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Sus scrofa breed:Duroc

ABSTRACT: DNA methylation patterns of the longissimus dorsi musle in Duroc pig using Methylated DNA immunoprecipitation sequencing

PROVIDER: PRJNA307528 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR3085590.fastq.gz	Fastqsanger.gz
	SRR3085581.fastq.gz	Fastqsanger.gz
	SRR3085591.fastq.gz	Fastqsanger.gz
	SRR3085583.fastq.gz	Fastqsanger.gz
	SRR3085586.fastq.gz	Fastqsanger.gz

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Project description:The experiment aimed at studying gene expression differences in longissimus dorsi muscle from pigs from two groups: High versus low intramuscular fat (IMF). The animals were selected from a crossbred population of Landrace x Yorkshire/Landrace x Duroc animals, where we have previously found a highly significant QTL for IMF (Grindflek et al. 2001: "Detection of quantitative trait loci for meat quality in a commercial slaughter pig cross", Mammalian Genome 12(4): 299-304), and by microarray analysis we hoped to identify candidate genes for the QTL and/or pathways that are affected by the genes responsible for the QTL. Keywords: phenotype comparison

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Project description:Low protein diets supplied during the growing period of pigs can diminish their growth rate and increase the intramuscular fat (IMF) content which affects the sensorial and technological characteristics of the traits. In the present study, the effects of a low protein diet supplied during the growing diet of Duroc x Iberian crossbred pigs on several phenotypic traits and liver and longissimus dorsi transcriptome, were analysed 20 days after the differential treatment was started (EARLY) and at the end of it (FINAL). A total of 20 crossbred pigs were assigned to two different dietary treatments during the growing period: a control diet (C) and a low protein diet (LP) with the same energy and lower levels of raw protein (11%) and lysine (0.60%). The transcriptomes of liver and longissimus dorsi were quantified through RNAseq. A total of 134 differentially expressed annotated genes and new isoforms (DEGs) between C and LP diets in liver of EARLY animals; 480 DEGs in liver of LATE animals, and 128 DEGs and 68 DEGs in longissimus dorsi of EARLY and LATE animals were detected. The functional analyses revealed that low protein diet diminishes the expression in liver of genes codifying for proteins involved in immune system both in EARLY and LATE animals, affects the expression of genes involved in cholesterol homeostasis in liver and in the energy process and growth in longissimus dorsi. Pigs fed with LP diet had not higher IMF content than C ones, although some lipogenesis genes such as FASN, SCD or SREBF1 were higher expressed on their liver. A low protein diet supplied during growing period affects multiple biological process that could compromise the immune and energy state of the Duroc x Iberian crossbred pigs. These results point out that we should be very cautious before implementing this type of regime in Duroc x Iberian pigs.

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