干旱区生态环境知识资源中心(Arid): Physiological and genetic adaptation of desert sheep and goats to heat stress in the arid areas of Egypt

Arid

DOI	10.1016/j.smallrumres.2021.106499
	Physiological and genetic adaptation of desert sheep and goats to heat stress in the arid areas of Egypt
	Naga, A. M. Aboul; Khalek, T. M. Abdel; Osman, Mona; Elbeltagy, A. R.; Abdel-Aal, E. S.; Abou-Ammo, F. F.; El-Shafie, M. H.
通讯作者	Naga, AMA (corresponding author)，Agr Res Ctr, Anim Prod Res Inst, Cairo, Egypt.
来源期刊	SMALL RUMINANT RESEARCH
ISSN	0921-4488
EISSN	1879-0941
出版年	2021
卷号	203
英文摘要	The study was carried out to investigate physiological and genetic adaptation of desert Barki sheep and goats to heat stress at the hot dry areas of Egypt. Two hundreds and ninety one mature ewes, and 166 mature does were involved in the study, over the period from 2008 2012. The animals were exposed to: zero stress (at Rest), summer heat stress (SHS); and physical exercise under heat stress (EHS, simulating summer grazing on poor pasture). Physiological parameters (thermal, respiratory and metabolic) were measured on the animals at Rest, and post exposure to heat stress. The animals utilized basically respiratory mechanism to maintain their homoeothermic, and tolerate heat stress. Accelerating panting, seems to be the main mechanism of desert sheep to tolerate SHS; however, with the extra energy required for physical exercise (EHS), they turn to deep breathing. Shallow rapid panting and decreased metabolic rate, were the main mechanisms of desert goats to tolerate heat stressors. Desert goats showed generally, better tolerance to heat stressors than desert sheep. Both Barki sheep and goats showed detectable individual variations in their response to heat stress. No single physiological parameter was reliable enough to identify high or low tolerant animals to heat stress. Animal heat tolerant index was developed, based on changes in RT, RR, GV and MR; the index was successful in identifying HT animals, and to a reasonable extend LT ones. Relative quantitative analysis of 6 gene, involved in multiple pathways for wide variety of biochemical process include thermo-tolerance melanogenesis; showed variations in the level of gene expression between low tolerant (LT) and high tolerant (HT) animals. High tolerant animals showed, generally, higher gene expression than LT ones. Gene expression of number of genes, can be utilized for early identification of HT sheep and goats for breeding purposes.
英文关键词	Heat stress Desert sheep Desert goats Adaptation Physiological parameters Gene expression
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000754975200019
WOS关键词	CLIMATE-CHANGE ; FUTURE
WOS类目	Agriculture, Dairy & Animal Science
WOS研究方向	Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/375944
作者单位	[Naga, A. M. Aboul; Khalek, T. M. Abdel; Osman, Mona; Elbeltagy, A. R.; Abdel-Aal, E. S.; Abou-Ammo, F. F.; El-Shafie, M. H.] Agr Res Ctr, Anim Prod Res Inst, Cairo, Egypt
推荐引用方式 GB/T 7714	Naga, A. M. Aboul,Khalek, T. M. Abdel,Osman, Mona,et al. Physiological and genetic adaptation of desert sheep and goats to heat stress in the arid areas of Egypt[J],2021,203.
APA	Naga, A. M. Aboul.,Khalek, T. M. Abdel.,Osman, Mona.,Elbeltagy, A. R..,Abdel-Aal, E. S..,...&El-Shafie, M. H..(2021).Physiological and genetic adaptation of desert sheep and goats to heat stress in the arid areas of Egypt.SMALL RUMINANT RESEARCH,203.
MLA	Naga, A. M. Aboul,et al."Physiological and genetic adaptation of desert sheep and goats to heat stress in the arid areas of Egypt".SMALL RUMINANT RESEARCH 203(2021).