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Onagbesan OM, Uyanga VA, Oso O, Tona K, Oke OE. Alleviating heat stress effects in poultry: updates on methods and mechanisms of actions. Front Vet Sci 2023; 10:1255520. [PMID: 37841463 PMCID: PMC10569619 DOI: 10.3389/fvets.2023.1255520] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Accepted: 09/08/2023] [Indexed: 10/17/2023] Open
Abstract
Heat stress is a threat that can lead to significant financial losses in the production of poultry in the world's tropical and arid regions. The degree of heat stress (mild, moderate, severe) experienced by poultry depends mainly on thermal radiation, humidity, the animal's thermoregulatory ability, metabolic rate, age, intensity, and duration of the heat stress. Contemporary commercial broiler chickens have a rapid metabolism, which makes them produce higher heat and be prone to heat stress. The negative effect of heat stress on poultry birds' physiology, health, production, welfare, and behaviors are reviewed in detail in this work. The appropriate mitigation strategies for heat stress in poultry are equally explored in this review. Interestingly, each of these strategies finds its applicability at different stages of a poultry's lifecycle. For instance, gene mapping prior to breeding and genetic selection during breeding are promising tools for developing heat-resistant breeds. Thermal conditioning during embryonic development or early life enhances the ability of birds to tolerate heat during their adult life. Nutritional management such as dietary manipulations, nighttime feeding, and wet feeding often, applied with timely and effective correction of environmental conditions have been proven to ameliorate the effect of heat stress in chicks and adult birds. As long as the climatic crises persist, heat stress may continue to require considerable attention; thus, it is imperative to explore the current happenings and pay attention to the future trajectory of heat stress effects on poultry production.
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Affiliation(s)
| | | | - Oluwadamilola Oso
- Centre of Excellence in Avian Sciences, University of Lome, Lomé, Togo
| | - Kokou Tona
- Centre of Excellence in Avian Sciences, University of Lome, Lomé, Togo
| | - Oyegunle Emmanuel Oke
- Department of Animal Physiology, Federal University of Agriculture, Abeokuta, Nigeria
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2
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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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3
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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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4
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Khan RU, Naz S, Ullah H, Ullah Q, Laudadio V, Qudratullah, Bozzo G, Tufarelli V. Physiological dynamics in broiler chickens under heat stress and possible mitigation strategies. Anim Biotechnol 2021; 34:438-447. [PMID: 34473603 DOI: 10.1080/10495398.2021.1972005] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
High ambient temperature has emerged as a major constraint for the future development of the poultry industry, especially in the tropics and subtropics. The scarcity of resources coupled with harsh environmental conditions is the most crucial predicaments in the way to rationalize optimum production of broiler. Heat stress disturbs the physiological biochemistry of the broiler which ultimately reduces feed intake and feed efficiency which ultimately results in reduced performance and productivity. Under hot environmental conditions, feed utilization is disturbed by the deposition of fat and oxidative stress. In addition, changes in blood cells, acid-base balance, immune response, liver health, and antioxidant status are some of the major dynamics altered by heat stress. The broilers have a narrow range of temperatures to withstand heat stress. In this review, we have discussed the various physicochemical changes during heat stress, their possible mechanisms, and mitigation strategies to reduce heat stress.
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Affiliation(s)
- Rifat Ullah Khan
- College of Veterinary Sciences, Faculty of Animal Husbandry and Veterinary Sciences, The University of Agriculture, Peshawar, Pakistan
| | - Shabana Naz
- Department of Zoology, Government College University, Faisalabad, Pakistan
| | - Hammad Ullah
- College of Veterinary Sciences and Animal Husbandry, Abdul Wali Khan University Mardan, Mardan, Pakistan
| | - Qudrat Ullah
- Department of Clinical Sciences, Faculty of Veterinary and Animal Sciences, Gomal University, Dera Ismail Khan, Pakistan
| | - Vito Laudadio
- Department of DETO, Section of Veterinary Science and Animal Production, University of Bari 'Aldo Moro', Valenzano, Bari, Italy
| | - Qudratullah
- Department of Surgery and Pet Centre, Cholistan University of Veterinary and Animal Sciences, Bahawalpur, Pakistan
| | - Giancarlo Bozzo
- Department of Veterinary Medicine, University of Bari 'Aldo Moro', Bari, Italy
| | - Vincenzo Tufarelli
- Department of DETO, Section of Veterinary Science and Animal Production, University of Bari 'Aldo Moro', Valenzano, Bari, Italy
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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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Perini F, Cendron F, Rovelli G, Castellini C, Cassandro M, Lasagna E. Emerging Genetic Tools to Investigate Molecular Pathways Related to Heat Stress in Chickens: A Review. Animals (Basel) 2020; 11:ani11010046. [PMID: 33383690 PMCID: PMC7823582 DOI: 10.3390/ani11010046] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 12/21/2020] [Accepted: 12/24/2020] [Indexed: 12/13/2022] Open
Abstract
Simple Summary New genomic tools have been used as an instrument in order to assess the molecular pathway involved in heat stress resistance. Local chicken breeds have a better attitude to face heat stress. This review aims to summarize studies linked to chickens, heat stress, and heat shock protein. Abstract Chicken products are the most consumed animal-sourced foods at a global level across greatly diverse cultures, traditions, and religions. The consumption of chicken meat has increased rapidly in the past few decades and chicken meat is the main animal protein source in developing countries. Heat stress is one of the environmental factors which decreases the productive performance of poultry and meat quality. Heat stress produces the over-expression of heat shock factors and heat shock proteins in chicken tissues. Heat shock proteins regulate several molecular pathways in cells in response to stress conditions, changing the homeostasis of cells and tissues. These changes can affect the physiology of the tissue and hence the production ability of chickens. Indeed, commercial chicken strains can reach a high production level, but their body metabolism, being comparatively accelerated, has poor thermoregulation. In contrast, native backyard chickens are more adapted to the environments in which they live, with a robustness that allows them to survive and reproduce constantly. In the past few years, new molecular tools have been developed, such as RNA-Seq, Single Nucleotide Polymorphisms (SNPs), and bioinformatics approaches such as Genome-Wide Association Study (GWAS). Based on these genetic tools, many studies have detected the main pathways involved in cellular response mechanisms. In this context, it is necessary to clarify all the genetic and molecular mechanisms involved in heat stress response. Hence, this paper aims to review the ability of the new generation of genetic tools to clarify the molecular pathways associated with heat stress in chickens, offering new perspectives for the use of these findings in the animal breeding field.
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Affiliation(s)
- Francesco Perini
- Department of Agricultural, Food and Environmental Sciences, University of Perugia, Borgo XX Giugno, 74, 06121 Perugia (PG), Italy; (F.P.); (G.R.); (C.C.); (E.L.)
| | - Filippo Cendron
- Department of Agronomy, Food, Natural Resources, Animals and Environment, University of Padova, Viale dell’Università, 16, 35020 Legnaro (PD), Italy;
- Correspondence:
| | - Giacomo Rovelli
- Department of Agricultural, Food and Environmental Sciences, University of Perugia, Borgo XX Giugno, 74, 06121 Perugia (PG), Italy; (F.P.); (G.R.); (C.C.); (E.L.)
| | - Cesare Castellini
- Department of Agricultural, Food and Environmental Sciences, University of Perugia, Borgo XX Giugno, 74, 06121 Perugia (PG), Italy; (F.P.); (G.R.); (C.C.); (E.L.)
| | - Martino Cassandro
- Department of Agronomy, Food, Natural Resources, Animals and Environment, University of Padova, Viale dell’Università, 16, 35020 Legnaro (PD), Italy;
| | - Emiliano Lasagna
- Department of Agricultural, Food and Environmental Sciences, University of Perugia, Borgo XX Giugno, 74, 06121 Perugia (PG), Italy; (F.P.); (G.R.); (C.C.); (E.L.)
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RAJKUMAR U, PRINCE LLL, HAUNSHI S, PASWAN C, REDDY BLN. Evaluation of Vanaraja female line chicken for growth, production, carcass and egg quality traits. THE INDIAN JOURNAL OF ANIMAL SCIENCES 2020. [DOI: 10.56093/ijans.v90i4.104212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Vanaraja female line (PD-2) chicken was evaluated for growth, production, carcass and egg quality traits utilizing the data generated from 3,737 chicks and 599 hens produced in pedigreed mating with 50 sires and 250 dams at ICAR-Directorate of Poultry Research, Hyderabad, Telangana. Fertility was 86.63% and the hatchability was 86.72% on fertile egg set and 72.53% on total egg set basis in PD-2 line. The least squares means (LSM) for six week body weight and shank length were 662.38±2.54 g and 71.48±0.12 mm, respectively. Sex had significant influence on live weight, thigh and wing proportions wherein cocks had heavier and stronger legs and wings. Abdominal fat was significantly higher in females. The egg production up to 40 and 52 weeks of age was 80.29±0.03 and 133.16±0.05 eggs, respectively. The egg mass up to 52 weeks of age was 7447.41±2.98 g in PD-2 line. The heritability was low up to 15% for egg production and 17% for egg mass, the primary trait of selection in PD-2 line. Egg mass and egg weights at different ages had positive association as larger and high number of eggs contributed more to the egg mass. The egg mass and egg production had a significant positive association in PD-2 line. The egg quality was reasonably fair with average shape index of 75.22 and Haugh unit of 79.0±0.62. The albumen, yolk and shell weights were 30.20±0.14, 15.8±0.09, 0.40±0.02 g, respectively. The proportion of heritability and the magnitude of association between the important traits provide requisite information for implementing the breeding program for improvement of egg production in PD-2 line.
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Impact of Heat Stress on Poultry Health and Performances, and Potential Mitigation Strategies. Animals (Basel) 2020; 10:ani10081266. [PMID: 32722335 PMCID: PMC7460371 DOI: 10.3390/ani10081266] [Citation(s) in RCA: 116] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 07/23/2020] [Accepted: 07/23/2020] [Indexed: 12/22/2022] Open
Abstract
Heat stress is one of the major environmental stressors in the poultry industry resulting in substantial economic loss. Heat stress causes several physiological changes, such as oxidative stress, acid-base imbalance, and suppressed immunocompetence, which leads to increased mortality and reduced feed efficiency, body weight, feed intake, and egg production, and also affects meat and egg quality. Several strategies, with a variable degree of effectiveness, have been implemented to attenuate heat stress in poultry. Nutritional strategies, such as restricting the feed, wet or dual feeding, adding fat in diets, supplementing vitamins, minerals, osmolytes, and phytochemicals, have been widely studied and found to reduce the deleterious effects of heat stress. Furthermore, the use of naked neck (Na) and frizzle (F) genes in certain breed lines have also gained massive attention in recent times. However, only a few of these strategies have been widely used in the poultry industry. Therefore, developing heat-tolerant breed lines along with proper management and nutritional approach needs to be considered for solving this problem. Thus, this review highlights the scientific evidence regarding the effects of heat stress on poultry health and performances, and potential mitigation strategies against heat stress in broiler chickens and laying hens.
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RAO SVRAMA, RAJKUMAR U, RAJU MVLN, PRAKASH B. Performance, slaughter and serum biochemical variables of Vanaraja chicks in intensive farming system fed under different nutrient regimes. THE INDIAN JOURNAL OF ANIMAL SCIENCES 2018. [DOI: 10.56093/ijans.v88i5.79976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
An experiment was conducted to study the performance of Vanaraja under intensive farming system with different nutrient regimes, i.e. Vanaraja standard (VSD), layer chick (LCD), layer grower (LGD) and broiler starter diet (BSD) up to 12 weeks of age. Dietary nutrient regimes significantly influenced the body weight gain (BWG), feed intake (FI) and feed conversion ratio (FCR) up to 6 weeks of age. The BWG was significantly higher in groups fed BSD and LCD compared to those fed LGD during the initial 6 weeks of age. The BWG was significantly higher in Vanaraja birds fed BSD and LCD compared to other two groups at 7th week. The growth of birds fed VSD was significantly higher than those fed LGD. At the end of 12 weeks of age, BWG of birds was not affected due to dietary regimens. There was no significant variation in serum biological variables (total protein, albumin, globulin, cholesterol and triglycerides) at 6th and 12th week among the groups fed different dietary regimens. Relative weights of ready to cook yield, liver, abdominal fat and giblet were not affected with variation in nutrient regimen in diet. The Vanaraja birds gained uniform body weight without affecting slaughter variables at 12 weeks of age on diets containing diversified nutrient regime. The study concluded that Vanaraja birds can perform optimally with low nutrient diets resulting in reduced feed cost per unit weight gain.
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Mutibvu T, Chimonyo M, Halimani TE. Effects of strain and sex on the behaviour of free-range slow-growing chickens raised in a hot environment. JOURNAL OF APPLIED ANIMAL RESEARCH 2018. [DOI: 10.1080/09712119.2017.1287079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Tonderai Mutibvu
- Animal and Poultry Science, School of Agricultural, Earth and Environmental Sciences, University of KwaZulu-Natal, Pietermaritzburg, South Africa
| | - Michael Chimonyo
- Animal and Poultry Science, School of Agricultural, Earth and Environmental Sciences, University of KwaZulu-Natal, Pietermaritzburg, South Africa
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Mutibvu T, Chimonyo M, Halimani TE. Physiological Responses of Slow-Growing Chickens under Diurnally Cycling Temperature in a Hot Environment. ACTA ACUST UNITED AC 2017. [DOI: 10.1590/1806-9061-2017-0485] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- T Mutibvu
- University of KwaZulu-Natal, South Africa
| | - M Chimonyo
- University of KwaZulu-Natal, South Africa
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12
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Rajkumar U, Vinoth A, Shanmugam M, Rajaravindra KS, Rama Rao SV. Effect of Embryonic Thermal Exposure on Heat Shock Proteins (HSPs) Gene Expression and Serum T3 Concentration in Two Broiler Populations. Anim Biotechnol 2016; 26:260-7. [PMID: 26158456 DOI: 10.1080/10495398.2015.1022183] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The present experiment was conducted to evaluate the Hsp-70, 27 and Ubiquitin mRNA expressions and serum T3 concentration in synthetic colored broiler female lines, Punjab Broiler-2 (PB-2), and Naked neck (NN) broiler chicken whose eggs were exposed to 2°C increased incubation temperature for 3 hours each on the 16th, 17 th, and 18th day of incubation. Another set of eggs were incubated at normal conditions that were utilized as the control. A total of 432 chicks, 216 from each breed (PB-2; NN) and treatment (Heat exposed: HE; normal: N), were randomly distributed and reared at high ambient temperatures (32°C-45°C) during the summer season in battery brooders. Birds were sacrificed at 0 and the 28th day post hatch and different tissues (heart, liver, muscle, spleen, and bursa) were collected to study Hsps and ubiquitin mRNA expression. There was no difference between the breeds and age of slaughter in Hsp-70 mRNA expression. The Hsp(70, 27, and ubiquitin) mRNA expression was significantly (P≤0.001) lower in HE birds than that of N birds in PB-2 chickens. Nonsignificant variation was observed in NN chicken. The Hsp-70 mRNA expression was highest in bursa and lowest in muscle and liver. Serum T3 concentration was similar in both HE and N birds. The study concludes that exposure to increased temperature during incubation results in reduced expressions of Hsp mRNA in almost all tissues indicating better thermotolerance of the HE birds.
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Affiliation(s)
- U Rajkumar
- a Directorate of Poultry Research , Hyderabad , Telangana , India
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13
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Naked neck and frizzle genes for improving chickens raised under high ambient temperature: II. Blood parameters and immunity. WORLD POULTRY SCI J 2014. [DOI: 10.1017/s0043933914000142] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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14
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Rajkumar U, Sharma RP, Padhi MK, Rajaravindra KS, Reddy BLN, Niranjan M, Bhattacharya TK, Haunshi S, Chatterjee RN. Genetic analysis of juvenile growth and carcass traits in a full diallel mating in selected colored broiler lines. Trop Anim Health Prod 2011; 43:1129-36. [PMID: 21360012 DOI: 10.1007/s11250-011-9812-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/17/2011] [Indexed: 10/18/2022]
Abstract
The juvenile growth and carcass traits were evaluated in a 4 × 4 full diallel crossing involving four colored broiler chicken lines viz., Naked neck (NN), Dwarf, Punjab Broiler-1 (PB-1), and Punjab Broiler-2 to study the performance and crossbreeding parameters. The data on 2,280 chicks were analyzed using least squares techniques to assess the effect of genetic group, and the significant traits were further analyzed for crossbreeding parameters. Genetic group had significant influence on the body weights and carcass traits. The cross of PB-1 × NN recorded significantly (p ≤ 0.05) higher body weight at 6 weeks of age. The data revealed that general combining ability (GCA), specific combining ability (SCA), maternal ability (MA), sex-linked effect (SE), and purebred effects significantly influenced the growth and carcass traits in the broiler crosses. The crossbred PB-1 × NN showed positive heterosis for growth as well as carcass traits. The results suggest that GCA, SCA, SE, and MA are important in the inheritance of the body weights and carcass traits indicating the presence of both additive and nonadditive genetic variation along with reciprocal effects. Therefore, pure line selection along with development of specialized sire and dam lines followed by crossing will improve the growth performance and benefit the poultry farmers. It is concluded that PB-1 as a male line and NN as a female line performed significantly higher, therefore, may be used for improving the performance of colored broilers.
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Affiliation(s)
- Ullengala Rajkumar
- Project Directorate on Poultry, Rajendranagar, Hyderabad, 500 030, India.
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Ramasamy KT, Reddy MR, Raveendranathan DN, Murugesan S, Chatterjee RN, Ullengala R, Haunshi S. Differential expression of Toll-like receptor mRNA in White Leghorn and indigenous chicken of India. Vet Res Commun 2010; 34:633-9. [DOI: 10.1007/s11259-010-9431-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/21/2010] [Indexed: 10/19/2022]
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