The objective of this study was to evaluate the effects of dietary linoleic acid (LA) on growth performance, antioxidant capacity, and lipid metabolism in pigeon squabs by supplementing LA in their parental diets. A completely randomized design that consisted of a control group, 1% dietary LA addition group (LA1%), 2% dietary LA addition group (LA2%), and 4% dietary LA addition group (LA4%) was used. Six squabs from each treatment were randomly sampled at the day of hatch and days 7, 14, and 21 after hatch. The results showed that parental dietary LA had no significant influence (P > 0.05) on body weight (BW) gain or relative organ weights (% of BW) in squabs. The activities of superoxide dismutase, catalase, and glutathione peroxidase in the LA1% were significantly increased (P < 0.05) compared with those in the control group. The malondialdehyde content in the LA1% was significantly lower (P < 0.05) than that in the control group. The levels of serum triglyceride in the LA1% and LA2% were significantly decreased (P < 0.05) compared with those in the control group, whereas the serum high-density lipoprotein cholesterol level in the LA1% and LA2% and the free fatty acid level in the LA4% were significantly higher (P < 0.05) than those of the control group. The activities of lipoprotein lipase, hepatic lipase, and hormone-sensitive lipase in the LA1% were significantly higher (P < 0.05) than those in the control group. The 3-hydroxy-3-methylglutaryl coenzyme A reductase activity in the LA1% and the hormone-sensitive lipase activity in the LA4% were significantly decreased (P < 0.05) compared with those in the control group. The mRNA expression of carnitine palmitoyltransferase 1, acyl-CoA 1, and peroxisome proliferator-activated receptor α was significantly upregulated (P < 0.05) in the LA1% compared with that in the control group. The Oil Red O staining area in the LA1% and LA2% was significantly reduced compared with that in the control group. The results indicated that although supplemental LA had negligible effects on growth and development in pigeon squabs, parental dietary LA at a concentration of 1% could have beneficial effects on maintaining squabs healthy as reflected by improved antioxidant capacity and lipid metabolism.

中文翻译：

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父母膳食亚油酸对家鸽（Columba livia）生长性能、抗氧化能力和脂质代谢的影响。


本研究的目的是通过在亲代日粮中补充亚油酸（LA）来评估日粮亚油酸（LA）对乳鸽生长性能、抗氧化能力和脂质代谢的影响。采用完全随机设计，包括对照组、1%膳食LA添加组(LA1%)、2%膳食LA添加组(LA2%)和4%膳食LA添加组(LA4%)。在孵化当天和孵化后第 7、14 和 21 天，对每个处理的 6 只雏鸟进行随机取样。结果表明，亲本膳食 LA 对乳鸽的体重 (BW) 增加或相对器官重量 (BW 的%) 没有显着影响 (P > 0.05)。 LA1%组超氧化物歧化酶、过氧化氢酶、谷胱甘肽过氧化物酶活性较对照组显着升高（P<<0.05）。 LA1%中丙二醛含量显着低于对照组（P<<0.05）。 LA1%和LA2%组血清甘油三酯水平较对照组显着降低（P<<0.05），而LA1%和LA2%组血清高密度脂蛋白胆固醇水平及游离脂肪酸水平显着降低（P<<0.05）。 LA4%中的水平显着高于对照组（P< 0.05）。 LA1%组脂蛋白脂肪酶、肝脂肪酶、激素敏感脂肪酶活性显着高于对照组（P<<0.05）。与对照组相比，LA1%的3-羟基-3-甲基戊二酰辅酶A还原酶活性和LA4%的激素敏感性脂肪酶活性显着降低（P<<0.05）。 与对照组相比，LA1%组中肉碱棕榈酰转移酶1、酰基辅酶A 1和过氧化物酶体增殖物激活受体α的mRNA表达显着上调（P<<0.05）。 LA1%和LA2%油红O染色面积较对照组显着减少。结果表明，虽然补充LA对乳鸽生长发育的影响可以忽略不计，但亲代日粮中浓度为1%的LA可以对维持乳鸽健康产生有益作用，表现为抗氧化能力和脂质代谢的改善。