Patterns of heat tolerance in different sheep breeds in Brazil

McManus, Concepta; Dallago, Bruno Stéfano Lima; Lehugeur, Carla Menger; Ribeiro, Luiz Alberto Oliveira; Hermuche, Potira Meirelles; Guimarães, Renato Fontes; Júnior, Osmar Abı́lio de Carvalho; Paiva, Samuel Rezende

doi:10.1016/j.smallrumres.2016.10.004

Cited by 33 publications

(10 citation statements)

References 21 publications

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“…Heat resistance is usually measured in view of the respiratory rate and rectal temperature [9]. Based on the air temperature, relative humidity, respiration rate and temperature-humidity index, heat-tolerant models of 11 different breeds of sheep in Brazil have been examined [10]. At present, studies on sheep heat stress mainly focus on physiology, behavior and production.…”

Section: Introductionmentioning

confidence: 99%

Heat Stress-Responsive Transcriptome Analysis in the Liver Tissue of Hu Sheep

Kong

Deng

et al. 2019

Genes

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Heat stress has a severe effect on animal health and can reduce the productivity and reproductive efficiency; it is therefore necessary to explore the molecular mechanism involved in heat stress response, which is helpful for the cultivation of an animal breed with resistance to heat stress. However, little research about heat stress-responsive molecular analysis has been reported in sheep. Therefore, in this study, RNA sequencing (RNA-Seq) was used to investigate the transcriptome profiling in the liver of Hu sheep with and without heat stress. In total, we detected 520 and 22 differentially expressed mRNAs and lncRNAs, respectively. The differentially expressed mRNAs were mainly associated with metabolic processes, the regulation of biosynthetic processes, and the regulation of glucocorticoid; additionally, they were significantly enriched in the heat stress related pathways, including the carbon metabolism, the PPAR signaling pathway, and vitamin digestion and absorption. The co-located differentially expressed lncRNA Lnc_001782 might positively influence the expression of the corresponding genes APOA4 and APOA5, exerting co-regulative effects on the liver function. Thus, we made the hypothesis that Lnc_001782, APOA4 and APOA5 might function synergistically to regulate the anti-heat stress ability in Hu sheep. This study provides a catalog of Hu sheep liver mRNAs and lncRNAs, and will contribute to a better understanding of the molecular mechanism underlying heat stress responses.

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Section: Introductionmentioning

confidence: 99%

Heat Stress-Responsive Transcriptome Analysis in the Liver Tissue of Hu Sheep

Kong

Deng

et al. 2019

Genes

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“…RR before heat exposure in current research classified no stress. McManus et al (2016) stated that according to RR, there was heat stress level classification, no stress: up to 40 breath per minutes, low stress: 40 -60; middle stress: 61 -80; high stress: 81 -120, very high stress: 121 -193, and severe heat stress: more than 193 breath per minutes. Increasing RR showed that animals endeavor to the maintenance of normal body temperature in a way increasing heat exhausting through breath evaporation (Shaji et al, 2017).…”

Section: Discussionmentioning

confidence: 99%

The effects of shearing and ascorbyl palmitate administration on physiological and blood metabolite profile of Padjadjaran sheep under heat exposure treatment

Taofik

Bandiati

Maskoen

et al. 2021

J. Indonesian Trop. Anim. Agric.

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Ascorbyl-6-palmitate (AP) was a lipid-soluble synthetic ester of ascorbic acid that has been used as a preservation agent for foods and as an antioxidant in cosmetics and related products. This study aims to investigate the effect of shearing management and ascorbyl palmitate administration on physiological and hematological profiles in under heat load Padjadjaran sheep. The physiological profile involves respiration rate (RR), Pulse rate (PR), and rectal temperature (RT). Twenty rams Padjadjaran 1 – 1,5 year-old, weighing between 25 to 47.5 kg used from sheep breeding station Purwakarta, West Java - Indonesia. There are two treatments level in this research, (1). Shearing divide into two groups, unshearing (c0) and shearing (c1); (2). AP administration also divides two groups, not given (a0) and given 400 mg each head daily (a1). The whole treatments were a0c0, a0c1, a1c0 and a1c1. Heat exposure application was exposed to sunlight when the sheep exposed, the animal tethered by rope at the neck region. The sheep exposed to the sun when the ambient temperature at least 34oC, 180 minutes each day, three days a week. The result showed that AP administration and shearing have interaction effects on RR, PR and RT. The level of glucose and total protein is affected by interaction effect of AP administration and shearing, while cholesterol affected to shearing. The conclusion, supplementing AP and shearing application could reduce the negative impact of heat stress on physiological and blood metabolite profiles of Padjadjaran sheep. Although the wool of local breed has not economic value, the shearing is regularly needed.

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“…In sheep and goats, there are genetic differences in heat stress adaptations and, consequently, tolerance to high temperatures [21,22], which are mediated through a complex network of genes [23,24]. In general, local breeds of small ruminants (or their crosses) are considered to have better tolerance to local climate conditions (including temperature) than imported breeds, with relevant results also reported from various regions globally, e.g., Africa [25], Brazil [26] and India [27]. One may thus postulate that in small ruminants, adaptations to locally prevailing temperatures shaped the spatial distribution of some gene variants, which might have underpinned adaptive variation [28].…”

Section: Climatic Conditions In the Locations Of Small Ruminant Farmsmentioning

confidence: 99%

Long-Term Climatic Changes in Small Ruminant Farms in Greece and Potential Associations with Animal Health

et al. 2022

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The objectives of this work were (a) to present the changes in climatic parameters from 1989 to 2019, in 444 locations throughout Greece, where small ruminant farms have been based and (b) to present associations of the changes in the climatic parameters with clinical data related to small ruminant health. Climatic variables (1989–2019) were obtained for 444 locations with small ruminant farms throughout Greece. During this period, significant increases were noted in temperature-related parameters (annually 0.05 °C for average temperature and 0.14 °C for temperature range) and precipitation (annually 0.03 mm). There were significant differences in climatic conditions between locations of farms in accord with the management system applied therein, as well as in accord with the breed of animals on the farms (e.g., higher average temperature in locations with Greek breeds, higher temperature range in locations with imported breeds). There were significant associations of temperature-related parameters with the annual frequency of cases of neonatal hypothermia seen at a veterinary teaching hospital, as well as with the average proportion of Haemonchus contortus larvae in faecal samples and the frequency of cases of H. contortus resistance reported by a veterinary parasitology laboratory.

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Patterns of heat tolerance in different sheep breeds in Brazil

Cited by 33 publications

References 21 publications

Heat Stress-Responsive Transcriptome Analysis in the Liver Tissue of Hu Sheep

Heat Stress-Responsive Transcriptome Analysis in the Liver Tissue of Hu Sheep

The effects of shearing and ascorbyl palmitate administration on physiological and blood metabolite profile of Padjadjaran sheep under heat exposure treatment

Long-Term Climatic Changes in Small Ruminant Farms in Greece and Potential Associations with Animal Health

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