Sökning: "evolutionär genetik"

Visar resultat 1 - 5 av 58 avhandlingar innehållade orden evolutionär genetik.

  1. 1. Effects of Selection and Demography on DNA Polymorphism in Black Mustard (Brassica nigra)

    Författare :Per Sjödin; Martin Lascoux; Ulf Lagercrantz; Mikkel Schierup; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Molecular genetics; population genetics; Genetik; Genetics; Genetik;

    Sammanfattning : The evolution of three genes from the CONSTANS-LIKE gene family is studied in Brassica nigra. We use a combination of population genetic and phylogenetic techniques in order to assess the relative importance of selection and demography on the pattern of DNA variation. LÄS MER

  2. 2. Evolution of MHC Genes and MHC Gene Expression

    Författare :Karin Berggren Bremdal; Hans Ellegren; Jennifer Seddon; Philip Hedrick; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; major histocompatibilty complex; dog leukocyte antigen; balancing selection; linkage disequilibrium; promoter; diabetes mellitus; Canis familiaris; Canis lupus; Erinaceus europaeus; Erinaceus concolor; Genetics; Genetik; Biology with specialization in Evolutionary Genetics; Biologi med inriktning mot evolutionär genetik;

    Sammanfattning : Polymorphism in coding regions and regions controlling gene expression is the major determinant of adaptive differences in natural populations. Genes of the major histocompatibility complex (MHC) possess a high level of genetic variation, which is maintained by selection over long coalescence times. LÄS MER

  3. 3. Patterns and Processes of Evolution in Sundaland

    Författare :Robert-Jan den Tex; Jennifer A. Leonard; Lawrence R. Heaney; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; Biology; Biologi; Systematics and phylogenetics; Systematik och fylogeni; Genetics; Genetik; Biology with specialization in Evolutionary Genetics; Biologi med inriktning mot evolutionär genetik;

    Sammanfattning : Biodiversity in the tropics is disproportionately high compared to other habitats, and also under disproportionate threat from human impact. It is necessary to understand how this diversity evolved and how it is partitioned across space in order to preserve it. LÄS MER

  4. 4. Detecting Sex and Selection in Ancient Cattle Remains Using Single Nucleotide Polymorphisms

    Författare :Emma M Svensson; Anders Götherström; Juha Kantanen; Uppsala universitet; []
    Nyckelord :HUMANITIES; HUMANIORA; NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; HUMANIORA; NATURAL SCIENCES; HUMANITIES; aurochs; cattle; ancient DNA; SNP; pyrosequencing; selection; Bos taurus; Historical osteology; Historisk osteologi; Genetics; Genetik; Biology with specialization in Evolutionary Genetics; Biologi med inriktning mot evolutionär genetik;

    Sammanfattning : All contemporary taurine cattle originated some 10,000 years ago when their wild ancestor, the aurochs, was domesticated in the Near East. Although the aurochs was widespread also in Europe, there is no evidence for a local domestication. The aurochs has been extinct since 1627 and therefore little is known about its biology. LÄS MER

  5. 5. The balance between sex and asex: evolutionary genetic studies of reproductive variation in Allium vineale

    Författare :Alf Ceplitis; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; ontogeny; growth animal ; Allium vineale; Development biology; evolution; sexual reproduction; reproductive systems; embryology; Utvecklingsbiologi; ontogeni; embryologi; Genetics; cytogenetics; Genetik; cytogenetik;

    Sammanfattning : Evolutionary theory predicts a disadvantage to sexual reproduction. This manifests itself either by the higher growth rate of asexual females in a dioecious species, or by the higher transmission rate of a gene conferring asexual female function to its carriers in a hermaphrodite species. LÄS MER