South African Journal of Animal Science最新文献_第3页

Solvent-extracted cashew nut meal as a dietary protein source for layer chicks 溶剂萃取腰果粉作为蛋鸡的日粮蛋白质来源

IF 0.8 4区农林科学

South African Journal of Animal Science Pub Date : 2024-02-15 DOI: 10.4314/sajas.v53i3.12

G.M.M. Coffi, Y. Yapi, T. Tiho, K. J. Alla, D. Soro, K. Koffi

{"title":"Solvent-extracted cashew nut meal as a dietary protein source for layer chicks","authors":"G.M.M. Coffi, Y. Yapi, T. Tiho, K. J. Alla, D. Soro, K. Koffi","doi":"10.4314/sajas.v53i3.12","DOIUrl":"https://doi.org/10.4314/sajas.v53i3.12","url":null,"abstract":"This study aimed to produce a low-fat cashew nut meal (CNM) containing less than 6% fat and assess its effect on layer chick growing performance and health status. The experiment used 225 one-day-old layer ISA Brown chicks with an average live weight of 27.38 ± 1.85 g, divided into 15 batches of 15 animals each. Five diets containing 0, 25, 50, 75, and 100% CNM as a replacement for soybean meal were tested. The test included three replicates of 15 chicks for each diet. The CNM was obtained after oil extraction using an automatic press followed by solvent extraction. The CNM contained 40.6% crude protein and 5.38% fat. Except for the chicks fed on the 100% CNM diet that had the worst growth performance parameters, those on the other diets had an average final live weight of 662.13 g and an average feed conversion ratio of 2.76. The highest average daily gain (15,07g/d) was observed in chicks on the 75% CNM diet. Hematological analyses showed no marked difference between the animal groups. Regarding the blood biochemical profile, the total cholesterol levels were similar in the chicks for all diets. High-density lipoprotein cholesterol levels were 1.4 times higher in the chicks fed on CNM-based diets compared to those fed a soybean meal-based diet. It was concluded that low-fat CNM could replace soybean meal by up to 75% in layer chick feed without negative effects on growth performance and health status.","PeriodicalId":21869,"journal":{"name":"South African Journal of Animal Science","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139835562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Estimating milk production and energy-use efficiency of pasture-grazed Holstein and Jersey cows using mathematical models 利用数学模型估算牧草放牧的荷斯坦奶牛和娟姗牛的产奶量和能量利用效率

IF 0.8 4区农林科学

South African Journal of Animal Science Pub Date : 2024-02-15 DOI: 10.4314/sajas.v53i3.01

N. Bangani, C. Muller, K. Dzama, C. Cruywagen, F. Nherera-Chokuda, V. Imbayarwo-Chikosi

{"title":"Estimating milk production and energy-use efficiency of pasture-grazed Holstein and Jersey cows using mathematical models","authors":"N. Bangani, C. Muller, K. Dzama, C. Cruywagen, F. Nherera-Chokuda, V. Imbayarwo-Chikosi","doi":"10.4314/sajas.v53i3.01","DOIUrl":"https://doi.org/10.4314/sajas.v53i3.01","url":null,"abstract":"The efficiency of feed use for milk production is critical for sustainable and profitable pasture-based dairy systems. The aim of this study was to estimate milk production and energy-use efficiencies of pasture-grazed Holstein and Jersey cows. Lactation records of 122 Holstein and 99 Jersey cows varying from parities 1 to 6 that were managed under similar feeding and environmental conditions were collected from 2005 to 2014. Feed intake and nutrient requirements of the cows were calculated using the National Research Council and the Cornell Net Carbohydrate and Protein System equations. Holsteins had a higher milk yield/kg dry matter intake (1.36±0.01 vs. 1.27±0.01 kg), whereas Jerseys had higher efficiencies in milk fat (52.4±0.3 vs. 58.4±0.4 g), milk protein (42.7±0.3 vs. 45.1±0.3 g), and energy-corrected milk (1.30±0.01 vs. 1.36±0.01 kg) per kg dry matter intake. Jersey cows also had a higher dry matter intake/kg body weight (3.13±0.02 vs. 3.51±0.02%). During transition and early lactation stages, Holstein and Jersey cows were in negative energy balance for 102.4±2.3 vs. 74.2±2.3 days, with the lowest energy reserves (-53.9 MJ vs. -39.7 MJ) reached at 22.3±0.9 vs. 24.6±0.9 days post-calving, respectively. Compared to Holsteins, Jersey cows used proportionally less net energy intake to produce 100 g milk fat (13.7±0.10 vs. 12.5±0.10), 100 g milk protein (16.7±0.14 vs.16.2±0.15) and a 1-kg energy-corrected milk (5.52±0.04 vs. 5.35±0.04), making them a better breed for pasture-based dairy systems as they possess more production and feed-use efficiency traits, which are desirable in pasture-based production systems.","PeriodicalId":21869,"journal":{"name":"South African Journal of Animal Science","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139774069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Estimating milk production and energy-use efficiency of pasture-grazed Holstein and Jersey cows using mathematical models 利用数学模型估算牧草放牧的荷斯坦奶牛和娟姗牛的产奶量和能量利用效率

IF 0.8 4区农林科学

South African Journal of Animal Science Pub Date : 2024-02-15 DOI: 10.4314/sajas.v53i3.01

N. Bangani, C. Muller, K. Dzama, C. Cruywagen, F. Nherera-Chokuda, V. Imbayarwo-Chikosi

{"title":"Estimating milk production and energy-use efficiency of pasture-grazed Holstein and Jersey cows using mathematical models","authors":"N. Bangani, C. Muller, K. Dzama, C. Cruywagen, F. Nherera-Chokuda, V. Imbayarwo-Chikosi","doi":"10.4314/sajas.v53i3.01","DOIUrl":"https://doi.org/10.4314/sajas.v53i3.01","url":null,"abstract":"The efficiency of feed use for milk production is critical for sustainable and profitable pasture-based dairy systems. The aim of this study was to estimate milk production and energy-use efficiencies of pasture-grazed Holstein and Jersey cows. Lactation records of 122 Holstein and 99 Jersey cows varying from parities 1 to 6 that were managed under similar feeding and environmental conditions were collected from 2005 to 2014. Feed intake and nutrient requirements of the cows were calculated using the National Research Council and the Cornell Net Carbohydrate and Protein System equations. Holsteins had a higher milk yield/kg dry matter intake (1.36±0.01 vs. 1.27±0.01 kg), whereas Jerseys had higher efficiencies in milk fat (52.4±0.3 vs. 58.4±0.4 g), milk protein (42.7±0.3 vs. 45.1±0.3 g), and energy-corrected milk (1.30±0.01 vs. 1.36±0.01 kg) per kg dry matter intake. Jersey cows also had a higher dry matter intake/kg body weight (3.13±0.02 vs. 3.51±0.02%). During transition and early lactation stages, Holstein and Jersey cows were in negative energy balance for 102.4±2.3 vs. 74.2±2.3 days, with the lowest energy reserves (-53.9 MJ vs. -39.7 MJ) reached at 22.3±0.9 vs. 24.6±0.9 days post-calving, respectively. Compared to Holsteins, Jersey cows used proportionally less net energy intake to produce 100 g milk fat (13.7±0.10 vs. 12.5±0.10), 100 g milk protein (16.7±0.14 vs.16.2±0.15) and a 1-kg energy-corrected milk (5.52±0.04 vs. 5.35±0.04), making them a better breed for pasture-based dairy systems as they possess more production and feed-use efficiency traits, which are desirable in pasture-based production systems.","PeriodicalId":21869,"journal":{"name":"South African Journal of Animal Science","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139833563","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of herbal extracts as alternatives to antibiotics in the first week of age on broiler performance, serum biochemistry, and intestinal morphology under commercial farm conditions 在商业化农场条件下，将草药提取物作为第一周龄抗生素的替代品对肉鸡生产性能、血清生化指标和肠道形态的影响

IF 0.8 4区农林科学

South African Journal of Animal Science Pub Date : 2024-02-15 DOI: 10.4314/sajas.v53i3.14

W. H. Hassan, M. M. Mustafa, R. H. Isa

{"title":"Effect of herbal extracts as alternatives to antibiotics in the first week of age on broiler performance, serum biochemistry, and intestinal morphology under commercial farm conditions","authors":"W. H. Hassan, M. M. Mustafa, R. H. Isa","doi":"10.4314/sajas.v53i3.14","DOIUrl":"https://doi.org/10.4314/sajas.v53i3.14","url":null,"abstract":"This study was performed to show the effect of two herbal extracts as alternatives to antibiotics in the first eight days of rearing on broiler performance, serum biochemistry, and the jejunum morphology of the broiler. A total of 264, one-day Ross 308 chicks were used. They were randomly distributed into four treatments including three replicates of each. T1 was the control (nothing in drinking water), T2 had antibiotics in the drinking water (1 g/L of Gentadox), T3 had ENTERIA in the drinking water (0.5ml/L), T4 had ICEN in the drinking water (0.5ml/L). These products were administered for the first eight consecutive days of rearing. In the first seven days, there was no substantial variation in performance found in all groups. From days 8–14, T3 markedly improved body weight gain (BWG). The feed conversion ratio (FCR), thyroid hormones, total protein, and globulin were substantially improved in T3 and T4. The edible internal organs and heart percentage was substantially increased in the herbal groups. All the jejunum histology parameters, except the crypt depth, were substantially increased in T3. The T3 recorded the best bodyweight uniformity and economic efficiency compared to other groups. Similarly, the yolk sac residual at days 4 and 7 was lower in this group compared to other groups. It can be concluded that herbal extracts can replace antibiotics in improving and enhancing general broiler performance.","PeriodicalId":21869,"journal":{"name":"South African Journal of Animal Science","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139835586","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of diet on ruminal methanogenic archaea composition and diversity in cashmere goats 日粮对羊绒山羊瘤胃产甲烷古细菌组成和多样性的影响

IF 0.8 4区农林科学

South African Journal of Animal Science Pub Date : 2024-02-15 DOI: 10.4314/sajas.v53i3.08

K. N. Li, Y. R. Wei, R. H. Na

{"title":"Effects of diet on ruminal methanogenic archaea composition and diversity in cashmere goats","authors":"K. N. Li, Y. R. Wei, R. H. Na","doi":"10.4314/sajas.v53i3.08","DOIUrl":"https://doi.org/10.4314/sajas.v53i3.08","url":null,"abstract":"Diet is the most direct way to affect the rumen microbial community. The objective of this study was to examine the effects of different diets on ruminal methanogen composition in cashmere goats. Twenty four cashmere goats were randomly divided into four groups that were fed alfalfa hay (AH), alfalfa hay plus concentrate (AHC), corn stalks (CS), and corn stalks plus concentrate (CSC). The concentration of ammonia N for the group fed AHC was substantially higher than in the other groups. The concentrations of total VFAs, acetate, and propionate in AH and AHC groups were higher than in the CS and CSC groups. The abundance of archaea was markedly different among different groups based on a high throughput sequencing method. The abundance of Candidatus_Methanomethylophilus was 21.28% in the AH group, which was higher than the other groups. Unclassified_c_Thermoplasmata was the dominant methanogen in the AH and AHC groups, with abundances of 48.09% and 44.97%, respectively; Methanobrevibacter was the dominant methanogen in the CS and CSC groups, with abundances of 41.22% and 20.73%, respectively. A positive correlation was identified between pH and Methanosphaera; a negative relationship was observed between acetate and Unclassified_o_Thermoplasmatales. In conclusion, the methanogen communities in cashmere goats varied on different diets. In the alfalfa hay based diets, the Methanomassiliicoccales affiliated groups were the dominant methanogens in the rumen of the goats. However, when fed the corn stalk based diets, Methanobrevibacter was the dominant methanogen in the rumen fluid. The results were related to dietary composition, especially crude protein content.","PeriodicalId":21869,"journal":{"name":"South African Journal of Animal Science","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139836254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Screening and preliminary analysis of differentially expressed genes in quail embryos for feather colour based on RNA-Sequencing 基于 RNA 序列筛选和初步分析鹌鹑胚胎中羽毛颜色的差异表达基因

IF 0.8 4区农林科学

South African Journal of Animal Science Pub Date : 2024-02-15 DOI: 10.4314/sajas.v53i3.06

Y. Q. Hu, X. H. Zhang, Y. Z. Pang, Y. Qi, Q. K. Wang, Y. W. Zhao, Z. W. Yuan, T. Wang, L. Huo, S. Ren

{"title":"Screening and preliminary analysis of differentially expressed genes in quail embryos for feather colour based on RNA-Sequencing","authors":"Y. Q. Hu, X. H. Zhang, Y. Z. Pang, Y. Qi, Q. K. Wang, Y. W. Zhao, Z. W. Yuan, T. Wang, L. Huo, S. Ren","doi":"10.4314/sajas.v53i3.06","DOIUrl":"https://doi.org/10.4314/sajas.v53i3.06","url":null,"abstract":"The purpose of this study was to use RNA-Sequencing (RNA-Seq) to screen differentially expressed genes (DEGs) and analyse transcriptomic data from embryonic skin tissues of maroon-feather and white-feather quails. The transcriptome of embryonic skin tissues from quails was sequenced using the Illumina HiSeqTM 2000 sequencing platform. A total of 2 512 DEGs were found. Of these, 550 DEGs were up-regulated and 1 562 DEGs were down-regulated in the skin tissues of white-feather quail embryos. Five hundred and ninety-seven DEGs were enriched and annotated into 50 entries in Gene Ontology (GO) database. The total number of DEGs annotated in each entry in the Kyoto Encyclopedia of Genes and Genomes (KEGG) database was 341, enriched in 230 pathways, of which the tight junction pathway and neuroactive ligand-receptor interaction were the most significantly enriched. Candidate genes were analysed using real-time quantitative reverse transcription polymerase chain reaction (to verify the accuracy and reliability of the RNA-Seq results. The relative expression of agouti signalling protein (ASIP) and DOPA decarboxylase (DDC) in white-feather quails were increased. Relative expression of homeobox D1 (HOXD1), cathepsin D (CTSD), keratin 2 (KRT2), methyl-CpG binding domain protein 2 (MBD2), and melatonin receptor 1 (MT1) were decreased. The results of this study provide useful data on the analysis of the feather colour regulatory mechanism in white- and maroon-feather quails.","PeriodicalId":21869,"journal":{"name":"South African Journal of Animal Science","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139774260","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

In situ and in vitro degradation parameters of elephant grass silage with sugarcane bagasse 甘蔗渣青贮象草的原位和体外降解参数

IF 0.8 4区农林科学

South African Journal of Animal Science Pub Date : 2024-02-15 DOI: 10.4314/sajas.v53i3.15

R.C. Rodrigues, S.E.A.S. Cavalcante, R.P. Lana, A. Perazzo, L.S Cabral, M.C. Teixeira, I.G.R. Araujo, A.P.R. Jesus, J.S. Araújo, C.S. Costa, M.R. Martins, A.M.P. Santos, P.L.O. Rocha

{"title":"In situ and in vitro degradation parameters of elephant grass silage with sugarcane bagasse","authors":"R.C. Rodrigues, S.E.A.S. Cavalcante, R.P. Lana, A. Perazzo, L.S Cabral, M.C. Teixeira, I.G.R. Araujo, A.P.R. Jesus, J.S. Araújo, C.S. Costa, M.R. Martins, A.M.P. Santos, P.L.O. Rocha","doi":"10.4314/sajas.v53i3.15","DOIUrl":"https://doi.org/10.4314/sajas.v53i3.15","url":null,"abstract":"The objective of this study was to evaluate the chemical composition and in situ degradability of elephant grass silage dry matter with increasing levels of sugarcane bagasse. A completely randomized design was adopted with five treatments: 0, 5, 10, 15, and 20% inclusion of sugarcane bagasse on an as-fed matter basis, with five replications, totalling 25 experimental units. The increasing proportion of sugarcane bagasse analysed was favourable only in increasing the concentration of dry matter and fibre of silages and in maintaining a considerable crude protein content. In the in situ degradation assay, the addition of sugarcane bagasse in silage decreased the ruminal degradability of dry matter, and as the passage rates increased, the effective degradability decreased. In the in vitro gas production assay, the total production of gases was decreased with the inclusion of sugarcane bagasse, as did the degradability of organic matter and neutral detergent fibre. The recommendation for the inclusion of sugarcane bagasse should be analysed according to the desired objective, emphasizing that values higher than 5% can greatly compromise the final nutritive value of elephant grass silage","PeriodicalId":21869,"journal":{"name":"South African Journal of Animal Science","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139774655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microbiological quality assessment of milk and its fermented derivatives produced in the Sfax region, Tunisia 突尼斯斯法克斯地区生产的牛奶及其发酵衍生物的微生物质量评估

IF 0.8 4区农林科学

South African Journal of Animal Science Pub Date : 2024-02-15 DOI: 10.4314/sajas.v53i3.03

R. Jarboui, H. Ghamgui, S. Smaoui, E. Ammar

{"title":"Microbiological quality assessment of milk and its fermented derivatives produced in the Sfax region, Tunisia","authors":"R. Jarboui, H. Ghamgui, S. Smaoui, E. Ammar","doi":"10.4314/sajas.v53i3.03","DOIUrl":"https://doi.org/10.4314/sajas.v53i3.03","url":null,"abstract":"The aim of this study was to evaluate the microbial quality and safety of milk and its derivatives in the Sfax area, Tunisia. Two hundred and forty samples of ultra-high temperature sterilized milk (UHT) and pasteurized milk, and its derivatives (yoghurt, fermented milk, cheese, and butter), collected from in-dustrial sale sites and traditional small-scale dairy processing units, were microbiologically analysed and the results compared to the European commission (EC, 2004) maximum limits. All the UHT steri-lized milks analysed were free of microbial contamination and packaging-stable. However, pasteurized milk by thermal treatment at 63 °C for 30 min showed that 41 and 13% of samples were contaminated with total microbial count (TMC) and Escherichia coli. In the analysed samples, total and faecal coliform bacteria (TC and FC) counts exceeded the EU limits in 17 and 9% of industrial yoghurts; 85 and 54% of traditional yoghurts, and 57 and 29% of traditional butters, respectively. Furthermore, all studied fermented milks (Lben and Raieb) exceeded the EU coliform limits. Considering the traditional soft cheese made with pasteurized milk, 61% of the analysed samples respected EU limits in TC except one sample contaminated with both of E. coli and Staphylococcus aureus. Salmonella spp. and Listeria monocytogenes detection showed that only one pasteurized milk sample was contaminated by L. mon-ocytogenes, without any Salmonella detection. Traditional producers must implement good manufac-turing practices and hazard analysis critical control points (HACCP) to ensure integral safety and quality of dairy products.","PeriodicalId":21869,"journal":{"name":"South African Journal of Animal Science","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139776698","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Screening and preliminary analysis of differentially expressed genes in quail embryos for feather colour based on RNA-Sequencing 基于 RNA 序列筛选和初步分析鹌鹑胚胎中羽毛颜色的差异表达基因

IF 0.8 4区农林科学

South African Journal of Animal Science Pub Date : 2024-02-15 DOI: 10.4314/sajas.v53i3.06

Y. Q. Hu, X. H. Zhang, Y. Z. Pang, Y. Qi, Q. K. Wang, Y. W. Zhao, Z. W. Yuan, T. Wang, L. Huo, S. Ren

{"title":"Screening and preliminary analysis of differentially expressed genes in quail embryos for feather colour based on RNA-Sequencing","authors":"Y. Q. Hu, X. H. Zhang, Y. Z. Pang, Y. Qi, Q. K. Wang, Y. W. Zhao, Z. W. Yuan, T. Wang, L. Huo, S. Ren","doi":"10.4314/sajas.v53i3.06","DOIUrl":"https://doi.org/10.4314/sajas.v53i3.06","url":null,"abstract":"The purpose of this study was to use RNA-Sequencing (RNA-Seq) to screen differentially expressed genes (DEGs) and analyse transcriptomic data from embryonic skin tissues of maroon-feather and white-feather quails. The transcriptome of embryonic skin tissues from quails was sequenced using the Illumina HiSeqTM 2000 sequencing platform. A total of 2 512 DEGs were found. Of these, 550 DEGs were up-regulated and 1 562 DEGs were down-regulated in the skin tissues of white-feather quail embryos. Five hundred and ninety-seven DEGs were enriched and annotated into 50 entries in Gene Ontology (GO) database. The total number of DEGs annotated in each entry in the Kyoto Encyclopedia of Genes and Genomes (KEGG) database was 341, enriched in 230 pathways, of which the tight junction pathway and neuroactive ligand-receptor interaction were the most significantly enriched. Candidate genes were analysed using real-time quantitative reverse transcription polymerase chain reaction (to verify the accuracy and reliability of the RNA-Seq results. The relative expression of agouti signalling protein (ASIP) and DOPA decarboxylase (DDC) in white-feather quails were increased. Relative expression of homeobox D1 (HOXD1), cathepsin D (CTSD), keratin 2 (KRT2), methyl-CpG binding domain protein 2 (MBD2), and melatonin receptor 1 (MT1) were decreased. The results of this study provide useful data on the analysis of the feather colour regulatory mechanism in white- and maroon-feather quails.","PeriodicalId":21869,"journal":{"name":"South African Journal of Animal Science","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139833952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Somatic cell count and an Animal Needs Index to evaluate animal welfare in dairy cattle on farms constructed to the standards of the Agriculture and Rural Development Support Institution 用体细胞计数和动物需求指数评估按照农业和农村发展支助机构标准建造的农场中奶牛的动物福利情况

IF 0.8 4区农林科学

South African Journal of Animal Science Pub Date : 2024-02-13 DOI: 10.4314/sajas.v53i4.01

Hasan Keskin, Mustafa Garip

{"title":"Somatic cell count and an Animal Needs Index to evaluate animal welfare in dairy cattle on farms constructed to the standards of the Agriculture and Rural Development Support Institution","authors":"Hasan Keskin, Mustafa Garip","doi":"10.4314/sajas.v53i4.01","DOIUrl":"https://doi.org/10.4314/sajas.v53i4.01","url":null,"abstract":"In this research, welfare measurements were made on 14 modern dairy cattle farms (Type 1) with similar enterprise scales and built without any support from any institution, and on eight modern dairy cattle farms (Type 2), which were built with the support of the Agriculture and Rural Development Support Institution (ARDSI), in the province of Konya, Turkey. Welfare levels of dairy cattle farms were measured using the Animal Needs Index (ANI) 35L/2000 method. Milk samples were taken from each of these enterprises and somatic cell counts were obtained. Collected data and calculated ANI scores were compared. While there was a substantial difference between the two enterprise types in terms of the scores obtained for stockmanship (welfare measurement) and the general ANI scores, there was no relationship between the enterprise types in terms of somatic cell count. According to the ANI 35L/2000 welfare measurement method, suitable welfare conditions were provided in these enterprises. However, when examining categories that determine the overall ANI welfare score, deficiencies in some welfare criteria such as flooring, stockmanship, and light–air conditions were noted. ","PeriodicalId":21869,"journal":{"name":"South African Journal of Animal Science","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139781680","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0