Sökning: "inbreeding"

Visar resultat 1 - 5 av 53 avhandlingar innehållade ordet inbreeding.

  1. 1. Dispersal, inbreeding and fitness in natural populations

    Detta är en avhandling från Bengt Hansson, Ecology Building, 223 62 Lund, Sweden

    Författare :Bengt Hansson; [2003]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; immigration; inbreeding; inbreeding depression; heterozygosity; microsatellite; great reed warbler; bird; Djurekologi; Animal ecology; philopatry; heritability; founder event; dispersal; bottleneck;

    Sammanfattning : To evaluate how inbreeding affects the viability of small populations, it is crucial to determine what constitutes a population (i.e., the number of breeders in local patches and the degree of dispersal), and also to estimate the reproductive consequences of philopatry and emigration. LÄS MER

  2. 2. The role of Assortative Mating in the Initial Stages of Sympatric and Parapatric Speciation

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Emma Rova; Uppsala universitet.; [2010]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Callosobruchus maculatus; host fidelity; assortative mating; inbreeding; experimental evidence; sympatric speciation; parapatric speciation; NATURAL SCIENCES Biology; NATURVETENSKAP Biologi; Biologi med inriktning mot zooekologi; Biology with specialization in Animal Ecology;

    Sammanfattning : Divergence in the face of gene flow is perhaps the most wildly disputed subject among researchers through time. The debate is an old one and we find its origin as far back as the era of Darwin. LÄS MER

  3. 3. Genetic variation and sexual reproduction in a moss with dwarf males, Homalothecium lutescens

    Detta är en avhandling från Department of Biology, Lund University

    Författare :Frida Rosengren; [2015]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; bryophytes; mosses; dwarf males; sexual reproduction; genetic variation; genetic structure; inbreeding; isozymes; allozymes; SNP; sporophytes; spore; fertilization; fertility;

    Sammanfattning : Dwarf males occur in many unrelated groups of organisms. Among land plants they are unique to mosses. Moss dwarf males originate from male spores that land and germinate on the female where their final size is restricted to a few mm. Fertilization in mosses occur over short distances with swimming spermatozoids. LÄS MER

  4. 4. Reproductive Biology and Population Genetics of Common Ash (Fraxinus excelsior L.)

    Detta är en avhandling från Department of Biology, Lund University

    Författare :Grazyna Bochenek; Göteborgs universitet.; Gothenburg University.; [2011]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Fraxinus excelsior; delayed fertilization; functional dioecy; gender-related grow difference; inbreeding; tree-rings; non random mating; wind-pollination;

    Sammanfattning : Common Ash, Fraxinus excelsior L. (Oleaceae) is a wind-pollinated, wind-dispersed, deciduous tree, commonly occurring throughout Central and Northern Europe. The thesis addresses several questions concerning reproductive biology and factors influencing the genetic richness of ash stands. LÄS MER

  5. 5. Island biogeography and population divergence in the Skyros wall lizard

    Detta är en avhandling från Department of Biology, Lund University

    Författare :Anna Runemark; [2012]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Podarcis gaigeae; inbreeding; predation release; polymorphism; island gigantism; the island rule; genetic drift; sexual selection; natural selection; island biology; Evolution;

    Sammanfattning : Islands are cradles for new biodiversity and provide natural laboratories for the study of population divergence. In my thesis, I investigated the role of different evolutionary processes in the population divergence in the Skyros wall lizard (Podarcis gaigeae), a species where islet populations have strongly diverged morphologies. LÄS MER