关键词: 脱氢表雄酮, 母体效应, 脂肪代谢, 肌肉品质

Abstract: In order to study the effects of maternal dehydroepiandrosterone（DHEA） on lipid metabolism parameters and muscle quality of the offspring AA broilers. AA broiler breed were randomly divided into three equal groups (25 broilers per group), all broilers were offered the same basal diet with added DHEA at levels of 0 (control), 25 and 50 mg·kg1. Eggs were collected after DHEAtreatment and incubated at 38.5 ℃ with a relative humidity of 60%. Onehundred and eighty (180) offspring AA broilers were divided into 0 (control), 25 and 50 mg·kg1 according to the doses at the diet of maternal DHEA, and each group was assigned to 1 of 3 treatments. Broilers in each group were kept in three pens (20 broilers per pen). At the conclusion of the experiment, chickens were weighed individually at 21 days to determine final body weight. After the broilers were slaughtered, gender was identified, abdominal fat and liver were collected, blotted dry and weighed. Blood samples were taken and retained for subsequent analysis. The results showed that maternal DHEA could significantly decreased the daily feed intake/daily gain of offspring broilers（P<0.01）, as compared with the control group, however that no significantly difference on the daily gain and daily feed intake （P>0.05）. Male offspring broilers fed with 50 mg·kg1 of maternal DHEA could significantly increased the content of blood glucose（P<0.01）, nonesterified fatty acid（P<0.05）, high density lipoproteincholesterol （P<0.05） in serum and decreased the content of triglycerides in the liver（P<0.01） than that at the control, but have no effect on the content of triglycerides and total cholesterol in the serum; also, male offspring broilers fed with maternal DHEA have no effect on the level of T3, T4, glucagon and leptin, but offspring broilers fed with 25 mg·kg1 maternal DHEA could significantly increased the ratio of T3/T4（P<0.05）. As for female offspring broilers fed with maternal DHEA, 25 mg·kg1 DHEA could significantly increased the content of blood glucose（P<0.01）, high density lipoproteincholesterol（P<0.05）, and T4（P<0.01）, at the same time, decreased the the ration of T3/T4（P<0.05）; 50 mg·kg1 DHEA could significantly increased the content of triglycerides, total cholesterol, nonesterified fatty acid and blood glucose in serum than that at the control（P<0.01）. Male offspring broilers fed with maternal DHEA could significantly increase the breast and thigh muscle weight percentage but have no effect on the female offspring broilers. Offspring broilers fed with maternal DHEA could decreased the diameter of leg muscle fiber（P＜0.01） and breast muscle fiber（P＜0.05）,also, it could increased the density of leg muscle fiber（P＜0.01） and breast muscle fiber （P＜0.01）than that at the control. The results indicate that maternal DHEA could reduce the fat deposition and improve the muscle quality in the offspring broilers.

Key words: dehydroepiandrosterone (DHEA), maternal effect, lipid metabolism, muscle quality