Sökning: "genotype by environment interaction"

Visar resultat 1 - 5 av 24 avhandlingar innehållade orden genotype by environment interaction.

1. 1. Genotype by environment interaction for automated and traditional fertility traits in dairy cattle

   Författare :Ahmed Ismael; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
   Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

   Sammanfattning : Genotype by environment interaction (G×E) is one of the issues the dairy farming industry faces due to the globalization of using artificial insemination with genetically superior bulls to improve the performance of their herds. This includes distribution of genetic material to multiple environments within countries and between countries. LÄS MER

3. 2. Organic dairy production : herd characteristics and genotype by environment interactions

   Författare :Therese Ahlman; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
   Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

   Sammanfattning : The aim of this thesis was to gain further knowledge about the performance of cows in organic dairy production and their ability to adapt to the organic production environment. Milk production traits, fertility traits, somatic cell count (SCC) and longevity traits were analysed in organic and conventional herds and the reasons for culling in the two systems were investigated. LÄS MER

4. 3. Interaction of genetic susceptibility and traffic-related air pollution in cardiovascular disease

   Författare :Anna Levinsson; Göteborgs universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Cardiovascular disease; genetic variants; air pollution; gene-environment interaction;

   Sammanfattning : This thesis aimed at investigating gene-environment interaction in cardiovascular disease (CVD). A study population of 618 coronary heart disease (CHD) cases (of which 192 first-time acute myocardial infarction (AMI) patients) and 3614 randomly selected population controls was genotyped for genetic variants in genes coding for nitric oxide synthase (NOS) and glutathione s-transferase (GST). LÄS MER

5. 4. Sexual selection in the collared flycatcher (Ficedula albicollis) : A life-history perspective

   Författare :Anna Qvarnström; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ecology; Sexual selection; life-history; honest signalling; fighting ability; genotype-environment interaction; direct benefits; indirect benefits; Ekologi; Terrestrial; freshwater and marine ecology; Terrestisk; limnisk och marin ekologi; Animal Ecology; zooekologi;

   Sammanfattning : This thesis integrates sexual selection theory with life history theory to elucidate the causes and consequences of variation in a male secondary sexual trait. The model organism, the collared flycatcher (Ficedula albicollis), was studied on Gotland, Sweden. LÄS MER

7. 5. Understanding the genetic basis of complex traits

   Författare :Yanjun Zan; Örjan Carlborg; Pär Ingvarsson; Uppsala universitet; []
   Nyckelord :genetic architecture; complex traits; epistasis; multi-allelic; genotype by environment interaction; polygenic adaptation; Biology with specialization in Evolutionary Genetics; Biologi med inriktning mot evolutionär genetik;

   Sammanfattning : Recent advances in genetics and genomics have provided numerous opportunities to study the genetic basis of complex traits. Nevertheless, dissecting the genetic basis of complex traits is still challenged by the complex genetic architecture, in which many genes are involved, and many have small contributions to phenotypic variation, interactions with other genes or environmental factors. LÄS MER