早期热应激对肉仔鸡后期生长发育的影响

doi:10.11843/j.issn.0366-6964.2021.07.027

畜牧兽医学报 ›› 2021, Vol. 52 ›› Issue (7): 2052-2058.doi: 10.11843/j.issn.0366-6964.2021.07.027

早期热应激对肉仔鸡后期生长发育的影响

刘迎生^1,2, 焦洪超¹, 林海¹, 王晓鹃^1*

1. 山东农业大学动物科技学院, 泰安 271018;
2. 山东海鼎农牧有限公司, 济南 250113

收稿日期:2021-01-03 出版日期:2021-07-23 发布日期:2021-07-23
通讯作者: 王晓鹃,主要从事家禽生态营养研究,E-mail:wangxj@sdau.edu.cn
作者简介:刘迎生(1986-),男,山东临清人,硕士生,主要从事家禽营养研究,E-mail:zhesheng2005@163.com
基金资助:
国家自然科学基金（31672441）；国家重点研发计划（2018YFE0128200）；国家现代农业产业技术体系建设专项资金（CARS-40-K09）；泰山学者项目（201511023）；山东省“双一流”奖补资金

Effect of Early Heat Stress on the Growth and Development of Broilers

LIU Yingsheng^1,2, JIAO Hongchao¹, LIN Hai¹, WANG Xiaojuan^1*

1. College of Animal Science and Technology, Shandong Agricultural University, Tai'an 271018, China;
2. Shandong Haiding Agriculture and Animal Husbandry Co. LTD., Jinan 250113, China

Received:2021-01-03 Online:2021-07-23 Published:2021-07-23

摘要/Abstract

摘要： 旨在研究早期热应激对肉仔鸡后期生长发育及骨骼肌中相关信号通路基因表达的影响。本研究选取健康、体重相近的刚出壳AA肉仔鸡192只（公母各半），随机分成2组（每组4个重复，每个重复24只鸡），饲喂至3日龄时，分别给予36℃热应激处理24 h （热应激组）和正常温度（33℃）饲喂（对照组）。42日龄时每个处理选取8只鸡采取血浆，屠宰后测定胴体性能，分离胸肌样品测定骨骼肌发育有关的基因表达。结果表明，热应激当天肉仔鸡增重显著降低，但整个饲养期肉仔鸡的平均日增重显著增加（P<0.05）；与对照组相比，早期热应激有提高整个饲养期肉仔鸡平均日采食量的趋势（0<P<0.1）。早期热应激对肉仔鸡的屠宰率、半净膛重、全净膛重、肝比重、心比重、胸肌率、腿肌率、腹脂率都无显著影响（P>0.05）。早期热应激显著升高了42日龄肉仔鸡血浆酮体含量（P<0.05）。在胸肌中，早期热应激显著提高了胰岛素样生长因子（IGF-1）及其受体（IGF-1R）的基因表达（P<0.05）。本试验结果提示，早期热应激促进了肉仔鸡后期的生长发育，骨骼肌中IGF-1信号可能参与此调节过程。

关键词: 早期热应激, 肉仔鸡, 生长发育, IGF-1信号

Abstract: The experiment was conducted to investigate the effects of early heat stress on the growth and development of broilers and gene expression in skeletal muscle. One hundred and ninety-two (male and female half) healthy newborn AA broiler chickens with similar body weight were randomly divided into 2 groups (4 repetition per group, 24 chickens per repetition):heat stress treatment (heat stress group, 36℃ for 24 h) and normal temperature (control group,33℃ for 24 h) at 3 days of age. At 42 days of age, 8 chickens from each treatment were selected and slaughtered, the plasma was collected, and carcass performance was measured. Pectoralis samples were separated to determine the gene expression related to skeletal muscle development. The results showed that early heat stress significantly decreased the body weight gain of chickens at 3 days of age, but significantly increased the average daily weight gain of broilers during the whole feeding period (P<0.05). Compared with the control group, the average daily intake of broilers during the whole feeding period was increased after early heat stress (0<P<0.1). The early heat stress had no significant effect on the carcass rate, half-clean chamber rate, full-clean chamber rate, liver proportion, heart proportion, pectoral muscle rate, leg muscle rate and abdominal fat rate of broilers (P>0.05). Early heat stress significantly increased the plasma ketone body content of 42-day-old broilers (P<0.05). In pectorals, early heat stress significantly increased the expression of insulin-like growth factor (IGF-1) and its receptor (IGF-1R) genes (P<0.05). The results suggest that early heat stress improves the growth and development of broilers in the later stage, and IGF-1 signals in skeletal muscle may be involved in this regulatory process.

Key words: early heat stress, broilers, growth and development, IGF-1 signal

中图分类号:

S831.4

刘迎生, 焦洪超, 林海, 王晓鹃. 早期热应激对肉仔鸡后期生长发育的影响[J]. 畜牧兽医学报, 2021, 52(7): 2052-2058.

LIU Yingsheng, JIAO Hongchao, LIN Hai, WANG Xiaojuan. Effect of Early Heat Stress on the Growth and Development of Broilers[J]. Acta Veterinaria et Zootechnica Sinica, 2021, 52(7): 2052-2058.

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早期热应激对肉仔鸡后期生长发育的影响

Effect of Early Heat Stress on the Growth and Development of Broilers

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