Sökning: "Avian gene expression"

Visar resultat 1 - 5 av 18 avhandlingar innehållade orden Avian gene expression.

1. 1. Avian Genome Evolution - Gene Expression, Gene Divergence and Sexual Dimorphism

   Författare :Sara Naurin; Biologiska institutionen; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; sex chromosome; avian genome evolution; gene expression; sexual dimorphism; Z chromosome;

   Sammanfattning : This study has focused on: (i) differences in how males and females use the genes in the genome, (ii) how sex chromosomes evolve and (iii) how the evolutionary rate of genes are affected by the chromosome on which they are located on and the gene expression level they experience. A large-scale microarray was developed for the zebra finch, Taeniopygia guttata and techniques were developed so that this microarray could also be used for wild passerine birds. LÄS MER

3. 2. Eco-immunological studies of innate immunity in Mallards (Anas platyrhynchos)

   Författare :Anu S. Helin; Jonas Waldenström; Edwin Veldhuizen; Linnéuniversitetet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Avian β-defensins AvBDs ; Avian gene expression; Host-pathogen interactions; Innate immunity; Mallard Anas platyrhynchos ; Myxovirus resistance gene Mx ; Retinoic acid inducible gene 1 RIG-I ; Avian β-defensins AvBD ; Genuttryck; Gräsand Anas platyrhynchos ; Immunförsvar; Immungener; Myxovirus resistant gene Mx ; Patogen; Retinoic acid inducible gene 1 RIG-I ; Ecology; Ekologi;

   Sammanfattning : This thesis comprises two sections, both of which explore eco-immunology of the innate immune system of mallards (Anas platyrhynchos). The innate immune system serves a pivotal role as the first line of defense against invading pathogens, and is comprised of physical and chemical barriers. LÄS MER

4. 3. On the Evolution of the Avian Transcriptome

   Författare :Severin Uebbing; Hans Ellegren; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; evolution; gene expression; regulation; RNA-seq; transcriptomics; proteomics; sex chromosome; dosage compensation; divergence; ASE; birds; Ficedula; flycatcher; chicken; Biology with specialization in Evolutionary Genetics; Biologi med inriktning mot evolutionär genetik;

   Sammanfattning : Change in gene expression is a powerful tool for evolution, because seemingly small expression changes can contribute important steps towards adaptation without necessarily affecting the whole organism. There is still much to learn about how gene expression evolves on genome- and population-wide levels, especially in non-model organisms. LÄS MER

5. 4. Avian MHC : Characterization and expression patterns of classical and non-classical MHC-I genes

   Författare :Anna Drews; MEMEG; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; MCH class I; Classical genes; Non-classical genes; Expression; Passerine birds;

   Sammanfattning : The function of the vertebrate immune system is to enable recognition and elimination of microorganisms that can cause harm (pathogens). A key component in adaptive immunity is the major histocompatibility complex (MHC) that codes for molecules with antigen presentation function. LÄS MER

7. 5. Genomic and Peptidomic Characterization of the Developing Avian Brain

   Författare :Birger Scholz; Lennart Dencker; Eric Vilain; Uppsala universitet; []
   Nyckelord :Toxicology; Sex differentation; Sex determination; Sex chromosomes; Dosage Compensation; Genetic; Chickens; Coturnix; Gene Expression Profiling; Neuropeptides; Diencephalon; Toxikologi;

   Sammanfattning : Chicken and Japanese quail are commonly used models in developmental and sex specific neuroendocrine research. There is relatively little known about the mechanisms behind their sex specific brain development, especially regarding the impact of the sex chromosomes (male: ZZ, female ZW) in relation to gonadal hormones. LÄS MER