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Glucose Tolerance and Plasma Non-Esterified Fatty Acid Levels in Chickens Selected for Low Body Weight, Red Junglefowl, and their Reciprocal Cross
Virginia Tech, Dept Anim & Poultry Sci, Blacksburg, VA 24061 USA.
Virginia Tech, Dept Anim & Poultry Sci, Blacksburg, VA 24061 USA.
Virginia Tech, Dept Anim & Poultry Sci, Blacksburg, VA 24061 USA.
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Biochemistry and Microbiology.
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2019 (English)In: The Journal of Poultry Science, ISSN 1346-7395, E-ISSN 1349-0486, Vol. 56, no 4, p. 245-252Article in journal (Refereed) Published
Abstract [en]

Responses of an individual to food deprivation, such as a 16-h fast, are complex, and are influenced by environmental and genetic factors. Domestication is an ongoing process during which adaptations to changing environments occur over generations. Food deprivation by their caretakers is less for domestic chickens than for their junglefowl ancestors. Unlike domestic chicken, the junglefowl adapted over generations to periods of food deprivation, which may be reflected in differences in metabolic responses to brief periods without food. Here, we compared the blood glucose and plasma levels of non-esterified fatty acids (NEFA) among four populations when deprived of feed for 16 h. The four populations included a domestic White Rock experimental line (LWS) maintained for generations under ad libitum feeding, adult red junglefowl (RJF), and a reciprocal cross of the lines. Although there were significant differences in adult (31-week) body weight between the RJF (683 g) and LWS (1282 g), with the weight of F-1 crosses being intermediate, the amount of abdominal fat relative to body weight was similar for all populations. Patterns for blood glucose responses to a glucose bolus after a 16-h fast were similar for the initial and final points in the parental and cross populations. However, RJF reached their peak faster than LWS, with the reciprocal cross intermediate to the parental populations. Plasma NEFA concentrations were higher after the 16-h fast than in fed states, with no population differences for the fasting state. However, in the fed state, NEFA levels were lesser for LWS than for others, which was reflected further in percentage change from fed to fasted. This larger change in LWS suggests differences in mobilization of energy substrates and implies that during domestication or development of the LWS line, thresholds for responses to acute stressors may have increased.

Place, publisher, year, edition, pages
JAPAN POULTRY SCIENCE ASSOC , 2019. Vol. 56, no 4, p. 245-252
Keywords [en]
blood glucose, chickens, heterosis, plasma NEFA, reciprocal cross
National Category
Zoology
Identifiers
URN: urn:nbn:se:uu:diva-396948DOI: 10.2141/jpsa.0180098ISI: 000492751400002OAI: oai:DiVA.org:uu-396948DiVA, id: diva2:1371887
Available from: 2019-11-21 Created: 2019-11-21 Last updated: 2019-11-21Bibliographically approved

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