Sökning: "genetic difference"

Visar resultat 1 - 5 av 344 avhandlingar innehållade orden genetic difference.

  1. 1. Tracing Wolves : Materiality, Effect and Difference

    Författare :Andrew Mitchell; Mark Graham; Bengt G. Karlsson; Samantha Hurn; Stockholms universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Wolf; trace; materiality; effect; difference; transspecies; post-human; material-semiotic; human-animal; socialantropologi; Social Anthropology;

    Sammanfattning : As wolves are seldom seen in Scandinavia, Tracing Wolves utilises the ‘trace’ as both a theoretical and methodological tool to aid comprehension of what a wolf is and what a wolf does. Consequently, this enquiry examines human-wolf practices, such as tracking, genetic analysis, GPS tracking, hunting, and wolf necropsies, via which Scandinavian wolves in Sweden manifest. LÄS MER

  3. 2. Genetic Heteroscedasticity for Domestic Animal Traits

    Författare :Majbritt Felleki; Erling Strandberg; Lars Rönnegård; Ole Fredslund Christensen; Högskolan Dalarna; Sveriges lantbruksuniversitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; Quantitative genetics; genetic heteroscedasticity of residuals; genetic heterogeneity of environmental variation; genetic heterogeneity of residual variance; double hierarchical generalized linear models; teat count in pigs; litter size in pigs; milk yield in cows; somatic cell count in cows; Complex Systems – Microdata Analysis; Komplexa system - mikrodataanalys;

    Sammanfattning : Animal traits differ not only in mean, but also in variation around the mean. For instance, one sire’s daughter group may be very homogeneous, while another sire’s daughters are much more heterogeneous in performance. The difference in residual variance can partially be explained by genetic differences. LÄS MER

  4. 3. Genetic diversity and differentiation in natural and managed stands of Norway spruce (Picea abies)

    Författare :Helena Eklöf; Pär K. Ingvarsson; Xiao-Ru Wang; Carolina Bernhardsson; Katri Kärkkäinen; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Norway spruce; Picea abies; forestry; genetic diversity; seed orchards; forest management; WGS; GBS; sequencing; PoolSeq; capture probes; genetic differentiation;

    Sammanfattning : Being one of Sweden’s most important tree species, both as a keystone species and for the forest industry, it is important that we keep our stands of Norway spruce (Picea abies (L.) Karst.) as healthy as possible. LÄS MER

  5. 4. Hybrid sterility and genetic incompatibilities in Ficedula flycatchers

    Författare :Carolina Segami; Anna Qvarnström; Scott Edwards; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Speciation; genetic incompatibilities; hybrid sterility; hybrid inviability; single-cell RNA seq; GRC; Ficedula; flycatcher; intrinsic post-zygotic isolation; BDMI;

    Sammanfattning : Although the theory behind the mechanisms generating intrinsic post-zygotic isolation is well established, very few concrete examples of genetic incompatibilities have been described, especially in vertebrates. Consequently, our understanding of the evolutionary forces shaping the appearance of genetic incompatibilities between natural populations and the overall role of genetic incompatibilities in the speciation process is limited. LÄS MER

  7. 5. Characterisation of social behaviour in red junglefowl and White leghorn laying hens : phenotypic and genetic studies

    Författare :Johanna Väisänen; Harry Blokhuis; Linköpings universitet; []
    Nyckelord :Red junglefowl; social behaviour; behaviour tests; NATURAL SCIENCES; NATURVETENSKAP;

    Sammanfattning : The objective of this thesis was, by using two model strains of chicken, red junglefowl and White Leghorn layer, to study differences in social behaviour of the species that could be derived from domestication and production related selection processes. The social phenotype characterisation was done to be able to further study the association of the social differences to specific production related traits as well as to certain genome areas in intercross and backcross lines generated from these two parental populations. LÄS MER