数字农科院2.0

Effects Of Genetic Selection And Threonine On Meat Quality In Pekin Ducks

文献类型： 外文期刊

作者： Jiang, Y; Xie, M; Tang, J; Zhou, ZK; Zhang, YS; Chen, GH; Hou, SS

作者机构：

关键词： Duck; Threonine; Fatty Acids Profile; Meat Quality

期刊名称： POULTRY SCIENCE

ISSN：

年卷期： 2020 年 99 卷 5 期

页码：

收录情况： JCR（2021版）

摘要： The present study was conducted to investigate the effects of genetic selection and threonine levels on meat quality in Pekin ducks. At 15 D of age, 192 lean ducks and 192 fatty ducks were selected and allotted to one of three treatments with 8 replicates with similar BW (8 ducks/cage), respectively. All ducks were fed the experimental diets (0.00, 0.15, and 0.30% added threonine) for 21 D from 15 to 35 D of age. The results showed that fatty ducks had higher (P, 0.001) feed intake, feed/gain ratio, abdominal fat percentage, and sebum percentage and lower (P 5 0.001) breast muscle percentage compared with that of lean ducks. The fattytype and lean-type ducks had similar weight gain and BW. Dietary threonine supplementation improved (P, 0.05) growth performance and increased breast muscle percentage in lean-type ducks, but it did not affect (P. 0.05) those indices in fatty-type ducks. Lean ducks had higher (P, 0.001) hepatic contents of total lipids, triglyceride, cholesterol, and plasma low-density lipoprotein cholesterol concentration, and dietary threonine supplementation decreased (P, 0.05) hepatic total lipid, cholesterol, and triglyceride contents in lean ducks, but it had no influence on hepatic lipids in fatty ducks (P. 0.05). Lean ducks had higher (P, 0.05) concentrations of monounsaturated fatty acid (MUFA), and C18-polyunsaturated fatty acid (PUFA) in the liver, PUFA in the breast muscle, and C18:3n6 and C18:3n3 in plasma and lower C20-PUFA and C22-PUFA in the liver and MUFA in plasma, compared with fatty ducks. Threonine supplementation increased PUFA, N3PUFA, and n6-PUFA in plasma and hepatic fatty acids profiles in lean ducks (P. 0.05) but had on influence on total MUFA and total PUFA in the liver, breast muscle, and plasma in fatty ducks (P. 0.05). In conclusion, genetic selection toward meat production and threonine supplementation increases meat production and PUFA contents, which would influence eating quality, but it is benefit for human health.

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