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|標題:||Feed restriction ameliorates metabolic dysregulation and improves reproductive performance of meat-type country chickens||作者:||Pan, Yu-En
Walzem, Rosemary L.
|關鍵字:||Follicle atresia;Inflammation;Meat-type hens;Obesity;Selection;Animal Feed;Animal Nutritional Physiological Phenomena;Animals;Eating;Eggs;Female;Meat;Metabolic Diseases;Oviparity;Poultry Diseases;Caloric Restriction;Chickens;Reproduction||Project:||Animal Reproduction Science, Volume 151, Issue 3-4, Page(s) 229-236.||摘要:||
Restricted feed intake improves egg production in Cornish×Plymouth Rock (broiler) hens. Red-feather (RF) and Black-feather (BF) chickens are 2 local strains of non-broiler meat-type chickens whose egg production has declined with continued selection for meat yield, and which are unstudied regarding restricted feeding and egg-laying improvement. Sixteen week old RF and BF pullets were either fed ad libitum (AL) or restricted to 85% AL intake (R). At 35wk and 50wk R-hens showed improved egg production and less abnormal ovarian morphology than AL-hens. Obesity, hepatic steatosis, lipotoxic change to plasma lipids, and systemic inflammation induced by AL feeding in RF and BF hens were similar to those observed previously in AL-broiler hens. Egg production was negatively correlated to body weight, fractional abdominal fat weight and plasma NEFA concentrations in AL hens (P<0.05). AL-hen hierarchical follicles accumulated ceramide and increased interleukin-1β production (P<0.05) in conjunction with increased granulosa cell apoptosis, follicle atresia, ovarian regression, and reduced plasma 17β-estradiol concentrations (P<0.05). The present outcomes from non-broiler but nevertheless meat-type country chicken strains indicate that selection for rapid growth and increased meat yield fundamentally changes energy metabolism in a way that renders hens highly susceptible to reproductive impairment from lipid dysregulation and pro-inflammatory signaling rather than impaired resource allocation per se.
|Appears in Collections:||動物科學系|
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