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British Poultry Science

Jing Li, Zhiyong Zhao, Decai Xiang, Bin Zhang, Tiao Ning, Tiancai Duan, Jun Rao, Liuping Yang, Xingwang Zhang, Fang Xiong
Adipose differentiation related protein (ADFP), fatty acid transport protein 1 (FATP1), and apolipoprotein B (APOB) are suspected to play an important role in determining intramuscular fat and in overall meat quality. Yunnan's top six famous chicken breeds (the Daweishan Mini, Yanjin Black-bone, Chahua, Wuding, Wuliangshan Black-bone and Piao chicken) are known for the high quality of their meat, but little is known about their expression of these three genes. 3. The present study aimed to examine the ADFP, FATP1, and APOB genes in different tissues of these six breeds at different development stages...
July 13, 2018: British Poultry Science
A E Taylor, M R Bedford, S C Pace, H M Miller
1. The aim of this study was to evaluate the effects of phytase and xylanase and their interaction on laying hen performance, egg quality, phosphorus (P) digestibility, phytate breakdown, volatile fatty acid (VFA) production and peptide YY concentration. 2. Two hundred and forty hens were allocated to cages at 22 weeks of age based on a 3 × 2 arrangement with phytase (0, 300 or 1500 FTU/kg) and xylanase (0 or 12 000 BXU/kg) as factors. 3. Phytase increased hen-day production (P < 0.05), daily egg mass (P < 0...
July 10, 2018: British Poultry Science
Radka Hulankova, Gabriela Borilova, Fouad Ali Abdullah Abdullah, Hana Buchtova
1. The aim of this study was to assess the incidence of pathogens and the development of spoilage microflora in organic chicken meat originating from a small poultry slaughterhouse and stored for 14 days at 2°C aerobically (control) or in one of two modified atmosphere packaging systems (MAP1: 80% O2 , 20% CO2 and MAP2: 70% N2 , 30% CO2 ). 2. Campylobacter jejuni survived well during storage; and was found on the skin in 95% of samples (262/276). 3. In general, both the skin and meat samples showed a good initial microbiological quality with total viable counts of less than 3 log cfu/g in meat and approximately 5 log cfu/g on skin...
July 9, 2018: British Poultry Science
Maryam Aalaei, Ali Khatibjoo, Mojtaba Zaghari, Kamran Taherpour, Mohammad Akbari Gharaei, Mahdi Soltani
1. This study was conducted to investigate the effect of multi-strain probiotic (containing Lactobacillus acidophilus 2.5×107 cfu/g, Lactobacillus casei 2.5×107 cfu/g, Bifidobacterium thermophilum 2.5×107 cfu/g and Enterococcus faecium 2.5×107 cfu/g) and single-strain probiotic (Pediococcus acidilactici 1×1010 cfu/g) on broiler breeder performance and gastrointestinal health. 2. A completely randomised trial was conducted using 300 broiler breeder hens (Ross 308) aged51 weeks old which were randomly allocated to one of five dietary treatments with six replicates per treatment in a 10 week trial...
July 6, 2018: British Poultry Science
Sophie A Lee, Jenny Dunne, Erica Febery, Charles A Brearley, Toby Mottram, Michael R Bedford
The current study was conducted to evaluate the influence of high phytase doses and xylanase, individually and in combination, on performance, blood inositol and real-time gastric pH in broilers fed wheat-based diets. In a 42 d experiment, a total of 576 male Ross 308 broiler chicks were allocated to four dietary treatments. Treatments consisted of a 2 × 2 factorial arrangement, with 500 or 2500 FTU/kg phytase and 0 or 16000 BXU/kg xylanase, fed in two phases (starter 0-21; grower 21-42 d). Heidelberg pH capsules were administered to eight birds from each treatment group, pre and post diet phase change, with readings captured over a 5...
July 6, 2018: British Poultry Science
F de C Tavernari, L F Roza, D Surek, C Sordi, M L B da Silva, L F T Albino, M J Migliorini, D Paiano, M M Boiago
1. This work investigates the apparent metabolisable energy (AME and nitrogen-corrected, AMEn) and amino acid (AA) digestibility coefficients of the microalgae Spirulina platensis as an ingredient in broiler chicken diets. 2. One group of birds was fed with a basal control diet (BD), another was fed with a test diet (TD) composed of the BD with the addition of the microalgae at a proportion of 200 g/kg. AME and AMEn were assessed by total excreta collection and indigestibility analysis using acid-insoluble ash (AIA) as a marker...
July 4, 2018: British Poultry Science
M Torki, D Schokker, M Duijster-Lensing, M M Van Krimpen
1. An experiment was conducted to evaluate the effects of technical feed ingredients between 14 and 28 days of age on performance and health status of broilers (d14 - 35) fed diets with a high inclusion rate of rapeseed meal as a nutritional challenge. 2. A total of 1,008 one-day-old male Ross 308 chicks was distributed over 36 floor pens and allocated to one of six iso-caloric (AMEN 13 MJ/kg) growing diets (d15-28): a control and five test diets supplemented with quercetin (400 mg/kg), oat hulls (50 g/kg), β-glucan (100 mg/kg), lysozyme (40 mg/kg), or fish oil ω-3 fatty acids (40 g/kg), with six replicate pens per treatment...
July 3, 2018: British Poultry Science
H G Mao, H Y Cao, H H Liu, X Y Dong, N Y Xu, Z Z Yin
1. Adenylosuccinate lyase (ADSL) plays an important role in the synthesis of inosine monophosphate (IMP). In this trial, a total of 200 pigeons were sampled and slaughtered. Seven meat quality traits and eleven carcass traits were measured. DNA sequencing was used to detect nucleotide mutations, and associations between ADSL gene polymorphisms and meat quality and carcass traits were analysed. 2. Sequencing results showed that nine nucleotide mutations were found in the exons of the ADSL gene. All the mutations were synonymous except C13065G, which caused a change in amino acids (Ser to Arg)...
July 2, 2018: British Poultry Science
L Pardyak, A Kaminska, M Brzoskwinia, A Hejmej, M Kotula-Balak, J Jankowski, A Ciereszko, B Bilinska
1. To show hormonal differences between male turkeys with yellow semen syndrome (YSS) and white, normal semen (WNS), the expression of aromatase, oestrogen receptor α (ERα), and oestrogen receptor β (ERβ) as well as testosterone and oestradiol concentrations in YSS and WNS testes, epididymis, and ductus deferens were examined. 2. To measure gene expression levels of aromatase and oestrogen receptors (ERs), three complementary techniques (real-time PCR, Western blot, and immunohistochemistry) were used, whereas steroid hormone levels were determined radio-immunologically...
July 2, 2018: British Poultry Science
Lu Liu, Huanxian Cui, Maiqing Zheng, Guiping Zhao, Jie Wen
1. Lipid metabolism is an indispensable process in an organism, though little is known about the regulatory mechanisms of fat deposition in different types of adipose tissue. 2. The differentially expressed genes related to triglyceride (TG) metabolism between abdominal and intramuscular fat of Beijing-You chickens were investigated in this study. 3. TG content in abdominal fat (349.7 mg/g) was significantly higher (P<0.01) than in the breast and thigh (12.3 mg/g and 24.8 mg/g, respectively). 4. Using Agilent chicken gene expression profiling in adipose tissues between abdominal fat and muscle (breast and thigh), certain representative genes related to fatty acid metabolism, lipoprotein catabolism and esterification reactions were significantly up-regulated (P<0...
June 25, 2018: British Poultry Science
Jingjing Wang, Wenxiu Zhang, Kunfu Wang, Shuang Zhang, Xiao Han, Weijun Guan, Yuehui Ma
1. Over the past decade rapid advancement in isolation methods for identifying markers of the once elusive intestinal stem cell (ISC) populations have laid the foundation for unravelling their complex interrelationships during homeostasis. Study on ISC in avian intestinal tissue might play a pivotal foundation for further studies on the epithelial-to-mesenchymal transition (EMT) in gastrointestinal disease and cell-based therapy as well as intestinal tissue engineering. 2. The following experiment isolated a population of fibroblast-like, plastic adhering cells derived from chick embryo intestine, showing a strong self-renewing and proliferative ability, which was maintained in vitro up to passage 25...
June 19, 2018: British Poultry Science
R Jahanian, M Ashnagar
1. This study was conducted to investigate the effects of two lipotropic factors (choline and carnitine) on growth performance, oxidative stability of leg and breast muscles and carcass characteristics in broiler chickens fed diets differing in metabolisable energy (ME) levels. 2. A total of 540 one-d-old Ross 308 broiler chicks were allotted to 9 experimental diets, including three ME levels (control, or 0.42 or 0.84 MJ/kg higher ME) and three types of supplemental lipotropic factors (control, 1000 mg/kg of choline or 100 mg/kg of carnitine) as a 3 × 3 factorial arrangement of treatments...
June 14, 2018: British Poultry Science
F Huart, P Malumba, S Odjo, W Al-Izzi, F Béra, Y Beckers
1. This study assessed the impact of drying temperature (54, 90, and 130°C) and maize grain moisture content at harvest (36% and 29%) on in vitro digestibility, the growth performance and ileal digestibility of broiler chickens. 2. In contrast to the results from the in vitro digestibility, apparent ileal digestibility of starch and energy decreased when the drying temperature was raised from 54 to 130°C, and this effect was more pronounced in maize grain harvested at high initial moisture content (36%). Ileal protein digestibility of maize grain decreased significantly when dried at the intermediate temperature (90°C) and with a high harvest moisture content (36%)...
June 11, 2018: British Poultry Science
Michael R Bedford
Enzymes have been used commercially for nearly 40 years and save significant costs through sparing of expensive nutrients but the mechanism by which this is achieved is still debated. The research focussed on Non-Starch Polysaccharidase (NSPase) enzymes is used as an example of where greater progress could have been made if the details of the work had been described more fully and the analysis of the data generated had been broader in scope and more critical. Lack of standardisation of the details presented in the materials and methods has been identified as a significant barrier to meaningful retrospective analysis and thus limits advances in the understanding of the mode of action of these enzymes The identity of the enzyme employed and its activity is often lacking, and more importantly the purity is rarely disclosed...
June 7, 2018: British Poultry Science
Ilias Giannenas, Eleftherios Bonos, Ioannis Skoufos, Athina Tzora, Ioanna Stylianaki, Diamanto Lazari, Anastasios Tsinas, Efterpi Christaki, Panagiota Florou-Paneri
1. This feeding trial investigated the effects of herbal feed additives on performance of broiler chickens, jejunal and caecal microbiota, jejunal morphology, and meat chemical composition and oxidative stability during refrigerated storage. 2. In a 42 days trial, 320 one-day-old broiler chickens were randomly allocated to four groups with four replicate pens each containing 20 chicks. The control group was fed maize-soybean-based diets. The diets of the other three groups were supplemented with herbal feed additives: HRB1 with StresomixTM (0...
June 6, 2018: British Poultry Science
D H Kim, S M Han, M C Keum, S Lee, B K An, S-R Lee, K-W Lee
1. The present study was designed to evaluate purified bee venom (BV) as an alternative to antibiotics in broiler chickens. The experimental treatment diets were formulated by adding BV into a maize-soybean meal-based diet to give 0, 10, 50, 100, and 500 μg BV per kg of diet. 2. Dietary BV quadratically improved (P < 0.05) feed conversion ratio and increased body weight gain at 1-21 d as level in diet increased. Higher BV levels lowered relative weight of spleen (linear and quadratic, P < 0.05), bursa of Fabricius (quadratic, P < 0...
June 5, 2018: British Poultry Science
M Majdeddin, A Golian, H Kermanshahi, S De Smet, J Michiels
(1) Guanidinoacetic acid (GAA) is the single immediate endogenous precursor of creatine (Cr). It was hypothesised that dietary GAA would have different effects on performance and energy metabolites in breast muscle depending on the nutrient density (ND) of corn-soybean-based diets. (2) A total of 540 one-day-old male Ross 308 broilers were allocated to 9 dietary treatments with 6 replicates (10 birds each) in a 3 × 3 factorial arrangement with three levels of ND (low, 2800; medium, 2950 and high, 3100 kcal metabolizable energy (ME)/kg; and with the other nutrients being constant relative to ME) and supplemented with three levels of GAA (0, 0...
June 5, 2018: British Poultry Science
S V Rama Rao, M V L N Raju, B Prakash, U Rajkumar, T Srilatha, E P K Reddy
An experiment was conducted to study the effect of supplementing higher concentrations (100 vs. 110%) of critical amino acids (CAA) on performance (body weight gain - BWG, feed efficiency - FE), slaughter variables and nitrogen retention in broiler chicken (1-6 weeks of age) fed graded levels of toasted guar meal (TGM) as a protein source in diets. The TGM was included at five graded concentrations (0, 50, 100, 150and200 g/kg) in iso-caloric and iso-protein diets with either the recommended concentration (100%) of CAA (lysine, total sulphur amino acids, threonine, tryptophan and valine) or at 10% higher (110%) concentration...
June 1, 2018: British Poultry Science
S Huang, B Baurhoo, A Mustafa
1. This study was conducted to determine the effects of feeding an extruded flaxseed (EF) on layer performance, apparent total tract nutrient retention (ATTR) and egg yolk fatty acid concentrations. 2. Seventy-two White Leghorn laying hens (58-week-old; three per cage) were randomly allotted to one of four dietary treatments: 0%, 7.5%, 15.0% and 22.5% of EF-supplemented diets for 8 weeks. 3. Supplementation with EF had no effect on feed intake, egg production, feed conversion ratio and egg weight. Egg components (yolk, albumen and shell percentages) were similar among treatments, except that shell percentage was greater for layers fed 22...
June 1, 2018: British Poultry Science
S Wu, J Guo, L Zhu, J Yang, S Chen, X Yang
1. There has been substantial research focused on the roles of microRNAs (miRNAs) and Piwi-interacting RNAs (piRNAs) derived from mammalian spermatozoa; however, comparatively little is known about the role of spermatozoa-derived miRNAs and piRNAs within breeding cockerels' spermatozoa. 2. A small RNA library of cockerels' spermatozoa was constructed using Illumina high-throughput sequencing technology. Unique sequences with lengths of 18-26 nucleotides were mapped to miRBase 21.0 and unique sequences with lengths of 25-37 nucleotides were mapped to a piRNA database...
June 1, 2018: British Poultry Science
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