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Fernandes E, Raymundo A, Martins LL, Lordelo M, de Almeida AM. The Naked Neck Gene in the Domestic Chicken: A Genetic Strategy to Mitigate the Impact of Heat Stress in Poultry Production—A Review. Animals (Basel) 2023; 13:ani13061007. [PMID: 36978548 PMCID: PMC10044606 DOI: 10.3390/ani13061007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 03/06/2023] [Accepted: 03/07/2023] [Indexed: 03/12/2023] Open
Abstract
The poultry sector is one of the most important food industries in the world. Poultry production generates high-value protein products (meat and eggs) that are produced efficiently without the need for large areas. In poultry production, especially in the tropics, environmental factors, such as temperature and humidity, play a major role. Heat stress (HS) causes behavioral, physical, and physiological changes in poultry, with severe financial impacts. Therefore, it is important to find strategies to minimize it. The naked neck (Na) is an autosomal, incompletely dominant gene. Compared with normal feathered birds, these animals are known for their ability to adapt, perform, and reproduce under hot and humid climate conditions. Due to the absence of feathers on the neck, these animals increase heat dissipation, alleviating adverse heat effects, especially on productive performance. Genetic improvement of heat tolerance may provide a low-cost solution, of particular interest for developing countries in the tropics. The focus of this review is to evaluate the impact of HS in poultry with a special emphasis on the advantages of using the Na gene.
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Fathi M, Abou-Emera O, Al-Homidan I, Galal A, Rayan G. Effect of genotype and egg weight on hatchability properties and embryonic mortality pattern of native chicken populations. Poult Sci 2022; 101:102129. [PMID: 36088821 PMCID: PMC9471450 DOI: 10.1016/j.psj.2022.102129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 08/02/2022] [Accepted: 08/04/2022] [Indexed: 10/31/2022] Open
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Fathi MM, Galal A, Radwan LM, Abou-Emera OK, Al-Homidan IH. Using major genes to mitigate the deleterious effects of heat stress in poultry: an updated review. Poult Sci 2022; 101:102157. [PMID: 36167017 PMCID: PMC9513277 DOI: 10.1016/j.psj.2022.102157] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Revised: 06/09/2022] [Accepted: 08/24/2022] [Indexed: 10/31/2022] Open
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Asumah C, Adomako K, Olympio OS, Hagan BA, Yeboah ED. Influence of thermoregulatory (Na & F) genes on performance and blood parameters of F 2 and F 3 generations of crosses of local and commercial chickens. Trop Anim Health Prod 2022; 54:207. [PMID: 35676547 DOI: 10.1007/s11250-022-03207-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Accepted: 06/01/2022] [Indexed: 10/18/2022]
Abstract
High ambient temperatures pose serious productive challenges to poultry farmers in the tropics with adverse consequences such as reduced egg production. A study was undertaken to assess the effect of naked neck (Na) and frizzle (F) genes on the performance of F2 and F3 generations of crosses of commercial and indigenous chickens in Ghana. One thousand, five hundred and sixty-five (1,565) eggs distributed in a randomized complete block design comprising 4 genotypes and 15 hatches were used for the first study. The eggs were produced from 33 each F2 crossbred normal-feathered (nanaff), naked neck (Na), frizzle (F) and both (Na and F) alleles carrying chickens to determine the effects of these genes on fertility and hatchability. Data were analysed using the mixed model procedure of GenStat statistical software. Eggs from birds with the heat-tolerant genes, either in the single or double doses, were significantly more fertile than those from birds without the genes. Eggs of birds carrying the F allele had significantly (P < 0.05) higher hatchability than eggs from birds carrying the Na allele.Subsequently, 199 F3 crossbred chickens obtained from six hatches generated by the F2 generation were used for the evaluation of growth, egg production, haematological and blood biochemical parameters. The genotypic groups were normal feathered (nanaff), homozygous naked neck (NaNaff), heterozygous naked neck (Nanaff), homozygous frizzle (nanaFF), heterozygous frizzle (nanaFf), double homozygous naked neck-frizzle (NaNaFF) and double heterozygous naked neck- frizzle (NanaFf). The Nanaff recorded a significantly (P < 0.05) heavier day-old body weight compared to all other genotypes except the NaNaff birds.The nanaff genotype reached sexual maturity significantly earlier than all other genotypes. Hen day egg production and egg weight were also significantly higher in nanaff birds compared to birds carrying either Na or F allele, or both alleles. All birds carrying the naked neck and frizzle genes had significantly higher packed cell volume (PCV) concentration than the nanaff genotype. The Nanaff genotype recorded a significantly higher blood haemoglobin concentration compared to the nanaff, nanaFf and NaNaFF ones. However, birds carrying the thermoregulatory genes recorded significantly (P < 0.05) higher haemoglobin values except for the heterozygous frizzle. The thermoregulatory genes are of importance in chicken populations in Ghana as they positively influence percentage fertility of chicken eggs and PCV concentrations of chicken blood.
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Affiliation(s)
- C Asumah
- Department of Animal Production and Health, School of Agriculture and Technology, University of Energy and Natural Resources, Dormaa Campus, Dormaa Ahenkro, Ghana
| | - K Adomako
- Department of Animal Science, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana.
| | - O S Olympio
- Department of Animal Science, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - B A Hagan
- Department of Animal Production and Health, School of Agriculture and Technology, University of Energy and Natural Resources, Dormaa Campus, Dormaa Ahenkro, Ghana
| | - E D Yeboah
- Department of Animal Production and Health, School of Agriculture and Technology, University of Energy and Natural Resources, Dormaa Campus, Dormaa Ahenkro, Ghana
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Shafiq M, Khan MT, Rehman MS, Raziq F, Bughio E, Farooq Z, Gondal MA, Rauf M, Liaqat S, Sarwar F, Azad A, Asad T, Arslan M, Azhar M, Kamal RMA, Shakir M. Assessing growth performance, morphometric traits, meat chemical composition and cholesterol content in four phenotypes of naked neck chicken. Poult Sci 2022; 101:101667. [PMID: 35131639 PMCID: PMC8883059 DOI: 10.1016/j.psj.2021.101667] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Revised: 12/07/2021] [Accepted: 12/09/2021] [Indexed: 11/18/2022] Open
Abstract
The present study was conducted to assess the growth performance, morphometric traits, muscle chemical composition and cholesterol content in four phenotypes of naked neck chicken (black, white-black, light brown and dark brown). A total of 320-day-old chicks, 80 from each phenotype, were randomly stratified into 20 replicates (16/replicate), according to a completely randomized design. The results showed higher final body weight, weight gain, and better FCR in both light brown and dark brown phenotypes whereas time of gains was found to be greater in dark brown phenotype. Keel length and shank circumference were greater in dark brown whereas wing spread was found to be higher in light brown phenotype. Drumstick circumference and body length did not show any significant differences (P > 0.05) across the phenotypes. Dry matter was found to be higher in white black, crude protein in black, white black and dark brown, moisture in light brown, and cholesterol content in black whereas ether extract and ash content were found to be greater in black and white black phenotypes. In conclusion, both light brown and dark brown phenotypes showed superior growth performance and morphometric traits. Similarly, from a health point of view, the dark brown and light brown phenotypes seem superior because their cholesterol content was low. Thus, it is strongly recommended that there should be a conscious effort to improve economically important traits of the light and dark brown birds to be used as dual-purpose slow growing chicken, especially in developing countries.
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Affiliation(s)
- M Shafiq
- Livestock and Dairy Development Department, Poultry Research Institute, Rawalpindi 46300, Pakistan
| | - M T Khan
- Department of Poultry Science, Faculty of Animal Production and Technology, Cholistan University of Veterinary and Animal Sciences, Bahawalpur 63100, Pakistan.
| | - M S Rehman
- Livestock and Dairy Development Department, Poultry Research Institute, Rawalpindi 46300, Pakistan
| | - F Raziq
- Department of Livestock and Dairy Development (Extension), KPK, Pakistan
| | - E Bughio
- Department of Poultry Production, Shaheed Benazir Bhutto University of Veterinary and Animal Sciences, Sakrand 67210, Pakistan
| | - Z Farooq
- Department of Zoology, Cholistan University of Veterinary and Animal Sciences, Bahawalpur 63100, Pakistan
| | - M A Gondal
- Institute of Continuing Education and Extension, Cholistan University of Veterinary and Animal Sciences, Bahawalpur 63100, Pakistan
| | - M Rauf
- Department of Pathology, Cholistan University of Veterinary and Animal Sciences, Bahawalpur 63100, Pakistan
| | - S Liaqat
- Faculty of Veterinary and Animal Sciences, The Islamia University of Bahawalpur 63100, Pakistan
| | - F Sarwar
- Livestock and Dairy Development Department, Poultry Research Institute, Rawalpindi 46300, Pakistan
| | - A Azad
- Livestock and Dairy Development Department, Poultry Research Institute, Rawalpindi 46300, Pakistan
| | - T Asad
- Department of Poultry Science, Faculty of Animal Production and Technology, Cholistan University of Veterinary and Animal Sciences, Bahawalpur 63100, Pakistan
| | - M Arslan
- Department of Poultry Science, Faculty of Animal Production and Technology, Cholistan University of Veterinary and Animal Sciences, Bahawalpur 63100, Pakistan
| | - M Azhar
- Department of Poultry Science, Faculty of Animal Production and Technology, Cholistan University of Veterinary and Animal Sciences, Bahawalpur 63100, Pakistan
| | - R M A Kamal
- Livestock and Dairy Development Department, Poultry Research Institute, Rawalpindi 46300, Pakistan
| | - M Shakir
- Livestock and Dairy Development Department, Poultry Research Institute, Rawalpindi 46300, Pakistan
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Santana TP, Gasparino E, de Souza Khatlab A, Brito CO, Barbosa LT, Lamont SJ, Del Vesco AP. Effect of prenatal ambient temperature on the performance physiological parameters, and oxidative metabolism of Japanese quail (Coturnix coturnix japonica) layers exposed to heat stress during growth. Sci Rep 2021; 11:9809. [PMID: 33963276 PMCID: PMC8105354 DOI: 10.1038/s41598-021-89306-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2020] [Accepted: 04/19/2021] [Indexed: 02/03/2023] Open
Abstract
A strategy to mitigate the negative effects of stress on animals is to enhance their ability to beneficially respond to stressful conditions. This study aimed to assess whether prenatal ambient temperature influences the response of Japanese quail (Coturnix coturnix japonica) chicks to environmental challenges during growth. The experiment was conducted in a 2 × 2 factorial arrangement: two temperature conditions for the mothers (thermoneutral and heat stress by continuous exposure to 32 °C) and two offspring ambient temperature conditions (thermoneutral and heat stress by intermittent exposure to 34 °C for 6 h/day from 15 to 35 days of age). Heat stress in mothers led to lower laying rate, egg mass, expression of methionine sulfoxide reductase A (MSRA) gene, and antioxidant capacity as well as higher chick mortality rate (1-15 days of age). Maternal heat stress led to lower weight gain and total antioxidant capacity and higher feed conversion ratio. Maternal temperature × Offspring temperature interaction effects were observed on carbonylated protein content and HSP70, GSS, and MSRA gene expression. It was observed that, for chicks hatched from heat-stressed mothers, exposure to heat stress led to higher carbonylated protein content and HSP70 expression than exposure to thermoneutral conditions. Maternal heat stress was also responsible for increasing GSS expression in chicks grown under thermoneutral conditions. Chicks hatched from non-stressed mothers and subjected to heat stress had higher MSRA expression compared to chicks maintained in a thermoneutral environment. Our results show that, although maternal heat stress had no negative effects on performance or oxidative metabolism of offspring grown under thermoneutral conditions, it was associated with lower performance and higher protein oxidation in offspring exposed to heat stress during growth. These results could be due in part to alterations in the expression of genes related to antioxidant capacity.
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Affiliation(s)
- Thaís Pacheco Santana
- grid.411252.10000 0001 2285 6801Department of Animal Science, Federal University of Sergipe, São Cristóvão, Brazil
| | - Eliane Gasparino
- grid.271762.70000 0001 2116 9989Department of Animal Science, State University of Maringá, Maringá, Brazil
| | - Angélica de Souza Khatlab
- grid.271762.70000 0001 2116 9989Department of Animal Science, State University of Maringá, Maringá, Brazil
| | - Claudson Oliveira Brito
- grid.411252.10000 0001 2285 6801Department of Animal Science, Federal University of Sergipe, São Cristóvão, Brazil
| | - Leandro Teixeira Barbosa
- grid.411252.10000 0001 2285 6801Department of Animal Science, Federal University of Sergipe, São Cristóvão, Brazil
| | - Susan J. Lamont
- grid.34421.300000 0004 1936 7312Department of Animal Science, Iowa State University, Ames, USA
| | - Ana Paula Del Vesco
- grid.411252.10000 0001 2285 6801Department of Animal Science, Federal University of Sergipe, São Cristóvão, Brazil
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Desta TT. The genetic basis and robustness of naked neck mutation in chicken. Trop Anim Health Prod 2021; 53:95. [PMID: 33415443 DOI: 10.1007/s11250-020-02505-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Accepted: 12/03/2020] [Indexed: 10/22/2022]
Abstract
Chicken is a homeothermic animal; consequently, regardless of fluctuation in weather conditions, it maintains constant body temperature. However, in hot regions and seasons, chickens suffer from heat stress. To dissipate excess heat, besides modifying the environment, which is costly, however, chickens with efficient heat dissipation capacity might be utilized. Naked neck chickens have a higher capacity for heat loss attributable to reduced feather mass. The naked neck mutation (Na) was originated from a large insertion (~ 180 bp) integrated ~ 260-kb downstream of a protein-coding gene-GDF7 (Growth Differentiation Factor 7). Na possesses a cis-regulatory function and upregulates the expression of GDF7-a gene that exhibits a tissue-specific effect by the sensitizing action of retinoic acid. Na suppresses the development of feathers in the neck and vent. Na shows autosomal incomplete dominance and regulates several developmental processes. Na usually segregates at low frequency, which might be attributed to limited socio-cultural preferences. Specifically, in hot and humid regions, although to a varying extent, Na enhances performance, immunocompetence, and resilience to disease both in the homozygous and heterozygous state. Occasionally, naked neck chickens (especially the homozygous ones) lose comparative advantage in cool environments. Homozygous Na also results in high embryo death and reduced hatchability and diminishes floating and flying capacity. Nevertheless, selective breeding of naked neck chickens for fertility traits enhances the performance and welfare of chickens in hot and humid regions. The comparative advantage of Na needs to be studied not only from a temperature perspective and under controlled experiment but also from humidity, body weight, feed intake (absolute and relative to body weight), age, agroecology insights, and under field condition. Due to the incomplete dominant expression pattern of Na, studies need to separately report their findings for homozygous and heterozygous naked neck chicken.
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Affiliation(s)
- Takele Taye Desta
- Department of Biology, College of Natural and Computational Science, Kotebe Metropolitan University, Addis Ababa, Ethiopia.
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Idowu PA, Zishiri O, Nephawe KA, Mtileni B. Current status and intervention of South Africa chicken production – A review. WORLD POULTRY SCI J 2021. [DOI: 10.1080/00439339.2020.1866965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- P. Ayodeji Idowu
- Department of Animal Sciences, Tshwane University of Technology, Pretoria, South Africa
| | - Oliver Zishiri
- Discipline of Genetics, School of Life Sciences, University of KwaZulu-Natal, Durban, South Africa
| | - K. Agree Nephawe
- Department of Animal Sciences, Tshwane University of Technology, Pretoria, South Africa
| | - Bohani Mtileni
- Department of Animal Sciences, Tshwane University of Technology, Pretoria, South Africa
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Naked neck and frizzle genes for improving chickens raised under high ambient temperature: I. Growth performance and egg production. WORLD POULTRY SCI J 2019. [DOI: 10.1017/s0043933913000834] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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10
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Characterisation of Saudi native chicken breeds: a case study of morphological and productive traits. WORLD POULTRY SCI J 2019. [DOI: 10.1017/s0043933917000563] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Adomako K, Olympio OS, Hagan JK, Hamidu JA. Growth performance of crossbred naked neck and normal feathered laying hens kept in tropical villages. Br Poult Sci 2015; 55:701-8. [PMID: 25192492 DOI: 10.1080/00071668.2014.960805] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
1. Two experiments were conducted to develop naked neck (Na/na) and normal feathered (na/na) crossbreds and compare their growth performance, linear body measurements and carcass characteristics in the first and second filial generations. 2. In the first experiment, 4 indigenous naked neck males (Na/na) were mated to 36 Lohmann commercial females (na/na) in a ratio of 1:9. The two genotypes (Na/na, na/na) were allocated randomly according to batches of hatch, sire lines and sex to three different villages. 3. In the second experiment, 10 males and 100 females of F1 Na/na birds were selected and mated inter se in a ratio of 1:10. The three genotypes (Na/Na, Na/na and na/na) were compared in a randomised complete block design experiment, with the three villages, hatch and sex as blocks and the three genotypes as treatments. F1 Na/na birds had significantly higher (P < 0.05) feed conversion ratio, body weight, body weight gain, linear body measurements, survivability and carcass yield than their na/na counterparts. 4. In the F2 generation, Na/Na and Na/na birds had significantly higher (P < 0.05) feed conversion ratio, body weight, body weight gain, linear body measurements, survivability and carcass yield compared to their na/na counterparts. 5. The birds showing the naked neck phenotype appeared to show superior performance compared to normal feathered birds and could be exploited for potential utilisation in local poultry production.
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Affiliation(s)
- K Adomako
- a Department of Animal Science , KNUST , Kumasi , Ghana
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Adomako K, Olympio OS, Hagan JK, Hamidu JA. Effect of the frizzle gene (F) on egg production and egg quality of laying hens kept in tropical villages. Br Poult Sci 2014; 55:709-14. [PMID: 25277785 DOI: 10.1080/00071668.2014.963026] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
1. Two experiments were conducted to determine the influence of the frizzle gene (F) on the production and quality of chicken eggs kept on village farms in Ghana. 2. In the first experiment, 144 pullets, 72 each of Ff and ff pullets from F1 birds, were compared in a randomised complete block design (RCBD), with three villages and 4 batches of hatch as blocks and the two feather genotypes (Ff and ff) as the treatments. 3. The Ff pullets were superior (P < 0.05) to their ff counterparts in terms of the number of eggs per clutch, egg mass and hen-housed and hen-d rates of lay, whereas age at first egg was lower (P < 0.05) in ff layers compared to Ff ones. 4. The eggs of the F1 heterozygous frizzle (Ff) layers had higher values for albumen height, Haugh unit and yolk height compared with eggs from their normal feathered counterparts. 5. In the second experiment, 144 pullets, 48 each of FF, Ff and ff pullets, were compared in a RCBD, with three villages and 4 batches of hatch as blocks and the two feather genotypes (Ff and ff) as the treatments. 6. The F2 birds with genotypes Ff and FF were better than their ff counterparts in terms of the number of eggs per clutch, egg mass, and hen-housed and hen-d rates of lay. Age at first egg was significantly lower in ff layers compared to FF and Ff ones. 7. The Haugh unit value was higher in the homozygous and heterozygous frizzles compared to the normal feathered ones. 8. The presence of the frizzle gene (F) in egg type chickens led to an improvement in egg production and egg quality traits in village chickens, and the cross-breeding scheme evaluated in this project could contribute to improved productivity.
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Affiliation(s)
- K Adomako
- a Department of Animal Science , KNUST , Kumasi , Ghana
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de Queiroz JPAF, de Souza JBF, de Lima HFF, de Oliveira Costa MK, de Macedo Costa LL, de Arruda AMV. Daily variations in the thermoregulatory behaviors of naked neck broilers in an equatorial semi-arid environment. INTERNATIONAL JOURNAL OF BIOMETEOROLOGY 2014; 58:1259-1264. [PMID: 23996545 DOI: 10.1007/s00484-013-0721-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2013] [Revised: 08/03/2013] [Accepted: 08/07/2013] [Indexed: 06/02/2023]
Abstract
The aim of this study was to evaluate the daily variations in the thermoregulatory behavior of 4- to 6-week-old naked neck broilers (Label Rouge) in an equatorial semi-arid environment. A total of 220 birds were monitored for 5 days starting at 0600 hours and ending at 1800 hours. The period of observation was divided into classes of hours (C H). The observed behaviors were as follows: feed and water intake, wing-spreading, sitting or lying, and beak-opening. A total of 14,300 behavioral data values were registered. In C H 2 (0900 hours to 1100 hours) and 3 (1200 hours to 1500 hours), the greatest average body surface temperature was recorded (34.67 ± 0.25 °C and 35.12 ± 0.22 °C, respectively). The C H had an effect on the exhibition of all behaviors with the exception of the water intake behavior. Feed intake was more frequent in C H 1 (0600 hours to 0800 hours) and 4 (1600 hours to 1800 hours). In C H 2 and 3, the highest frequency of sitting or lying behavior was observed. Beak-opening and wing-spreading behaviors occurred more frequently in C H 3 where the body surface temperature (35.12 ± 0.22 °C), radiant heat load (519.38 ± 2.22 W m(-2)), and enthalpy (82.74 ± 0.36 kJ kg(-1) of dry air) reached maximum recorded averages. Thus, it can be concluded that naked neck broilers adjust their behavior in response to daily variations in the thermal environment. Wing-spreading and beak-opening behaviors are important adaptive responses to the thermal challenges posed by the equatorial semi-arid environment.
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Differential expression of heat shock transcription factors and heat shock proteins after acute and chronic heat stress in laying chickens (Gallus gallus). PLoS One 2014; 9:e102204. [PMID: 25072282 PMCID: PMC4114549 DOI: 10.1371/journal.pone.0102204] [Citation(s) in RCA: 92] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Accepted: 06/17/2014] [Indexed: 12/23/2022] Open
Abstract
Heat stress due to high environmental temperature negatively influences animal performances. To better understand the biological impact of heat stress, laying broiler breeder chickens were subjected either to acute (step-wisely increasing temperature from 21 to 35°C within 24 hours) or chronic (32°C for 8 weeks) high temperature exposure. High temperature challenges significantly elevated body temperature of experimental birds (P<0.05). However, oxidation status of lipid and protein and expression of heat shock transcription factors (HSFs) and heat shock proteins (HSPs) 70 and 90 were differently affected by acute and chronic treatment. Tissue-specific responses to thermal challenge were also found among heart, liver and muscle. In the heart, acute heat challenge affected lipid oxidation (P = 0.05) and gene expression of all 4 HSF gene expression was upregulated (P<0.05). During chronic heat treatment, the HSP 70 mRNA level was increased (P<0.05) and HSP 90 mRNA (P<0.05) was decreased. In the liver, oxidation of protein was alleviated during acute heat challenge (P<0.05), however, gene expression HSF2, 3 and 4 and HSP 70 were highly induced (P<0.05). HSP90 expression was increased by chronic thermal treatment (P<0.05). In the muscle, both types of heat stress increased protein oxidation, but HSFs and HSPs gene expression remained unaltered. Only tendencies to increase were observed in HSP 70 (P = 0.052) and 90 (P = 0.054) gene expression after acute heat stress. The differential expressions of HSF and HSP genes in different tissues of laying broiler breeder chickens suggested that anti-heat stress mechanisms might be provoked more profoundly in the heart, by which the muscle was least protected during heat stress. In addition to HSP, HSFs gene expression could be used as a marker during acute heat stress.
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Daş G, Gauly M. Response to Ascaridia galli infection in growing chickens in relation to their body weight. Parasitol Res 2014; 113:1985-8. [DOI: 10.1007/s00436-014-3832-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Accepted: 02/21/2014] [Indexed: 11/29/2022]
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Mack L, Felver-Gant J, Dennis R, Cheng H. Genetic variations alter production and behavioral responses following heat stress in 2 strains of laying hens. Poult Sci 2013; 92:285-94. [DOI: 10.3382/ps.2012-02589] [Citation(s) in RCA: 142] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Sharifi A, Horst P, Simianer H. The effect of frizzle gene and dwarf gene on reproductive performance of broiler breeder dams under high and normal ambient temperatures. Poult Sci 2010; 89:2356-69. [DOI: 10.3382/ps.2010-00921] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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