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Dissertations / Theses on the topic 'Trait heritability'

Author: Grafiati
Published: 2 June 2025
Last updated: 31 July 2025

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1

Barthold, Julia A. "A demographic perspective on trait heritability and sex differences in life history." Thesis, University of Oxford, 2015. http://ora.ox.ac.uk/objects/uuid:94f04aac-182f-466b-a267-179d68db398f.

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Biologists have long used demographic approaches to answer questions in ecology and evolution. The utility of these approaches has meant a constant development and refinement of methods. A key milestone has been the development of phenotype structured population models that link ecology and evolution. Moreover, biostatistical research steadily improves methods to coax demographic information from scarce data. In this thesis, I build upon some of the recent advances in the field. My first three studies focus on the consequences of sex differences in life history for population dynamics. Firstly
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2

Rowlatt, Amy Elizabeth. "Inheritance of DNA methylation level in healthy human tissues." Thesis, University of Edinburgh, 2016. http://hdl.handle.net/1842/25515.

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DNA methylation (DNAm) is the covalent modification of DNA by addition of a methyl group primarily at the cytosine directly upstream of a guanine. DNAm level plays a central role in transcriptional regulation and is linked to disease. Therefore, understanding genetic and environmental influences on DNAm level in healthy tissue is an important step in the elucidation of trait and disease etiology. However, at present only a minority of easy to access human tissues and ethnicities have been investigated. Therefore, we studied DNAm level measured in five human tissues: cerebellum, frontal cortex,
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Coan, Jr James A. "The heritability of trait frontal EEG asymmetry and negative emotionality: Sex differences and genetic nonadditivity." Diss., The University of Arizona, 2003. http://hdl.handle.net/10150/280273.

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The heritability of personality was addressed using a psychophysiological measure, midfrontal EEG asymmetry, and a paper and pencil measure, the Multidimensional Personality Questionnaire (MPQ). The degree to which midfrontal EEG asymmetry was correlated with the scales of the MPQ was assessed. Relatively greater right midfrontal EEG asymmetry was associated with higher Absorption and Negative Emotionality scores in both the Cz and linked mastoid reference schemes in females, but not in males. Relatively greater right midfrontal EEG asymmetry was also associated with higher Traditionalism and
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4

Moran, Maradiaga Jorge Luis. "Quantitative trait loci affecting the agronomic performance of a Sorghum bicolor (L.) Moench recombinant inbred restorer line population." Diss., Texas A&M University, 2003. http://hdl.handle.net/1969/465.

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5

Pereira, Marcio Cinachi [UNESP]. "Avaliação genética da reconcepção de fêmeas primíparas da raça Nelore." Universidade Estadual Paulista (UNESP), 2008. http://hdl.handle.net/11449/104919.

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Made available in DSpace on 2014-06-11T19:33:32Z (GMT). No. of bitstreams: 0 Previous issue date: 2008-12-17Bitstream added on 2014-06-13T20:05:37Z : No. of bitstreams: 1 pereira_mc_dr_jabo.pdf: 621440 bytes, checksum: 260b1b949ce4be72f4da602866530c0c (MD5)<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)<br>Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)<br>A otimização da eficiência econômica dos rebanhos bovinos está diretamente relacionada à vida reprodutiva das matrizes. Assim, espera-se que o incremento na taxa de reconcepção de fêmeas primíparas le
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Pereira, Marcio Cinachi. "Avaliação genética da reconcepção de fêmeas primíparas da raça Nelore /." Jaboticabal : [s.n.], 2008. http://hdl.handle.net/11449/104919.

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Resumo: A otimização da eficiência econômica dos rebanhos bovinos está diretamente relacionada à vida reprodutiva das matrizes. Assim, espera-se que o incremento na taxa de reconcepção de fêmeas primíparas leve a um aumento produtividade da pecuária de corte. O trabalho teve o objetivo de avaliar a reconcepção de fêmeas primíparas de um rebanho comercial da raça Nelore, utilizando inferência Bayesiana, modelo de sobrevivência e Método ℜ, com intuito de verificar a possibilidade de utilizar a característica como critério de seleção. Os registros analisados são provenientes de fêmeas da raça Nel
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7

Koch, Rainer, Ulrich Julius, Werner Jaross, and Hans-Egbert Schröder. "Estimation of the Heritability of Latent Variables Which Are Included in a Structural Model for Metabolic Syndrome." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-137470.

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In a study looking for risk factors of atherosclerosis in families with combined hyperlipidemia and hypertension, clinical and biochemical data of 1,149 persons were analyzed to develop two hypothetical multivariate scores concerning the degree to which a patient is affected by the metabolic syndrome. The scores are based on a structural model for low-density cholesterol (LDL) and high-density cholesterol (HDL), triglycerides, uric acid, creatinine, glucose, insulin, systolic blood pressure and waist-to-hip ratio. Age, gender and body mass index were used for adjusting all variables. In segreg
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Koch, Rainer, Ulrich Julius, Werner Jaross, and Hans-Egbert Schröder. "Estimation of the Heritability of Latent Variables Which Are Included in a Structural Model for Metabolic Syndrome." Karger, 2001. https://tud.qucosa.de/id/qucosa%3A27735.

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In a study looking for risk factors of atherosclerosis in families with combined hyperlipidemia and hypertension, clinical and biochemical data of 1,149 persons were analyzed to develop two hypothetical multivariate scores concerning the degree to which a patient is affected by the metabolic syndrome. The scores are based on a structural model for low-density cholesterol (LDL) and high-density cholesterol (HDL), triglycerides, uric acid, creatinine, glucose, insulin, systolic blood pressure and waist-to-hip ratio. Age, gender and body mass index were used for adjusting all variables. In segreg
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9

Hedlund, Lars-Erik. "Response Time as Self-Schema Indicator : Implications for Personality Assessment." Doctoral thesis, Uppsala universitet, Institutionen för psykologi, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-112128.

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The focal objective of this thesis was to examine the potential advantage of introducing the self-schema concept, indexed by response time, into personality assessment. The basic rationale for the use of response time is that a self-schema facilitates response time for self-referent information as it permits people to make assessments easier and automatic. A self-schema is a cognitive structure containing the generic knowledge that people have about themselves, influencing all aspects of the processing of self-relevant information in order to organize, summarize and explain their behavior. Pap
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10

Taporoski, Tâmara Pessanha. "Herdabilidade das funções cognitivas em um estudo de coorte familiar: Projeto Corações de Baependi." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/5/5142/tde-03072018-083447/.

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INTRODUÇÃO: Muitos são os fatores que contribuem para o desempenho cognitivo, porém o peso dos fatores genético, ambiental e sociodemográfico na composição das funções cognitivas ainda é pouco conhecido, especialmente em amostras brasileiras. Portanto, como o cálculo de herdabilidade estima a proporção da variância total do fenótipo atribuída ao fator genético, o presente trabalho avaliou a herdabilidade do desempenho em diferentes testes cognitivos em uma coorte de famílias com o propósito de melhor investigar os aspectos biológicos associados à performance cognitiva. MÉTODOS: Foram avaliados
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11

Leite, Carla Daniela Suguimoto. "Efeitos genéticos e ambientais sobre o intervalo desmame-cio em fêmeas suínas /." Jaboticabal : [s.n.], 2009. http://hdl.handle.net/11449/92600.

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Resumo: A seleção baseada em características reprodutivas tem sido muito empregada em programas de melhoramento genético de suíno. Assim, objetivaram-se avaliar os efeitos ambientais e genéticos que influenciam o intervalo desmame-cio (IDC) e verificar sua influência no número de nascidos total (TL), nascidos vivos (NV) e mortos (NM) em fêmeas suínas. Para análise dos efeitos ambientais, utilizaram-se 8.104 dados da 1ª a 6ª ordem de parição, e, para as estimativas dos parâmetros genéticos, apenas as informações do 1º ao 3º IDC, o que resultou em 6.548 observações, que foram analisadas pelo mét
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12

Fang, Zih-Hua. "The genetic background of bovine αs1- and αs2-casein phosphorylation". Thesis, Paris, Institut agronomique, vétérinaire et forestier de France, 2017. http://www.theses.fr/2017IAVF0020.

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La phosphorylation des caséines (CN) est une modification post-traductionnelle qui permet l’aggrégation des caséines sous formes de micelles. La stabilité de ces structures est essentielle pour transporter les minéraux au nouveau-né et fabriquer des produits laitiers. Il est par conséquent fondamental d'explorer la variation du degré de phosphorylation (PD) des CN, et d'étudier dans quelle mesure les facteurs génétiques contribuent à cette variation. Cette thèse visait à étudier le contexte génétique de la composition des protéines du lait de vache, en mettant l'accent sur la phosphorylation d
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13

Leite, Carla Daniela Suguimoto [UNESP]. "Efeitos genéticos e ambientais sobre o intervalo desmame-cio em fêmeas suínas." Universidade Estadual Paulista (UNESP), 2009. http://hdl.handle.net/11449/92600.

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Made available in DSpace on 2014-06-11T19:26:07Z (GMT). No. of bitstreams: 0 Previous issue date: 2009-02-16Bitstream added on 2014-06-13T19:12:58Z : No. of bitstreams: 1 leite_cds_me_jabo.pdf: 286709 bytes, checksum: 5dbd29633c088bfd8c09e91c549a77c3 (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>A seleção baseada em características reprodutivas tem sido muito empregada em programas de melhoramento genético de suíno. Assim, objetivaram-se avaliar os efeitos ambientais e genéticos que influenciam o intervalo desmame-cio (IDC) e verificar sua influência no núme
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14

Meehan, Anna, and Henrik Evertsson. "Genetic and Environmental Influences on Psychopathic Personality Traits : A Meta-Analytic Review." Thesis, Örebro universitet, Institutionen för juridik, psykologi och socialt arbete, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-27685.

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To understand the etiology of psychopathic personality traits and thus in the long run to be able to develop successful prevention, a first step is to find out what role genetic and environmental effects play. A meta-review of 15 twin studies (N=26, 981), was conducted to estimate the magnitude of genetic and environmental influences on psychopathic personality traits. The results show that additive genetic (heritable) factors and non-shared environmental factors each explain 50% of the variance in psychopathic personality traits, while shared environmental factors were of no importance. Measu
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15

Zhang, Xueyi Zhang. "Enrichment of Heritability Across Several Hypertension Related Traits." Case Western Reserve University School of Graduate Studies / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=case152301297309475.

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16

Rattiste, Kalev. "Life History of the Common Gull (Larus canus) : A Long-Term Individual-Based Study." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis (AUU), 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-7350.

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17

Griffin, Damian Gerard. "A family-based study investigating the genetic basis of calcium-containing kidney stones." Thesis, University of Southampton, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.368068.

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18

Billardon, Fannie. "Heritability of Flight Energetics and its Associated Traits in the Bumblebee Bombus Impatiens." Thèse, Université d'Ottawa / University of Ottawa, 2013. http://hdl.handle.net/10393/30164.

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Recent studies suggest a possible correlated evolution of wing morphology, wing beat frequency, muscle biochemistry and flight metabolic rate in bees. In order to investigate the degree to which natural selection can act on these traits, an estimation of heritability was required. Commercial and laboratory reared colonies from wild caught queens were used to estimate narrow-sense (h2) and broad-sense (H2) heritability of flight metabolic rate and its associated traits in the bumblebee Bombus impatiens. h2 estimates obtained from parent-offspring regressions were not statistically significant.
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Nagy, Réka. "Genetic analysis using family-based populations." Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/28978.

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Most human traits are influenced by a combination of genetic and environmental effects. Heritability expresses the proportion of trait variance that can be explained by genetic factors, and the 1980s heralded the beginning of studies that aimed to pinpoint genetic loci that contribute to trait variation, also known as quantitative trait loci (QTLs). Subsequently, the availability of cheap, high-resolution genotyping chips ushered in the era of genome-wide association studies (GWAS). These genetic studies have discovered many associations between single-nucleotide polymorphisms (SNPs) and compl
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Morra, Erica, and Lisa Zenker. "Chapter 1: In Search of Innate Leadership : Discovering, Evaluating and Understanding Innateness." Thesis, Linnéuniversitetet, Institutionen för organisation och entreprenörskap (OE), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-34622.

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Every individual is born with different natural competencies that can be honed by both voluntary and involuntary environmental stimuli. The response our genotype decides to make, if any, towards those stimuli, determines how well our competencies develop. Each person’s coding and variations of genes will result in unique qualities in their phenotype, or physical structure. As a result, a person has various traits that are displayed through their behavior. DNA is genetically shown to express itself through traits by up to 75%. This leaves a sort of buffer of around 25%. This region is available
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Kirin, Mirna. "Genetic analysis of retinal traits." Thesis, University of Edinburgh, 2014. http://hdl.handle.net/1842/9619.

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Retina is a unique site in the human body where the microcirculation can be imaged directly and non-invasively, allowing us to study in vivo the structure and pathology of the human microcirculation. Retinal images can be quantitatively assessed with computerized imaging techniques, enabling us to measure several different quantitative traits derived from the retinal vasculature. Arterial and venular calibres are the most extensively studied traits of the retinal microvasculature and numerous epidemiological studies demonstrated promising associations with systemic and ocular diseases as well
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Englishby, Tanya Marie. "Genetic and non-genetic evaluation tools for accelerating improvement in beef cattle carcass traits within and across country." Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/31091.

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The main revenue source for beef cattle farmers is the price they are awarded for carcasses based on carcass value (i.e., carcass weight, conformation and fat score) which is influenced by genetic and environmental factors (e.g., herd management). In order to improve profitability, accurate means of evaluating and improving both sets of factors influencing carcass trait performance are necessary. This would entail optimal management of genetic resources and herd practices. Furthermore, access to a large international germplasm pool would facilitate faster genetic gain. The objective of this th
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Vanimisetti, Hima Bindu. "Genetic evaluation of ewe productivity and its component traits in Katahdin and Polypay sheep." Diss., Virginia Tech, 2006. http://hdl.handle.net/10919/29760.

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The objectives of this dissertation were to evaluate genetic influences on ewe productivity, its growth and reproductive components, and measures indicative of accelerated lambing performance. Genetic parameters were estimated for total weight of litter weaned per ewe lambing (TW) and its components, number of lambs born (NB), number of lambs weaned (NW) and average weight of lambs weaned (AW), measured as traits of the ewe, and lamb survival (LS) and weaning weight (WW), measured as traits of the lamb, in Katahdin sheep. Heritabilities of TW, NB, NW, and AW, were 0.12, 0.12, 0.09, and 0.13, r
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Salfati, Elias Levy Itshak. "Genetic determinants of cardiovascular disease : heritability and genetic risk score." Thesis, Paris 5, 2014. http://www.theses.fr/2014PA05S014/document.

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Les maladies complexes telles que les maladies cardio-Vasculaires (MCV) sont influencées par des facteurs génétiques et environnementaux. L’estimation du risque cardio-Vasculaire chez un individu est généralement évaluée par la sommation des facteurs de risque reconnu des MCV (p. ex. l’âge, le sexe, le tabac, la pression artérielle et le cholestérol). Dernièrement, plusieurs bio-Marqueurs ont été examiné pour leur aptitude à améliorer la prédiction des maladies cardio-Vasculaires au-Delà des facteurs de risques traditionnels. L’intérêt de découvrir de nouveaux loci est incité notamment par les
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Albertsdóttir, Elsa. "Genetic analysis of competition traits in Icelandic horses /." Uppsala : Department of Animal Breeding and Genetics, Swedish University of Agricultural Sciences, 2007. http://epsilon.slu.se/10360486.pdf.

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Pangmao, Santi. "Genetic and Genomic Analysis of Milk Yield, Milk Composition and Lactation Curve Traits of Thai and Australian Dairy Cattle." Thesis, University of Sydney, 2019. https://hdl.handle.net/2123/23514.

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The objective of this thesis is to estimate genetic parameters and discover genes and genomic regions associated with milk yield, lactation curve traits (peak milk yield, days to peak milk yield and persistency) and milk composition (fat and protein percentage) in Thai and Australian dairy cattle. The data on Thai dairy cattle from three government farms were analysed. Cumulative 305- and 100-day milk yield was calculated by the Wood model and an adapted test-interval method. The heritability of 305-day milk yield, peak milk yield and protein percentage had moderate to high estimates ranging f
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Hartman, Carina. "A mixed-model evaluation for growth and reproduction parameters in a SA mutton Merino flock." Diss., Pretoria : [s.n.], 2000. http://upetd.up.ac.za/thesis/available/etd-01242003-092447.

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Lavara, García Raquel. "Genetics of fresh and frozen-thawed semen traits and their relationship with growth rate in rabbits." Doctoral thesis, Universitat Politècnica de València, 2013. http://hdl.handle.net/10251/31657.

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Se utilizarán eyaculados procedentes de machos de la línea R (línea de conejos seleccionada por velocidad de crecimiento durante el periodo de engorde)alojados en diferentes centros de inseminación artificial. Una vez recuperados los eyaculados se procederá a su valoración y una muestra de todos ellos será crioconservada. La calidad seminal será de nuevo valorada tras el proceso de congelación. Junto con los anàlisis seminales se utilizarán los datos de crecimiento y pedigree de los machos y de todos los animales de la línea R desde su fundación para estimar por un lado los parámetros genético
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Radanielson, Mariot Ando. "Identification de nouveaux traits de sélection pour améliorer la productivité en situation de déficit hydrique chez le tournesol." Thesis, Montpellier, SupAgro, 2011. http://www.theses.fr/2011NSAM0013/document.

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Le développement de variétés productives et adaptées aux conditions de déficit hydrique est toujours au cœur du défi de l'amélioration variétale chez le tournesol. Pour une nouvelle orientation de la sélection, ce travail se propose d'identifier de nouvelles cibles phénotypiques au travers d'une démarche couplant le phénotypage écophysiologique, la modélisation biophysique et la génétique quantitative. Les cibles potentielles ont été identifiées sur la base de leur variabilité génotypique, leur impact sur le rendement, leur héritabilité et leur facilité de mesure. Des paramètres génotypiques d
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Oliveira, Elisa Junqueira. "Critérios de seleção para características de importância econômica em ovinos da raça Santa Inês." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/17/17135/tde-05122016-115752/.

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Os objetivos deste estudo foram: estimar parâmetros genéticos para: coloração da conjuntiva ocular (CCO), contagem de ovos por grama de fezes (OPG), volume globular (VG), proteína plasmática total (PPT), escore da condição corporal (ECC) e peso corporal (PC) e, ainda, explorar o perfil genético da população, utilizando análises de agrupamento com base nos valores genéticos. E estimar parâmetros genéticos para peso corporal (PC) e características de conformação (perímetro torácico (PT), altura da garupa (AG), altura da cernelha (AC), largura da garupa (LG), comprimento corporal (CC) e escore de
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FACCHINI, ELENA. "INTEGRATED PHENOTYPIC AND GENETIC ASSESSMENT OF PERFORMANCE TRAITS IN APIS MELLIFERA." Doctoral thesis, Università degli Studi di Milano, 2019. http://hdl.handle.net/2434/627572.

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Honey bees play an important role in modern agriculture as farm animals and crop pollinators and represent an animal model in scientific research. Since few decades, managed honey bees are facing large scale losses worldwide due to the interaction of several biotic and abiotic factors such as the spread of pathogens and parasites, the habitat loss, the use of pesticides, and the occurrence of climate changes. For years, beekeepers have controlled deadly pathogens such as Varroa destructor with acaricides (pyrethroid), but widespread chemical resistance is manifesting. Alternative management st
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Stefaniak, Thomas Richard. "THE INHERITANCE OF COLD TOLERANCE IN A SEEDED BERMUDAGRASS (CYNODON DACTYLON L. PERS.) POPULATION." Lexington, Ky. : [University of Kentucky Libraries], 2008. http://hdl.handle.net/10225/773.

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Thesis (Ph. D.)--University of Kentucky, 2008.<br>Title from document title page (viewed on May 13, 2008). Document formatted into pages; contains: vi, 82 p. : ill. Includes abstract and vita. Includes bibliographical references (p. 76-81).
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Riofrio, Edgar Lenin Aguirre. "Estudo genético quantitativo de uma população de ovelhas Santa Inês." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/74/74135/tde-08032017-101842/.

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É de grande importância estudar o potencial genético da raça Santa Inês, que cada vez mais está ocupando espaço, devido a sua alta resistência e capacidade de adaptação aos diversos ambientes. A informação consistiu de 37.735 dados de pedigree, 11.851 registros fenotípicos de cordeiros que foram usados para o estudo das características de desenvolvimento ponderal e 6.566 registros fenotípicos de 2.211 ovelhas, usados para a avaliação das características de eficiência reprodutiva. O período de análise foi de 12 anos (2003-2014), e as informações pertencentes a 33 rebanhos distribuídos em dez es
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Park, No Hyoung. "Evaluation of serum insulin-like growth factor I (IGF-I) as a physiological predictor of genetic merit in beef cattle : repeatability, heritability and relationship with performance traits /." The Ohio State University, 1993. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487841975359944.

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Kerzienė, Sigita. "Kiaulių reprodukcinių savybių genetinė analizė ir ryšys su produktyvumo požymiais." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2005. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2005~D_20051123_090911-57122.

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Objective of the research - to evaluate, using up-to-date statistical–genetic methods, the reproductive characteristics of pig breeds bred in Lithuania, to determine correlation of the characteristics with productivity traits, and to develop an optimised system of pigs genetic evaluation by BLUP method. Tasks of the research was: to determine influence of genetic and non-genetic factors in pigs reproductive characteristics, to evaluate the additive-genetic heritability parameters, and co-response of reproduction traits; to evaluate influence of reproductive characteristics on productivity trai
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Alves, Anderson AntÃnio Carvalho. "Genetic study â quantitative performance Santa InÃs sheep breed in agricultural fairs." Universidade Federal do CearÃ, 2015. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=16131.

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CoordenaÃÃo de AperfeÃoamento de Pessoal de NÃvel Superior<br>O objetivo no presente estudo foi avaliar a natureza genÃtica da habilidade de um animal se classificar entre os trÃs primeiros colocados em categorias de idade (HAB3) e de sua pontuaÃÃo total obtida (PTO) em campeonatos de julgamento realizados em diferentes exposiÃÃes agropecuÃrias. Foram utilizados dados pertencentes à AssociaÃÃo Brasileira de Santa InÃs (ABSI), referentes a eventos ocorridos entre os anos de 2012 e 2014. Avaliou-se a HAB3 para animais entre 4 e 36 meses, distribuÃdos em 16 categorias, de acordo com sua idade, e
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Ren, Shengjie. "Genetic improvement of the Pacific white shrimp (Penaeus vannamei) in China." Thesis, Queensland University of Technology, 2020. https://eprints.qut.edu.au/200631/1/Shengjie_Ren_Thesis.pdf.

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Farming Pacific white shrimp (Penaeus vannamei) is one of the most important aquaculture industries around the world with China the biggest producer. To date however, this industry relies largely on unimproved stocks. This project represents a step towards genetic improvement of P. vannamei through family selection in China. It examines genetic diversity and relatedness among domesticated culture lines generating information used for producing a base population with broad genetic variation. Subsequent quantitative genetic analyses have shown that growth and several key reproductive traits can
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Fournier, Téo. "Unraveling the genetic architecture of traits in natural yeast populations." Thesis, Strasbourg, 2019. http://www.theses.fr/2019STRAJ073.

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Comprendre les règles contrôlant la diversité entre individus issus d’une même population est l’un des points centraux de la biologie moderne. Récemment, l'avènement des études d’association pan-génomique a permis de lier le génotype au phénotype au sein de populations. Cependant, une part importante de la variance phénotypique reste inexpliquée et est appelée héritabilité manquante. En combinant le modèle d’étude Saccharomyces cerevisiae, un design emprunté à la génétique classique et des stratégies de phénotypage et de génotypage à haut-débit, ce travail a pour objectif d’élargir notre compr
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Herzig, Anthony Francis. "Studying the genetic architecture of complex traits in a population isolate." Thesis, Sorbonne Paris Cité, 2019. http://www.theses.fr/2019USPCC110.

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Mon projet de thèse vise à exploiter le potentiel des isolats de population pour étudier la composante génétique des maladies multifactorielles. En effet, les isolats peuvent faciliter l'identification des facteurs génétiques habituellement trop rares en population générale. Cette thèse est composée de deux études principalement : l'imputation génétique et l'analyse de l'héritabilité. Chacune de ces études ont été abordée sous deux angles : l’un théorique, s’appuyant sur une vaste étude de simulations basée sur les caractéristiques de la population isolée du Cilento, permettant d’évaluer des s
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Dinh, Hung. "Genetic improvement of giant freshwater prawn in Vietnam." Thesis, Queensland University of Technology, 2013. https://eprints.qut.edu.au/61086/1/Hung_Dinh_Thesis.pdf.

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The giant freshwater prawn (Macrobrachium rosenbergii) or GFP is one of the most important freshwater crustacean species in the inland aquaculture sector of many tropical and subtropical countries. Since the 1990’s, there has been rapid global expansion of freshwater prawn farming, especially in Asian countries, with an average annual rate of increase of 48% between 1999 and 2001 (New, 2005). In Vietnam, GFP is cultured in a variety of culture systems, typically in integrated or rotational rice-prawn culture (Phuong et al., 2006) and has become one of the most common farmed aquatic species in
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Beyene, Yoseph Aydagn. "Genetic analysis of traditional Ethiopian Highland Maize (Zea Mays L.) using molecular markers and morphological traits : implication for breeding and conservation." Thesis, University of Pretoria, 2005. http://hdl.handle.net/2263/30529.

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Knowledge of the genetic variation of crop collections is essential for their efficient use in plant breeding programs. The Ethiopian Highland Maize Germplasm Collection Mission was launched throughout the highlands of Ethiopia in 1998 and 287 traditional maize accessions were collected from farmers’ fields. To date, no information was available on the morphological and genetic diversity in this important collection. Various molecular marker techniques and quantitative genetics approaches were applied to accurately unravel the extent of phenotypic and genetic diversity, to study patterns of mo
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Tessmann, Elisane Weber. "Heterose e herdabilidade de caracteres relacionados ao rendimento de grãos em trigo (Triticum aestivum L.)." Universidade Federal de Pelotas, 2013. http://repositorio.ufpel.edu.br/handle/ri/2069.

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Made available in DSpace on 2014-08-20T14:06:13Z (GMT). No. of bitstreams: 1 dissertacao_elisane_weber_tessmann.pdf: 1299023 bytes, checksum: c5038dbcab7cd7e9fc469361c851041e (MD5) Previous issue date: 2013-05-24<br>Wheat is among the most important cereal crops in the world, being significant in the daily diet of large parts of Europe, Americas and Oceania. Brazil is not self-sufficient in this crop, producing less than half of the national demand. Several genetic and environmental factors affect wheat yield. The interaction among genotype and environment results in differential yield res
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Zhang, Han. "Detecting Rare Haplotype-Environmental Interaction and Nonlinear Effects of Rare Haplotypes using Bayesian LASSO on Quantitative Traits." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu149969433115895.

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Daniel, Grégory. "Interaction entre dispersion et syndromes comportementaux : causes et conséquences : approche empirique dans une population fragmentée de passereaux." Thesis, Lyon 1, 2015. http://www.theses.fr/2015LYO10350/document.

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La dispersion est un trait d'histoire de vie clé pour les processus écologiques et évolutifs dans les populations naturelles. Les dernières recherches se sont notamment focalisées sur les corrélations entre traits comportementaux et la dispersion, ceci afin de mettre en évidence des syndromes comportementaux de dispersion, tout en démontrant la base génétique de la dispersion. Les dispersants ne seraient donc pas une part aléatoire d'une population, mais des individus montrant des stratégies particulières qui augmenteraient leur chances de succès. Cette thèse s'est orientée vers trois objectif
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Daniel, Gregory. "Interaction between dispersal and behavioural syndromes - empirical approach in a fragmented population of passerine birds." Doctoral thesis, Uppsala universitet, Institutionen för ekologi och genetik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-267431.

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Dispersal is a key life history trait for ecological and evolutionary processes in wild populations. The latest research has particularly focused on the correlation between behavioural traits and dispersal, in order to emphasize the existence of behavioural syndromes of dispersal, and on the estimation of the genetic basis of the dispersal behaviour. Dispersing individuals are not a random part of the population, but are individuals showing particular strategies, that help them to succeed in their dispersal attempt. This thesis has three main aims of research. The first is to show a genetic ba
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Silva, Roberta Polyana Araujo da. "Influência de características de tipo sobre o intervalo de partos em vacas da raça Holandesa no Sul do Brasil." Universidade do Estado de Santa Catarina, 2011. http://tede.udesc.br/handle/handle/895.

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Made available in DSpace on 2016-12-08T16:24:15Z (GMT). No. of bitstreams: 1 PGCA11MA116.pdf: 1391947 bytes, checksum: 452ae8e6b14145386d67ad7b97589c53 (MD5) Previous issue date: 2011-12-06<br>The genetic improvement programs for dairy cattle give more focus in production traits, with negative consequences in the genetics for functional traits like fertility, longevity and health. Selection for conformation can minimize the negative effects for some characteristics, like the mammary health, with gains on longevity. Farmers and technicians have used selection for conformation, especially rump
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Bontemps, Aurore. "Potentiel évolutif d'une population de hêtre commun sur le Mont Ventoux." Thesis, Aix-Marseille, 2012. http://www.theses.fr/2012AIXM4327.

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L'évolution adaptative contribue probablement à l'adaptation des populations à des changements environnementaux rapides, l'observation empirique de nombreux cas d'évolution rapide dans les populations naturelles suivant de forts changements environnementaux abondant en ce sens. Dans cette thèse, je me suis concentrée sur l'estimation du potentiel évolutif d'une population naturelle de hêtre commun (Fagus sylvatica), une espèce à long cycle de vie, subissant des stress hydriques chroniques. Je considère ici une définition du potentiel évolutif dans le sens strict de la capacité d'une population
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Montalván, Zoila Catalina Rabanal de. "Estimativas de parâmetros genéticos de características reprodutivas de ovinos Santa Inês utilizando inferência Bayesiana." Pós-Graduação em Zootecnia, 2013. https://ri.ufs.br/handle/riufs/6348.

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The objective of this study was to estimate the values of the (co)variance components and genetic parameters for reproductive traits in Santa Inês sheep raised in different states and registered with the Associação Sergipana dos Criadores de Caprinos e Ovinos (Goat and Sheep Breeders Association of Sergipe). The database used was provided by the Association and comprised pedigree observations originating from 11,483 registered individuals, out of which 2,238 were born in the program and had calving records, being part of the relationship matrix. After restriction application, there remained 84
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Chiasson, Marcia. "Phenotypic and genetic evaluation of Fraser strain Arctic charr (Salvelinus alpinus) in brackish and freshwater." Thesis, 2013. http://hdl.handle.net/10214/6313.

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I examined phenotypic and genetic variation in growth traits in 30 families of commercial Fraser strain Arctic charr (Salvelinus alpinus) reared in freshwater (FRW) and brackish water (BRW) in Eastern Canada. I detected family by treatment interactions for all traits [body weight (BW), condition factor (K) and specific growth rate (SGR)] across all measurement dates and growth intervals, however, mean family BW in FRW was correlated phenotypically with BRW BW. In addition, FRW fish showed significantly greater survival than those transferred to BRW and fish which survived until the conclusion
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Lühmann, Liane-Magdalena. "Quantitative and molecular genetic studies on temperature-dependent sex determination of Nile tilapia (Oreochromis niloticus)." Doctoral thesis, 2012. http://hdl.handle.net/11858/00-1735-0000-000D-EF3C-C.

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