نتایج جستجو برای: first parity holsteins

تعداد نتایج: 1461558  

2015
Douglas Lyman Laura J. Clark Kristin Campbell

An extensive review of Wisconsin Veterinary Diagnostic Laboratory(WVDL) accessions along with the results of slaughter house surveys indicate that copper is accumulating in the livers of Wisconsin Holsteins of all ages. Two hundred eleven WVDL accessions were reviewed based on breed(Holstein), age and results of inductively coupled plasma-mass spectroscopy(ICP-MS) liver element testing. The ove...

2017
Donghyun Shin Chul Lee Kyoung-Do Park Heebal Kim Kwang-hyeon Cho

OBJECTIVE Holsteins are known as the world's highest-milk producing dairy cattle. The purpose of this study was to identify genetic regions strongly associated with milk traits (milk production, fat, and protein) using Korean Holstein data. METHODS This study was performed using single nucleotide polymorphism (SNP) chip data (Illumina BovineSNP50 Beadchip) of 911 Korean Holstein individuals. ...

Journal: :Journal of animal science 1991
L D Van Vleck K E Gregory S E Echternkamp

A genetic correlation near unity between ovulation rate in heifers and later twinning frequency led to consideration of using measures of ovulation rate in heifers for each estrous cycle, beginning at puberty, to increase accuracy of selection for twinning rate. An initial evaluation with a multiple trait animal model for predicting breeding values included six genetic groups: 1) selected Scand...

Journal: :Journal of dairy science 2010
I Aguilar I Misztal D L Johnson A Legarra S Tsuruta T J Lawlor

The first national single-step, full-information (phenotype, pedigree, and marker genotype) genetic evaluation was developed for final score of US Holsteins. Data included final scores recorded from 1955 to 2009 for 6,232,548 Holsteins cows. BovineSNP50 (Illumina, San Diego, CA) genotypes from the Cooperative Dairy DNA Repository (Beltsville, MD) were available for 6,508 bulls. Three analyses u...

2014
Chih-Cheng Chen Hui-Fen Chiu Chun-Yuh Yang

This study was undertaken to examine whether there is an association between age at first birth and parity and risk of asthma death. The study cohort consisted of 1,292,462 women in Taiwan who had a first live birth between 1 January 1978 and 31 December 1987. We tracked each woman from the date of their first childbirth to 31 December 2009, and their vital status was ascertained by linking rec...

Journal: : 2021

Die Einflüsse von Habitatparametern und das Vorkommen anderer Arten auf die Haselmaus sowie Aktivitätsphasen dieser Art wurden mit Kamerafallen Lockmittel in isolierten Straßenrandhabitaten im Westen Schleswig-Holsteins Osten Hamburgs untersucht. gemittelte Anzahl Nächten bis zum ers- ten Nachweis betrug 5,88 (± 4,55) Individuen oft nur einmal gesichtet. Ein Muster drei nächtlichen Aktivitätssc...

Journal: :Journal of dairy science 2010
B Fuerst-Waltl M K Sørensen

Mortality in dairy cattle is not only relevant with regard to economic losses but also to animal health and welfare. Thus, the aim of this investigation was to explore the genetic background of postnatal mortality in calves and replacement heifers in different age groups until first calving in Danish Holsteins. Records of Danish Holstein heifer calves born in the years 1998 to 2007 were extract...

Journal: :Journal of animal science 2013
A N Hafla G E Carstens T D A Forbes L O Tedeschi J C Bailey J T Walter J R Johnson

The objectives of this study were to determine if residual feed intake (RFI) classification of beef heifers affected efficiency of forage utilization, body composition, feeding behavior, heart rate, and physical activity of pregnant females. Residual feed intake was measured in growing Bonsmara heifers for 2 yr (n=62 and 53/yr), and heifers with the lowest (n=12/yr) and highest (n=12/yr) RFI we...

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