Tryptophan improves antioxidant capability and meat quality by reducing responses to stress in nervous Hu sheep
文献类型： 外文期刊
作者： Wang, Jiasheng 1 ; Ding, Luoyang 1 ; Yu, Xiang 1 ; Wu, Feifan 1 ; Zhang, Jinying 1 ; Chen, Peigen 1 ; Qian, Shuhan 1 ; Wang, Mengzhi 1 ;
作者机构： 1.Yangzhou Univ, Coll Anim Sci & Technol, Lab Metab Manipulat Herbivorous Anim Nutr, Yangzhou 225009, Peoples R China
2.Univ Western Australia, Sch Agr & Environm, Perth, WA 6009, Australia
3.Xinjiang Acad Agr Reclamat Sci, State Key Lab Sheep Genet Improvement & Hlth Prod, Shihezi 832000, Xinjiang, Peoples R China
关键词： Hu sheep; Temperament; Tryptophan; Serotonin; Carcass traits
期刊名称：MEAT SCIENCE （ 影响因子：7.1； 五年影响因子：6.6 ）
ISSN： 0309-1740
年卷期： 2023 年 204 卷
页码：
收录情况： SCI
摘要： In sheep, the effect of tryptophan (Trp) on behavioural traits that are associated with temperament and any effects on production traits is unknown. The hypothesis of this study is that the supplementation of Trp would improve temperament by enhancing serotonin production, which is beneficial to meat production subsequently in sheep. Twelve ewes that had the lowest and 12 ewes that had the highest behavioural responses to human contact were selected into the calm and the nervous groups respectively. Then, the ewes from each group were equally assigned into two treatments that were treated with the basal diet and the diet with extra 90 mg/kg/ d Trp for 30 d. The temperament traits, the growth performance, the biochemicals that are related to health the slaughter performance and meat quality were measured at the end of feeding experiment. The findings in this study suggested the Hu sheep with calm temperament would experience less stress during production, resulting in less oxidative stress, better growth performance, slaughter traits and carcass traits, compared to the nervous sheep. Meanwhile, the dietary supplementation of Trp reduced stress responses by enhancing production of 5-HT in sheep from the nervous group which is beneficial to improve the production traits that mentioned above.
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