Sökning: "History of genetics"

Visar resultat 6 - 10 av 150 avhandlingar innehållade orden History of genetics.

  1. 6. The Effects of Mutation and Selection on the Rate and Pattern of Molecular Evolution in Birds

    Författare :Sofia Berlin; Hans Ellegren; Adam Eyre-Walker; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Molecular genetics; substitution rate; diversity; selection; male mutation bias; birds; Genetik; Genetics; Genetik;

    Sammanfattning : By comparing sequence diversity and divergence on sex chromosomes one can study how the rate of evolution in affected by mutation and/or selection. The rate of mutation in male biased, meaning that relatively more mutations are created in the male germ line than in the female. LÄS MER

  2. 7. Following the herd : Population genetics of European sheep in time and space

    Författare :Pedro Morell Miranda; Torsten Günther; Mattias Jakobsson; Daniel G. Bradley; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; HUMANIORA; HUMANITIES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; Sheep; Population Genetics; Ancient DNA; Wool; Demography; Wool; Mouflon;

    Sammanfattning : Sheep, which were domesticated in the Fertile Crescent about 10,000-12,000 years ago, have been a key resource for human populations ever since. We, however, know little about how they were domesticated, and what happened to them after their initial expansion from their domestication area into all corners of Eurasia and later Africa and the Americas. LÄS MER

  3. 8. Genome Divergence in Progress - a population genetic analysis of the allopolyploid Arabidopsis suecica and its maternal parent A. thaliana

    Författare :Mattias Jakobsson; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; cytogenetik; Genetik; cytogenetics; Genetics; sequence polymorphism; microsatellites; population structure; polyploidy; single origin; Arabidopsis thaliana; Arabidopsis suecica; genome evolution; evolutionary history; Plant genetics; Växtgenetik;

    Sammanfattning : The evolutionary history of the allotetraploid Arabidopsis suecica and its maternal parent Arabidopsis thaliana is analyzed in the thesis in terms of genetic variation in the natural populations of the two species. The earliest phase of the speciation event in which the genomes of A. thaliana and A. LÄS MER

  4. 9. Inferring demographic history and speciation of grouse using whole genome sequences

    Författare :Radoslav Kozma; Jacob Höglund; Jeff A. Johnson; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Demographic history; speciation; effective population size; adaptation; willow grouse; red grouse; black grouse; rock ptarmigan; Tetraoninae; conservation genetics; climate change; PSMC; species distribution modelling; FOXP4; Agouti;

    Sammanfattning : From an ecological perspective, knowledge of demographic history is highly valuable because population size fluctuations can be matched to known climatic events, thereby revealing great insight into a species’ reaction to past climate change. This in turn enables us to predict how they might respond to future climate scenarios. LÄS MER

  5. 10. From the migrations of herders and farmers to the colonial era and the modern-day : Genetic inferences on African demographic history

    Författare :Rickard Hammarén; Mattias Jakobsson; Carina Schlebusch; Torsten Günther; Luca Pagani; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; admixture; African demography; human evolutionary genetics; population structure; sex-biased admixture; Africa; population genetics; Biology with Specialisation in Human Evolution and Genetics; Biologi med inriktning mot människans evolution och genetik;

    Sammanfattning : Africa is the birthplace of the human species and home to great linguistic, cultural, and genetic diversity. Despite this, the genetics of the peoples of the continent remains understudied. In this thesis, I apply population genetic approaches, to contribute to the knowledge of human demographic history in Africa. LÄS MER