搜索结果: 1-15 共查到“生物学 Holstein Cows”相关记录19条 . 查询时间(0.093 秒)
The relationship between somatic cell count, milk production and six linearly scored type traits in Holstein cows
cattle linear evaluation of type traits somatic cell count milk production
2015/6/4
Test-day records of somatic cell count (SCC), milk yield, fat and protein content and six linearly scored type traits (fore udder attachment, udder depth, central ligament, rear udder height, front te...
Genetic Parameters for Linear Type Traits and Milk, Fat, and Protein Production in Holstein Cows in Brazil
Dairy Cattle Functional Trait Genetic Correlation Heritability Selection
2016/5/18
The objective of this study was to estimate genetic and phenotypic parameters for linear type traits, as well as milk yield (MY), fat yield (FY) and protein yield (PY) in 18,831 Holstein cows reared i...
Study on Genetic Evaluation for Linear Type Traits in Holstein Cows
Dairy Cattle Linear Type Trait Genetic Evaluation International Comparison
2016/5/3
The objectives of this study were to i) investigate genetic performance for linear type traits of individual Holstein dairy cows, especially focusing on comparative traits, and to estimate genetic var...
Estimation of Genetic Parameters for Milk Production Traits Using a Random Regression Test-day Model in Holstein Cows in Korea
Random Regression Model Heritability Test-day Milk Production Traits Heterogeneity
2016/4/29
This study was conducted to compare three models: two random regression models with and without considering heterogeneity in the residual variances and a lactation model (LM) for evaluating the geneti...
Proteomic Approach Analysis of Mammary Membrane Proteins Expression Profiles in Holstein Cows
Holstein Cows Mammary Gland Proteome Bioinformatics Software
2016/4/29
To investigate host defense mechanisms for protecting the mammary gland from mastitis infection, the membrane fraction of mammary tissues from Holstein cows was purified by differential velocity centr...
Optimum Model for Analyzing Lifetime Profitability of Holstein Cows
Relative Net Income Regression Analysis Iranian Holstein
2016/4/27
This study was on the relative net income (RNI) for 18,286 Iranian Holstein cows from 799 herds, with first freshening between 1991 and 2000. Two kinds of production system, which differed mainly in m...
Prepartum Feeding of Cationic or Anionic Diets to Holstein Cows Given 30 or 60 Day Dry Periods: Comparison of Dry Matter Intake, Physiological Measures and Milk Production
Cationic-anionic Diets Dairy Cows DCAD Milk Yield Periparturient Period
2016/4/27
Eighty-four Holstein cows were used to evaluate effects of feeding two diets that differed in dietary cation-anion difference (cationic; +28 or anionic; -138 mEq/kg DM) on prepartum and postpartum dry...
Milk Protein Production and Plasma 3-Methylhistidine Concentration in Lactating Holstein Cows Exposed to High Ambient Temperatures
Dairy Cows Heat Stress Milk Production Energy Protein Protein Degradation
2016/4/21
This experiment was performed to examine the influences of high ambient temperature on milk production, nutrient digestibility, energy and protein sufficiency ratio, and plasma metabolites concentrati...
Prediction of Future Milk Yield with Random Regression Model Using Test-day Records in Holstein Cows
Test Day Holstein Cows Random Regression Model Future Milk Yield
2016/4/21
Various random regression models with different order of Legendre polynomials for permanent environmental and genetic effects were constructed to predict future milk yield of Holstein cows in Korea. A...
Effect of Close-up Dry Period Protein Level on Preparturiental Nitrogen Balance and Lactating Performance of Primigravid and Multiparous Holstein Cows
Holstein Cow Transition Period Protein Level Nitrogen Balance Milk Production Primigravid Cow
2016/4/21
This study compared the effects of two levels of crude protein (CP) supplementation during a close-up dry period on the productive performance, nitrogen balance, and blood profiles of Holstein cows. E...
Association of Leptin Polymorphism with Production, Reproduction and Plasma Glucose Level in Iranian Holstein Cows
Holstein Cows Leptin Polymorphism Milk Yield Reproductive Performance
2016/4/21
The objective of this study was to evaluate the association of genetic differences in the bovine leptin gene and milk yield, reproduction, body condition score (BCS), and plasma glucose level in Irani...
Genetic Variation of Growth Hormone Gene and Its Relationship with Milk Production Traits in China Holstein Cows
China Holstein Cows Growth Hormone Gene PCR-RFLP Genetic Polymorphism Milk Production Traits
2016/4/20
Associations were analysed between polymorphisms localized in intron 3 of the growth hormone gene (GH-MspI) and milk production traits of 543 China Holstein cows. A PCR-RFLP method was used for identi...
Study on Milkability Traits in Holstein Cows
Milkability Holstein Cow Correlation Milking Time Milking Speed
2016/4/20
The present investigation was undertaken to study the milkability characteristics of Holstein cows. Out of 6,660 initial records 4,607 records were finally included in the analysis after deleting some...
Genetic Parameters of Milk Yield and Milk Fat Percentage Test Day Records of Iranian Holstein Cows
Genetic Parameters TD Records Animal Model Iranian Holstein
2016/4/20
Genetic parameters for first lactation milk production based on test day (TD) records of 56319 Iranian Holstein cows from 655 herds that first calved between 1991 and 2001 were estimated with restrict...
Responses of Holstein Cows to Different Bovine Somatotropin (bST) Treatments during the Transition Period and Early Lactation
Holstein Cows Milk Production bST Doses DMI Transition Period Hormones
2016/4/15
Major objective was to evaluate three doses of bST (POSILAC짰) injected into Holstein cows during the transition period and through 56 d of lactation for potential to improve DMI, BCS, BW, metab...