Transcriptional shifts account for divergent resource allocation in feed efficient broiler chickens

Scientific Reports
Henry ReyerKlaus Wimmers

Abstract

Considerable variation in feed efficiency (FE) has been observed in indigenous and selected meat-type chicken populations. Although this variation could be partially linked to extrinsic factors like diet, housing environment and microbiota, it further illustrates the existence of strong molecular mechanisms enabling the differential allocation of resources for various physiological processes. To further deepen the molecular basis of individual allocation capacity in male and female broilers, an RNA-seq experiment was conducted which based on a phenotyped chicken population divergent in FE. Transcriptional differences linked to FE were pronounced in intestinal and muscular tissue sites of male animals. Specifically, signalling pathways of farnesoid X receptor (FXR) and retinoid X receptor (RXR) might contribute to mediate individual FE. The transcriptional profiles suggested ACSBG2 (muscular lipid utilisation), ASBT (intestinal bile salt transport), CLEC2B (natural killer cell activation), HMGCS2 (jejunal, duodenal and muscular ketogenesis), and SCARB1 (jejunal lipid uptake) as potential mediators driving FE. Results indicate that improvements in FE exploit shifts in resource allocation which might occur at the expense of genera...Continue Reading

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Methods Mentioned

BETA
RNA-seq
PCR
electrophoresis

Software Mentioned

R Project for Statistical Computing
lmerTest
count
BiomaRt R package
arrayQualityMetrics package for R
TopHat
R
Bowtie
htseq
qvalue R package

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