Sökning: "Darwin’s finches"

Hittade 4 avhandlingar innehållade orden Darwin’s finches.

  1. 1. Genetic Adaptation and Speciation in Darwin’s Finches and Atlantic Herring

    Författare :Fan Han; Leif Andersson; Kjetill Sigurd Jakobsen; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Darwin s finches; Atlantic herring; Population genetics; Evolution; Ecological adaptation; Speciation; Biologi med inriktning mot zooekologi; Biology with specialization in Animal Ecology; Bioinformatics; Bioinformatik;

    Sammanfattning : Natural selection acts on existing genetic variation to drive genetic adaptation of organisms to various ecological niches. Interaction between closely related populations, through processes such as competition and hybridization, may either lead to their divergence or population fusion, which has consequences for adaptation and the formation of species. LÄS MER

  3. 2. The genetic basis for adaptation in natural populations

    Författare :Sangeet Lamichhaney; Leif Andersson; Carl-Johan Rubin; Alvaro Martinez Barrio; Henrik Kaessmann; Uppsala universitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; Adaptive evolution; Atlantic herring; ecological adaptation; seasonal reproduction; TSHR; Darwin’s finches; natural selection; beak; ALX1; HMGA2; ruff; lek; inversion; HSD17B2; MC1R;

    Sammanfattning : Many previous studies in evolutionary genetics have been based on few model organisms that can be reared at ease in the laboratory. In contrast, genetic studies of non-model, natural populations are desirable as they provide a wider range of adaptive phenotypes throughout evolutionary timescales and allow a more realistic understanding of how natural selection drives adaptive evolution. LÄS MER

  4. 3. Dynamics and evolutionary significance of variation in a population of Darwin's finches, Geospiza conirostris

    Författare :Rosemary Grant; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP;

    Sammanfattning : .... LÄS MER

  5. 4. On Speciation in Birds – Genomic Signatures across Space and Time

    Författare :Martin Stervander; MEMEG; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; colonization; islands; isolation; introgressive hybridization; sympatry; natural selection; bill morphology; coalescence-based analyses; DNA sequencing; birds; divergence; Speciation;

    Sammanfattning : The process of speciation is a cornerstone in evolutionary biology. In Darwin’s On the Origin of Species, he described how he imagined that a new species would evolve to fill an empty niche. This focus on ecology shifted with Mayr towards the importance of isolation, and for many decades the geographic modes of speciation were debated. LÄS MER