Browsing Fakultät für Agrarwissenschaften (inkl. GAUSS) by Referee "Simianer, Henner Prof. Dr."
Now showing items 1-20 of 25
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Investigation of machine learning approaches to predict quantitative traits using environmental and genomic information
(2023-02-01)In plant breeding, genotype-by-environment (G × E) interactions represent a substantial source of variation underlying complex phenotypic traits. A better understanding of G × E interactions can be beneficial to design ... -
Arrays and beyond: Evaluation of marker technologies for chicken genomics
(2022-01-04)A key research question in livestock research is how livestock’s phenotypic diversity is shaped by its genomic diversity. Genomic diversity is thereby assessed through genomic markers. The use and definition of genomic ... -
Deciphering the genetic background of quantitative traits using machine learning and bioinformatics frameworks
(2021-10-08)In this thesis, I developed two frameworks that can help highlight the genetic mechanisms underlying quantitative traits. In this regard, my focus was to design efficient methodologies to discover genotype-phenotype ... -
Accounting for Epistasis in Genomic Phenotype Prediction
(2021-06-03)Wide availability of genomic data has had a considerable impact on plant and animal breeding programs which enables the study of genotypes and their relationships with phenotypes. Improving genomic prediction accuracy is ... -
Identification of candidate signature genes and key regulators associated with trypanotolerance in the Sheko breed
(2020-05-19)African Animal Trypanosomiasis (AAT) is caused by a protozoan parasite that affects the health of livestock. Livestock production in Ethiopia is severely hampered by AAT and various controlling measures were not successful ... -
Genotype by temperature interaction effects on sex determination in zebrafish (Danio rerio)
(2019-12-06)The mechanism of sex determination and gonad differentiation in zebrafish is one of the more challenging research questions and complex puzzles in biology. The regulation of sexual dimorphism in this species is not yet ... -
Methods and software to enhance statistical analysis in large scale problems in breeding and quantitative genetics
(2019-11-08)The aim of this thesis is the development of methods and software to enhance the statistical analysis in large scale problems in breeding and quantitative genetics. In Chapter 1 a brief introduction to the subject of big ... -
Integrating Omics Data into Genomic Prediction
(2019-07-26)Prediction of genetic values plays a central role in quantitative genetics and breeding. Genomic prediction making use of genome-wide single nucleotide polymorphisms (SNPs) was widely adopted to predict breeding values in ... -
Genomic and conventional evaluations for fertility traits in pigs
(2019-01-17)The aim of genomic selection (GS) is to predict breeding values with high accuracy for young animals (without own phenotypic record) as early as possible. GS can increase the accuracy of the breeding values at the time ... -
Genetic evaluation of longevity in dairy cattle - A new model for an old trait
(2017-11-23)Longevity is an important trait in dairy cows, reflecting the overall functionality of a cow. The aim of this thesis was the development of a new model for the routine genetic evaluation of longevity in German Holsteins. ... -
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 ... -
Lost in Transition - Genetic, Transcriptomic and Breeding Aspects of Metabolic Robustness in Dairy Cows
(2016-12-12)The transition phase of dairy cows is marked by severe metabolic stress resulting from a discrepancy of a high energy demand for rapidly increasing milk production and limited feed intake. Here, a failure in metabolic ... -
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) ... -
Towards Conservation of Omani Local Chicken: Management, Performance and Genetic Diversity
(2014-06-26)Many rural families in Oman are engaged in agricultural and animal husbandry activities with a majority still depending on farming as a main source of income. Local chicken farming in Oman represents one of the main ... -
Application of selection index theory comprising genomic information to breeding programs of sport horses and pigs
(2013-12-17)This thesis presents three model calculations based on selection index theory to evaluate the benefit of genomic information for the optimization of current breeding strategies in sport horses and pigs. In chapter one, an ... -
Accuracy of Genomic Prediction in Dairy Cattle
(2013-12-06)Prediction of genomic breeding values has become a popular tool for obtaining reliable breeding values of animals without phenotypic information, especially in dairy cattle breeding. The main focus of this thesis was to ... -
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 ... -
Genetic progress and inbreeding rate in complex breeding programmes – Applications to sport horses and laying hens
(2013-03-22)The main focus of this thesis is the optimization of breeding programmes. On the one hand a new method to account for the average inbreeding in the design of breeding programmes has been developed. On the other hand two ... -
Controlling of dairy cattle breeding programs
(2012-01-16)The overall goal of this study was to develop possible controlling approaches for dairy cattle breeding programs. For this reason different topics from practical dairy cattle breeding were ... -
A Whole Genome Scanning for QTL Affecting Leg Weakness and Its Related Traits in a White Duroc × Erhualian Resource Population
(2009-02-23)A linkage map comprising 194 microsatellite markers across the pig genome was constructed with a large scale White Duroc × Erhualian resource population. The marker order on this linkage ...