Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 20 for “"multi-trait"”.
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Implementing multi-trait genomic selection to improve grain milling quality in oat
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-12-01
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Construct Validity of Psychopathy in Mentally Disordered Offenders: A Multi-trait Multi-method Approach
Psychopathy continues to receive increased attention due to the negative outcomes, including recidivism, violence, and poor treatment amenability. Despite the vast amount of attention psychopathy has received, research on its applications to mentally disordered offenders remains sparse. The current …
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Accelerated breeding for winter wheat profitability in a wheat-soybean double-crop system
… constraints using genetic trend analyses, multi-trait genomic prediction of total net merit, and training-set design optimization for early-stage advancement. Three questions organize the research. First, what has been the realized genetic trend for key traits over two decades of selection …
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Construct Validation of an Integrated -Approach EAP Placement Test Using Multi -Group Structural Equation Modeling
The research questions were tested using multi-trait multi-method (MTMM) procedures and multi-group structural equation modeling (MSEM) as the central statistical tool. A review of the statistical methodology of the MTMM procedures as a methodological contribution in literature preceded an …
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Multiple trait analysis for genetic mapping of quantitative trait loci for carcass and beef quality
… of molecular markers to identify quantitative trait loci ( QTL ) affecting economically important traits has become a key approach in animal genetics, both for understanding the genetic basis of these traits and to help design novel breeding programs. The general goal of the present work was to …
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Construct validation of the type A behavior pattern in children: the importance of anger and achievement striving
… empirically examined in the present study. The multi-trait, multi-method construct validation strategy was used to determine if the convergent, concurrent, and discriminant validities of the Type A construct would be supported. Constructs used as comparisons included anger, achievement-striving, …
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One or Many? An Experimental Study of Power and Personality in Autocratic and Democratic Groups
… satisfaction. The current study employs a multi-trait, multi-method test of the interactive effects of decision-making structures and personality on the psychological mindset of leaders in an experimental group setting. Two hundred and sixty-seven students were randomly assigned to 55 work …
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Development and validation of a behavioral measure of drug refusal skills in seventh and eighth graders
… to enhance the measure. In the first study, a multi-trait multi-method matrix (MTMMM) examined the measure's internal consistency and construct validity. The BSRT demonstrated promising convergent validity, but it did show a large amount of method variance. This method variance indicated that …
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Physical Activity and Depression: Validity of Measures and Evidence of Psychosocial Correlates
… subjective measures of physical activity in a Multi-trait Multi-method framework; and (2) Examining a number of psychosocial correlates of physical activity participation. Participants' physical activity levels were measured objectively by wearing both MTI accelerometer and Omron pedometer for …
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Pleiotropy in complex traits
… (GWAS) have uncovered thousands of complex trait loci, many of which are associated with multiple phenotypes. The dedicated study of these pleiotropic effects is becoming increasingly common due to the availability of sample collections with high-dimensional phenotype data, such as the UK …
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Genetic Parameter Estimates of Milkability Traits in South African Holstein Cattle
… a cow’s udder. It is an important functional trait with regard to milking costs as well as udder health. Milkability traits have not been included in the breeding objectives of South African dairy cattle and their genetic parameters in the population have not been estimated. The primary …
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Statistical methods for genetics and genomics studies
… tests for fully observed quantitative traits as well censored data in structured populations with complex genetic relatedness among the sampled individuals. Our methods correct for continuous population stratification by first deriving population structure variables and kinship matrices …
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An Analysis of Carcass, Ultrasonographic, and Projected Measurements of Feedlot Animals to Determine the Benefits and Accuracy of Harvest Groups Vs. Visual Selection
… for descriptive statistics, correlations, and multi-trait regression. The average EstFTU for CKD and NCKD were 1.12 cm and 1.08 cm respectively. By comparison, the average FT for CKD and NCKD were 1.31 cm and 1.08 cm respectively. The NumMS for CKD cattle was 5.07 compared to 4.62 for NCKD …
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Multivariate linear mixed models for statistical genetics
… of the genetic architecture of many important traits, including diseases. However, the statistical analysis of genotype-phenotype associations remains challenging due to multiple factors. First, many traits have polygenic architectures, which means that they are controlled by a large number of …
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Digital Phenotyping and Genomic Prediction Using Machine and Deep Learning in Animals and Plants
… in the prediction of rice grain size-related traits, and certain metabolites were identified as potential candidates for improving multi-trait genomic prediction. Further research showed that metabolic accumulation was low to moderately heritable, and genomic prediction accuracies were …
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Genetic Parameters and Genetic Trends of Female Fertility in Icelandic Dairy Cattle
… and genetic trends of different female fertility traits in Icelandic dairy cattle and suggest new traits for the genetic evaluation. Insemination records for the first three lactations and the heifer period of 52,951 Icelandic cows were used to analyse the traits: conception rate at first …
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Functional analysis of secondary tropical dry forests in a region of the Colombia, Caribbean
… region of the Caribbean coast of Colombia and a multi-trait approach to study functional diversity at three scales: species, communities and landscape. The analysis of the variation in functional traits of SDTF trees at the species level allowed me to support the hypothesis of coordination …
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Genetic control and prediction of milling and baking quality for UK wheat breeding
… quality due to the difficulty in selecting for multiple low throughput and high cost quality traits. This thesis aims to redress this imbalance by taking a quantitative genetics approach to enable enhanced selection for milling and baking quality in collaboration with the DSV UK breeding …
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Investigating the Role of Inflammatory Biomarkers and Incretins in the Aetiology of Type 2 Diabetes and Coronary Heart Disease using Human Genetics
… and ~6,000 ‘omic (metabolomic and proteomic) traits were brought together to systematically assess associations of a known missense variant in GIPR, E354, and infer specificity and potential beneficial or harmful effects of GIPR mono agonism. Bayesian multi-trait colocalisation was used to …
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Development of a multi-breed heifer pregnancy genetic evaluation in beef cattle
… fertility then is an economically relevant trait, though in most cases pregnancy data are cumbersome, untimely to collect, and are considered a rare phenotype in national cattle evaluations (NCE). Despite this, there are successful examples of existing evaluations for heifer pregnancy (HP) …