Search for dissertations about: "mating systems"

Showing result 1 - 5 of 28 swedish dissertations containing the words mating systems.

  2. 1. Butterfly life history and mating systems

    Author : Virpi Sjöberg Lindfors; Göran Arnqvist; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; zoologisk ekologi; Animal Ecology;

    Abstract : The general hypothesis tested in this thesis is whether butterfly mating strategies are affected by their life history. Several components of mating behaviour, morphological and physiological traits were studied and related to various life histories. Male and female interests are often in conflict. READ MORE

  4. 2. On the Evolution of Reproductive Systems in Neurospora

    Author : Rebecka Strandberg; Hanna Johannesson; Paul Dyer; Uppsala universitet; []
    Keywords : Neurospora; mating type; pheromone receptor; phylogeny; gene expression; heterothallism; homothallism; pseudohomothallism; alternative splicing; Biology with specialization in Evolutionary Genetics; Biologi med inriktning mot evolutionär genetik;

    Abstract : The aim of this thesis was to study the evolution of reproductive systems and reproductive traits in the fungal genus Neurospora. More specifically, I have investigated the evolutionary forces shaping the genes involved in sexual reproduction, focusing on mating-type (mat) and pheromone receptor (pre) genes. READ MORE

  5. 3. Adaptation in two species of Phaseolus with contrasting mating systems

    Author : Le Yu; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : For common bean, the loss of photoperiod sensitivity has been a major pre-requisite for domestication and further adaptation to European climates. Its self-pollinated mating system also makes it a good model for identifying genes that display enhanced levels of differentiation in gene expression, together with its closely related species, open-pollinated runner bean. READ MORE

  6. 4. Selection and Floral Evolution in Platanthera bifolia and P. chlorantha (Orchidaceae)

    Author : Johanne Maad; Charles B. Fenster; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Developmental biology; Evolution; phenotypic selection; male function hypothesis; mating systems; floral shifts; orchids; pollination; moth pollinators; Platanthera.; Utvecklingsbiologi; Developmental biology; Utvecklingsbiologi; systematisk botanik; Systematic Botany;

    Abstract : Natural selection mediated by pollinators has influenced the evolution of floral diversity of the flowering plants (angiosperms). The scope of this thesis was to study: 1) phenotypic selection, 2) mating systems, and 3) floral shifts involved in plant speciation. Model plant species were Platanthera bifolia and P. chlorantha (Orchidaceae). READ MORE

  7. 5. Mating system evolution and self-incompatibility in the wild plant species Brassica cretica

    Author : Kristina Aaltonen; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; mating system; Brassicaceae; Brassica cretica; recombination; frequency-dependent selection; evolution; population structure; segregation distortion; SCR; self-incompatibility; SRK;

    Abstract : Compared to animals like ourselves, plants have a very flexible sexual life. Most plants are, for example, hermaphrodites with the potential capacity for reproduction by self-fertilization (or selfing). READ MORE