搜索结果: 1-15 共查到“农学 Holstein cattle”相关记录16条 . 查询时间(0.062 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 ...
Linkage Disequilibrium and Haplotype Block Structure in Portuguese Holstein Cattle
single nucleotide polymorphism GWAS dairy cattle
2018/3/5
The objectives of this study were to estimate linkage disequilibrium (LD), describe and scan a haplotype block for
the presence of genes that may affect milk production traits in Portuguese Holstein ...
Genetic Parameters of Milk β-Hydroxybutyric Acid and Acetone and Their Genetic Association with Milk Production Traits of Holstein Cattle
Ketosis Milk β-Hydroxybutyrate Milk Acetone Milk Composition Genetic Parameters
2016/11/10
This study was conducted to estimate the genetic parameters of β-hydroxybutyrate (BHBA) and acetone concentration in milk by Fourier transform infrared spectroscopy along with test-day milk production...
Effect of the FGF2 SNP11646 on milk production and fertility traits of Holstein cattle
dairy cow fibroblast growth factor single nucleotide polymorphism linear mixed model
2016/9/1
The objective of this study was to estimate the effect of a single-nucleotide polymorphism (SNP11646) in the FGF2 (Fibroblast Growth Factor 2) gene on the deregressed proof of breeding values (DRP) of...
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...
Heritabilities and genetic correlations of lactational and daily somatic cell score with conformation traits in Polish Holstein cattle
conformation traits somatic cell score dairy cattle genetic parameters
2015/6/9
The objective of this study was to estimate heritabilities and genetic correlations of lactational and daily somatic cell scores with descriptive and linear type traits in Polish Holstein-Friesian cow...
Genetic parameters for linear type traits in Czech Holstein cattle
linear type traits genetic parameters dairy cattle
2015/6/9
The objectives of this study were to estimate genetic parameters for 18 currently recorded linear conformation traits in Czech Holstein cattle. The data set consisted of 78 886 first-lactating Holstei...
The effect of growth and development intensity in replacement heifers on economically important traits of Holstein cattle in the Czech Republic
Heifer intensity of growth and development average daily live weight gain milk yield reproduction Holstein cattle
2015/6/4
The objective of the study was to determine the effect of growth and development intensity in Holstein replacement heifers on economically important animal traits. The intensity of growth was assessed...
Selection index for bulls of Holstein cattle in the Czech Republic
selection index Holstein cattle bulls
2015/6/1
Complex selection indexes are proposed for bulls of Holstein cattle in the Czech Republic. Partial breeding values for milk performance, fertility and body conformation are combined in the index. Conf...
Factor Analysis of Linear Type Traits and Their Relation with Longevity in Brazilian Holstein Cattle
Autovalues Final Score Milk Production Linear Regression Longevity, Holstein
2016/5/16
In this study we aimed to evaluate the reduction in dimensionality of 20 linear type traits and more final score in 14,943 Holstein cows in Brazil using factor analysis, and indicate their relationshi...
Chinese Holstein Cattle Shows a Genetic Contribution from Native Asian Cattle Breeds: A Study of Shared Haplotypes and Demographic History
Chinese Holstein Cattle Native Asian Cattle Mitochondrial DNA Demographic History Mismatch Distribution
2016/5/6
The Chinese Holstein cattle breed, an introduced breed in China, has been crossbred with native cattle breeds. We hypothesised that the Chinese Holstein local population in Beijing share haplotypes wi...
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
2016/5/6
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...
HOLSTEIN CATTLE REPRODUCTION IN RELATION ON MILK YIELD AND BODY CONDITION SCORE
Holstein cattle reproduction milk yield
2010/12/7
One of the basic conditions of the economical success in milk production is the high and periodic reproduction of the cows. That means the parturition of a healthy calf from every cow per a year. The ...
Development of a breeding objective for Estonian Holstein cattle
economic weights production traits functional traits
2010/8/9
Economic weights for milk carrier (water plus lactose), fat and protein yields, calving interval, age at first service, interval between the first service and conception of heifers and length of produ...
Genetic parameters for test-day model with random regressions for production traits of Czech Holstein cattle
test-day yields random regression model genetic parameters Czech Holstein cattle
2015/6/1
Multiple-lactation random regression model was applied to test-day records of milk, fat and protein yields in the first three lactations of the Czech Holstein breed. Data included 9 583 cows, 89 584, ...