搜索结果: 46-60 共查到“知识库 家畜育种学”相关记录934条 . 查询时间(4.721 秒)
本研究旨在分析mtDNA变异与产羔数性状的关系。以杜泊、陶赛特、萨福克绵羊为研究对象，通过线粒体基因组测序、基因型分析等技术发现，杜泊羊线粒体基因组编码区存在25个突变位点，包括rRNA突变位点2个，tRNA突变位点2个，多肽编码基因突变位点21个（包括错义突变9个和同义突变12个）；陶赛特羊线粒体基因组编码区存在20个突变位点，包括rRNA突变位点5个，tRNA突变位点1个，多肽编码基因突变位点...
旨在为猪的毛色调控机制和模拟与OCA2基因相关的人类疾病模型的研究建立基础。本研究将GenBank公布的猪OCA2基因序列（NC_010457.4）所缺失的5个外显子（20～24号外显子）进行了克隆和划分，在基因组水平和cDNA水平上采用PCR扩增和Sanger测序方法对划分结果进行了验证；并对OCA2基因进行生物信息学分析，同时在广西巴马小型猪中对OCA2基因外显子的多态位点进行了筛选。采用实时...
利用关联组估计中国大白、长白及杜洛克猪繁殖性状的遗传参数
猪 遗传参数 总产仔数 关联率
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2016/3/30
本研究旨在分析大白、长白及杜洛克3个品种猪在不同联合遗传评估组中总产仔数的遗传参数，为将来全国猪联合遗传评估奠定基础。利用DMU软件的DMU4过程计算74个国家生猪核心育种场间的关联率，根据联合遗传评估组内各场相互存在关联且每个场的平均关联率在3%以上原则，每个品种筛选出3个联合遗传评估组（组1、组2和组3）。利用DMU软件和动物模型估计3个联合遗传评估组中大白、长白及杜洛克猪总产仔数（TNB）性...
Cloning and Expression of Yak Active Chymosin in Pichia pastoris
Active Chymosin Yak Expression Pichia pastoris
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2016/11/10
Rennet, a complex of enzymes found in the stomachs of ruminants, is an important component for cheese production. In our study, we described that yak chymosin gene recombinant Pichia pastoris strain c...
Ileal Amino Acid Digestibility of Broken Rice Fed to Postweaned Piglets with or without Multicarbohydrase and Phytase Supplementation
Amino Acids Digestibility Broken Rice Exogenous Enzymes Metabolism, Nutrient Balance Weaned Pigs
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2016/11/10
Most of amino acid (AA) digestibility values for feed ingredients are obtained using pigs cannulated in the distal ileum. The ileal-cannulated pig model uses pigs older than six weeks due to difficult...
Motility of boar spermatozoa supplemented with homologous seminal plasma of high or low protein content after storage for three days
seminal plasma homologous autologous
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2016/2/23
The effect of adding high or low protein content homologous seminal plasma to boar spermatozoa on the progressive motility of the spermatozoa after storage for three days, and at a 1 : 4 dilution rati...
Effects of Extracellular Matrix Protein-derived Signaling on the Maintenance of the Undifferentiated State of Spermatogonial Stem Cells from Porcine Neonatal Testis
Porcine Spermatogonial Stem Cells Undifferentiation, Extracellular Matrix Proteins
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2016/11/10
In general, the seminiferous tubule basement membrane (STBM), comprising laminin, collagen IV, perlecan, and entactin, plays an important role in self-renewal and spermatogenesis of spermatogonial ste...
Inbreeding depression in the Lizard canary breed estimated by pedigree analysis
genetic disease life span number of surviving offspring phenotypical traits
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2016/1/29
The influence of inbreeding depression on phenotypic traits of the Lizard canary from an Italian breeder was evaluated. The following traits were studied: birds’ life span, number of surviving offspri...
Protective effects of the antioxidants curcumin, ellagic acid and methionine on motility, mitochondrial transmembrane potential, plasma membrane and acrosome integrity in freeze-thawed Merino ram sperm
curcumin ellagic acid methionine
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2016/1/29
The aim of this study was to determine the effects of curcumin, ellagic acid and methionine on sperm parameters following the freeze-thawing of Merino ram semen. Ejaculates were collected via an artif...
Rapamycin Inhibits Expression of Elongation of Very-long-chain Fatty Acids 1 and Synthesis of Docosahexaenoic Acid in Bovine Mammary Epithelial Cells
Bovine Mammary Epithelial Cells Mammalian Target of Rapamycin Complex
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2016/11/10
Mammalian target of rapamycin complex 1 (mTORC1) is a central regulator of cell growth and metabolism and is sufficient to induce specific metabolic processes, including de novo lipid biosynthesis. El...
Methodologies for the Determination of Endogenous Phosphorus Losses in Growing Pigs
Digestibility Gelatin Phosphorus Pigs Protein Sources Regression
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2016/11/10
A study was conducted to compare the endogenous basal losses of phosphorus (EBLP) in pigs fed diets containing gelatin (GEL) or spray-dried porcine plasma (SDPP) as protein sources and to determine th...
旨在研究2014年江苏盐城某猪场全年母猪发情和产仔性能变化与该地区环境温度之间相关性。收集江苏盐城某猪场母猪2014年的返情率、7 d发情率、胎均总仔数、胎均死胎数以及胎均断奶活仔数，猪场所在地日最高温、日最低温、日最高温均值、日最低温均值、日最高温≥30 ℃天数、日最低温≤10 ℃天数，并统计其在全年不同分娩月份平均值及其与环境温度参数之间的相关性。结果表明，7月份日最高温均值和日最低温均值，达...
Preparation and Characterization of an Antibody Antagonist That Targets the Porcine Growth Hormone Receptor
Porcine Growth Hormone Porcine Growth Hormone Receptors Signalling Pathway Antagonist
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2016/11/10
A series of antagonists specifically targeting growth hormone receptors (GHR) in different species, such as humans, rats, bovines, and mice, have been designed; however, there are currently no antagon...
Dietary Phytoncide Supplementation Improved Growth Performance and Meat Quality of Finishing Pigs
Blood Profile Finishing Pig Growth Performance Meat Quality Phytoncide
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2016/11/10
We conducted this 10-wk experiment to evaluate the effects of dietary phytoncide, Korean pine extract as phytogenic feed additive (PFA), on growth performance, blood characteristics, and meat quality ...
Prediction of Carcass Composition Using Carcass Grading Traits in Hanwoo Steers
Carcass Composition Carcass Grading Traits Coefficient of Determination Hanwoo Steer Prediction Equation
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2016/11/10
The prediction of carcass composition in Hanwoo steers is very important for value-based marketing, and the improvement of prediction accuracy and precision can be achieved through the analyses of ind...