Browsing Fakultät für Agrarwissenschaften (inkl. GAUSS) by Referee "Knorr, Christoph Prof. Dr."
Now showing items 1-20 of 25
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Vitrification, warming in sucrose-free medium and transfer of goat and mouse embryos
(2020-05-27)In farm animals, the usage of assisted reproduction programs, implying biotech-nologies such as estrus synchronization, superovulation, cryopreservation of embryos and embryo transfer, to mention some, helps to improve ... -
Control of estrous cycle and superovulation in goats
(2020-05-27)Summary Estrous cycle control is a widely used reproductive biotechnology for controlled breeding of small ruminants. Besides serving the purpose of synchronizing estrus, so that breeding takes place at a particular time, ... -
Tube-Pellets als Alternative zur konventionellen Kryokonservierung
(2018-07-17)Since the introduction of the genomic selection, insemination centers are function with genomically proofed young bulls at the age of 10 months onwards (MELBAUM et al., 2016). Young bulls have a reduced ejaculate volume ... -
Studies on Chicken Hatchability and Its Relation with Egg Yolk Metabolites
(2017-03-27)Hatchability is an important trait for the chicken industry because of its high impact on chicken output. The embryonic survival ability in fertile eggs is greatly influenced by the offspring genotype and the quality of ... -
Studies on the Ascaridia galli embryonal stages, potential maternal protection and immune response in chicken
(2017-01-19)Regarding to a lack of experimental infection models and different maturation ability of Ascaridia galli egg sources (Worm uteri and faeces) in a first study (Paper 1), A.galli eggs isolated from two different sources ... -
Organization and transcription analyses of the immunoglobulin genes in cattle and horses
(2016-06-10)Initial studies on genetic aspects of immunoglobulins were performed on humans and mice but were successfully applied to various other animals such as chicken, rabbit, swine, cattle, and horses, too. Especially in cattle ... -
Genomic selection in farm animals: accuracy of prediction and applications with imputed whole-genome sequencing data in chicken
(2016-03-15)Genomic prediction has been successfully applied in many livestock breeding schemes, based on different densities of single nucleotide polymorphism (SNP) array data. With the availability of whole-genome sequencing (WGS) ... -
Selection signature detection in a diverse set of chicken breeds
(2015-01-28)Over the last decade, interest in detection of genes or genomic regions that are targeted by selection has been growing. Identifying signatures of selection can provide valuable insights about the genes or genomic regions ... -
Attempts to promote the use of cryopreserved bovine semen: Effect of prostaglandin F2-alpha, sucrose and short-term dry ice storage
(2014-01-09)This dissertation argues that improvement of conception to artificial insemination (AI) through approaches that enhance post-thaw quality of bull semen might sustain enthusiasm for this technology and present a greater ... -
Untersuchungen von klimatischen Einflüssen auf die Gesundheit und Milchleistung von Milchkühen in Niedersachsen
(2013-07-30)Global warming will intensify heat stress for dairy cows. Particularly, heat stress affects animal welfare and health negatively. It is widely unknown to which extent different housing systems can alter this stress. ... -
Dissection of molecular basis on a causative mutation for ear size QTL on chromosome 7 in pigs
(2013-07-15)The pinna，an important component of the external ear, first appeared in mammals. It plays a vital role in collecting sounds, radiating heat and signaling mood. In humans, the most common ear defect is microtia with prevalence ... -
Genetic differentiation within and between populations under selection – studies on diverse chicken populations and the Göttingen Minipig
(2013-05-03)In this thesis different aspects of the use of high density markers in the genetic characterisation and analysis of farm and experimental animal populations are addressed. First, a general introduction and an overview over ... -
Untersuchungen zur Belastung von Schweinen bei langen Transporten
(2012-12-10)The legislative authority endeavours to keep animal transports as few and as short as possible with the help of additional requirements. However, animal trade in the EU and in non-European countries is increasing. Each ... -
Untersuchungen zur Rolle von Klf10 und Klf11 als Mediatoren von NGF- und TGF-β-vermittelten Effekten in Zellen neuraler Herkunft
(2012-11-15)The TGF-β1/Klf-family of transcription factors. They play important roles in development and maintenance of various tissues and cell types. The publications consolidated in this thesis describe, that Klf11 mimics TGF-β ... -
Quantitative and molecular genetic studies on temperature-dependent sex determination of Nile tilapia (<i>Oreochromis niloticus</i>)
(2012-06-13)Tilapia is one of the most important species group for aquaculture production. Particularly Nile tilapia (Oreochromis niloticus) amounts to over 80 % of the world tilapia production. All-male populations are favourable due ... -
Synchronization and Superovulation of Boer Goats with PGF2á and GnRH or hCG and Parentage Analysis using Microsatellite Markers
(2011-08-16)The aim of the first investigation was to devise an efficient protocol for getting a satisfactory embryo yield accomplished by combining the recently established ovsynch protocol with pFSH ... -
Helminth infections in laying hens kept in alternative production systems in Germany - Prevalence, worm burden and genetic resistance
(2011-05-11)The aim of this study was to investigate the spectrum and intensity of helminth infections, as well as to estimate seasonal effects on the prevalence and burden of helminths in organic free ... -
STUDY OF GENOMIC STRUCTURE AND SIGNATURES OF RECENT POSITIVE SELECTION IN CATTLE
(2011-02-24)The knowledge of the extent and pattern of linkage disequilibrium (LD) is necessary for estimating the number of SNPs required for implementing association mapping studies as well as ... -
Molekulargenetische Untersuchungen zur Verbesserung der männlichen Fruchtbarkeit und Bekämpfung des Erbdefektes Hernia inguinalis/scrotalis in der Schweinezucht
(2010-02-10)Artificial insemination (AI) is a very common and efficient reproduction method in pig breeding. About 90% of all breeding sows in Germany were inseminate by artificial insemination in 2007. ... -
Analysis of DNA sequence variants in candidate genes for bovine spongiform encephalopathy (BSE) susceptibility located in a QTL region on bovine chromosome 17q23-q24
(2010-02-08)Bovine spongiform encephalopathy (BSE) belongs to a group of diseases called transmissible spongiform encephalopathies (TSE). With the occurrence of the BSE crisis, several studies have ...