a customized bovine Combimatrix microarray containing 10,199 genes. A customized bovine Combimatrix microarray containing 10,199 genes were constructed, and transcripome of longissimus dorsi muscle was compared between Korean cattle bulls (3 bulls) and steers (3 high-marbled and 3 low-marbled steers) by using the microarray hybridzation.

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Transcriptome changes following castration of Korean cattle bulls in longissimus dorsi muscle

Project description:Transcripome of longissimus dorsi muscle was compared between Korean cattle bulls and steers by using a customized bovine Combimatrix microarray containing 10,199 genes.

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Identification of a circulating miRNA that is involved in meat yield and connects exosomes and longissimus dorsi muscle in Korean cattle steers

Project description:MicroRNAs (miRNAs) regulate gene expression. The aim of this study was to identify circulating miRNAs that are involved with meat yield and connect exosomes and longissimus dorsi (LD) muscle in Korean cattle steer. Thus, we performed analyses of the carcass characteristics, exosome extraction, bovine miRNA array, mature miRNA qPCR, bioinformatics, and qPCR. Our analysis of the carcass characteristics relative to the yield grade (YG) showed that the yield index (YI) and rib eye area were the highest, whereas the backfat thickness was the lowest for YG A cattle among the three YGs. We performed a miRNA microarray and a Venn diagram analysis to sort the circulating miRNAs that connect exosomes and LD muscle. Mature miRNA qPCR showed that miR-15a (r = 0.84), miR-26b (r = 0.91), and miR-29c (r = 0.92) had positive relationships with exosomes and LD muscle. In YG A cattle, miR-26b was considered to be a circulating miRNA connecting exosomes and LD muscle because the expression pattern of miR-26b was similar in the microarray and miRNA qPCR for miR-26b-targeted genes, where the expression levels of DIAPH3 and YOD1 were lower than those in YG C cattle. Our results suggest that circulating miR-26b may participate in cell maintenance by regulating DIAPH3 and YOD1 in the LD muscle of Korean cattle. 29 or 30 month Korean cattle steers were classified by yield grade(YG) A, B, and C. miRNA expression patterns for exosome and LD muscle were compared among YGs.

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Effect of breed and dietary composition on the miRNA profile of beef steers divergent for feed efficiency

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