Key result
Identical nutrient-rich diets yield no difference in somatotropic mRNA expression between Langshan and Arbor Acres chickens.
Why the study?
Changes in gene expression of the somatotropic, thyrotropic, and corticotropic axes during embryonic and postnatal development in Langshan and Arbor Acres chickens and their response to nutrient intake were investigated to improve molecular breeding.
Population
Langshan and Arbor Acres broiler chickens during embryonic and postnatal development
Comparison
Langshan chickens fed LS diet or AA diet vs Arbor Acres chickens fed AA diet
Design
Preclinical gene expression study
Follow-up
Embryonic day 8 to postnatal day 42
Authors
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Equal GH axis transcripts under uniform nutrition across breeds; leaves open nutrient-gene interactions driving growth differences in poultry.
Select genes show parallel expression during development, and differences in body weight and gene expression respond differently to nutrient intake in Langshan and Arbor Acres chickens.
LÜ et al. (2008) studied Development of Langshan and Arbor Acres chickens. Nutrient-rich AA diet vs. Less nutritious LS diet was evaluated on mRNA expression of the somatotropic, thyrotropic, and corticotropic axes. Langshan and Arbor Acres chickens fed the same nutrient-rich diet showed no differences in pituitary GH, hypothalamic SS, ghrelin, hepatic IGF-I, or GH receptor mRNA expression.
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