Search for dissertations about: "Non-random mating"

Showing result 1 - 5 of 7 swedish dissertations containing the words Non-random mating.

  2. 1. Pollen Competition as a Target for Sexual Selection in Plants

    Author : Åsa Lankinen; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Sexual selection; Pollen tube growth rate; Pollen selection models; Pollen interactions; Pollen competition; Plants; Phenotypic plasticity; Non-random mating; Genotype by environment interactions; Mate choice; Viola tricolor.; Plant ecology; Växtekologi;

    Abstract : According to the theory of sexual selection, traits can evolve because they confer a mating advantage in competition with members from the same sex. In animals, sexual selection is considered as an important evolutionary force. In this thesis I have investigated the potential for sexual selection in plants. READ MORE

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

    Author : Grazyna Bochenek; Göteborgs universitet; []
    Keywords : Fraxinus excelsior; delayed fertilization; functional dioecy; gender-related grow difference; inbreeding; tree-rings; non random mating; wind-pollination;

    Abstract : 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. READ MORE

  5. 3. Genetic Structuring and the Evolution of Lekking Behaviour in the White-bearded Manakin, Manacus manacus

    Author : Lisa Shorey; David McDonald; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Biology; Lek Evolution; Manacus manacus; White-bearded Manakin; Genetic Relatedness; Mating Success; Male Characteristics; Behaviour; Biologi; Biology; Biologi; populationsbiologi; Population Biology;

    Abstract : Genetic structuring is common in natural populations. It is important to identify and consider population structure when studying evolutionary processes. Recently, the discovery of genetic structuring in some lekking bird species has opened up new perspectives on our understanding of the evolution of lek mating systems. READ MORE

  6. 4. Population genetic analyses in the orchid genus Gymnadenia : a conservation genetic perspective

    Author : Susanne Gustafsson; Pia Mutikainen; Uppsala universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Genetic engineering; Orchidaceae; Gymnadenia; conservation; microsatellites; genetic structure; mating pattern; Genteknik; Genetic engineering including functional genomics; Genteknik inkl. funktionsgenomik; naturvårdsbiologi; Conservation Biology;

    Abstract : Small populations are facing a particular risk of extinction due to a lack of appropriate genetic diversity and associated negative effects, factors dealt with in the discipline of conservation genetics. Many orchid species exhibit characteristics that make them a perfect study object in the scope of conservation genetics. READ MORE

  7. 5. Functional organisation of the cell nucleus in the fission yeast, Schizosaccharomyces pombe

    Author : Jenny Alfredsson Timmins; Pernilla Bjerling; Wendy Bickmore; Uppsala universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; fission yeast; heterochromatin; subnuclear organisation; chromo domain proteins; boundary elements; transcriptional regulation; epigenetics; Molecular biology; Molekylärbiologi; Cell and molecular biology; Cell- och molekylärbiologi; Genetics; Genetik; Molecular Biology; molekylärbiologi; Genetics; genetik;

    Abstract : In eukaryotes the genome adopts a non-random spatial organisation, which is important for gene regulation. However, very little is known about the driving forces behind nuclear organisation. READ MORE