搜索结果: 1-15 共查到“家畜繁殖学 Holstein”相关记录19条 . 查询时间(0.218 秒)
Claw health and feed efficiency as new selection criteria in the Czech Holstein cattle Krupová Z., Wolfová M., Krupa E., Přibyl J., Zavadilová L.
dairy cattle breeding objective selection index economic weights prognosis
2018/11/23
The objective of this study was to calculate economic weights for ten current breeding objective traits and for four new traits characterising claw health and feed efficiency in Czech Holstein cattle ...
Effect of insemination-related factors on pregnancy rate using sexed semen in Holstein heifers
Holstein sex-sorted semen estrus sperm quality intracornual insemination fertility
2016/12/20
The objectives were to determine the effects of insemination with sexed semen at spontaneous and induced estrus, fixed-time insemination at synchronized estrus, the deposition site, estrous intensity,...
Genetic correlations between type traits of young Polish Holstein-Friesian bulls and their daughters
dairy cattle conformation traits
2015/7/7
The objective of this study was to evaluate the usefulness of young bulls’ conformation scores
in a national type evaluation system. For this purpose the genetic correlations between conformation tr...
Effect of age at first calving on longevity and fertility traits for Holstein cattle
functional traits survival analysis linear model cattle
2015/6/24
Effects of age at first calving (AFC) on functional longevity of Czech Holstein cows and their reproduction traits in the first lactation were analyzed using the first lactation data of 605 538 Holste...
Genetic parameters for female fertility and milk production traits in first-parity Czech Holstein cows
dairy cattle reproduction production
2015/6/23
The aim of this study was to estimate genetic parameters for female fertility and production
traits in first-parity Czech Holstein cows and to quantify the effect of using this information on the ac...
Analysis of non-genetic factors affecting calving difficulty in the Czech Holstein population
calving process gestation length age at first calving preceding calving interval dairy cattle
2015/6/5
The objective of this study was to analyze the effects of non-genetic factors affecting calving difficulty in the Holstein population of the Czech Republic for subsequent compilation of the model for ...
Relationships between the incidence of health disorders and the reproduction traits of Holstein cows in the Czech Republic
health fertility parameters dairy cows
2015/6/4
The objective of this study was to evaluate the relationships between several health disorders: milk fever (MF; hypocalcaemia and parturient paresis), retained placenta (RP; retained foetal membranes)...
Reproductive Performance of Holstein Dairy Cows Grazing in Dry-summer Subtropical Climatic Conditions: Effect of Heat Stress and Heat Shock on Meiotic Competence and In vitro Fertilization
Artificial Insemination Heat Shock Oocyte Meiotic Maturation Maternal Heat Stress
2015/5/18
The present study was designed to evaluate how environmental factors in a dry-summer subtropical climate in Terceira-Azores (situated in the North Atlantic Ocean: 38° 43′ N 27° 12′ W) can affect dairy...
Testicular Cell Indices and Peripheral Blood Testosterone Concentrations in Relation to Age and Semen Quality in Crossbred (Holstein Friesian×Tharparkar) Bulls
Fine Needle Aspiration Cytology Testicular Cytogram Testicular Cell Indices Crossbred Bulls
2014/5/17
Present study analyzed the changes in peripheral blood testosterone concentrations and testicular cytogram in relation to age and semen quality in crossbred males. Three different age groups of crossb...
Principal Milk Components in Buffalo, Holstein Cross, Indigenous Cattle and Red Chittagong Cattle from Bangladesh
Free Amino Acids Milk Fat Globule Size Fatty Acids Minerals Carbohydrates
2014/5/16
The aim of the present study was to get a total physical and chemical characterization and comparison of the principal components in Bangladeshi buffalo (B), Holstein cross (HX), Indigenous cattle (IC...
Improving Productive and Reproductive Performance of Holstein Dairy Cows through Dry Period Management
Reproductive Performance, Holstein Dairy Cows
2013/5/11
To determine the effects of dry period (DP) length on milk yield, milk composition, some blood metabolites, complete blood count (CBC), body weight and score and follicular status, twenty five primipa...
Phenotypic Relationship between Lactation Persistency and Change in Body Condition Score in First-lactation Holstein Cows
Body Condition Score Cow Lactation Persistency
2011/5/6
We examined the correlations between lactation curve shape, including persistency and changes in body condition score (BCS) during early-stage (0 to 30 days in milk (DIM)), nadir-stage (31 to 90 DIM),...
Effects of Cooling and Exogenous Bovine Somatotropin on Hematological and Biochemical Parameters at Different Stages of Lactation of Crossbred Holstein Friesian Cow in the Tropics
Cooling Recombinant Bovine Somatotropin Hematology Blood Chemistry Crossbred Holstein Freisian
2011/5/6
Effects of cooling and supplemental recombinant bovine somatotropin (rbST) on hemato-biochemical characteristics were studied at different stages of lactation of crossbred Holstein Friesian cows in a ...
Variability of Osteocalcin Status in Chinese Holstein Cattle: Do Phylogeny, Vitamin D or Gene Polymorphisms Matter?
Osteocalcin Vitamin D Population Structure Single Nucleotide Polymorphisms D-loop Bos taurus
2011/5/6
Osteocalcin (OC), a marker of bone turnover, displays patterns in relation to physiological and genetic factors. Here, we present an association study in a population of Chinese Holstein cattle (n = 2...
Interrelationships of growth hormone AluI polymorphism, insulin resistance, milk production and reproductive performance in Holstein-Friesian cows
growth hormone AluI polymorphism dairy cow
2008/3/17
Healthy multiparous Holstein-Friesian cows (n = 22, parity: 2–4) from a large-scale dairy herd in
Hungary were subjected to an intravenous glucose tolerance test 10–15 days after calving. AluI genot...