Search for dissertations about: "mating type"

Showing result 6 - 10 of 41 swedish dissertations containing the words mating type.

  2. 6. Mating behaviour in Drosophila melanogaster and its implication to genetic variation

    Author : Sven-Eric Åslund; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; drosophila melanogaster; mating behaviour; fitness; allozymes; bristles; Y chromosome; polymorphism; selection;

    Abstract : Not much is known about the mechanisms affecting the genetic composition of populations of different species. To investi­gate one of these potential mechanisms, mating behaviour, the fruit fly Drosophila melanogaster, was chosen as an experimen­tal animal. READ MORE

  4. 7. 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

  5. 8. Setosphaeria turcica, fungal mating and plant defence

    Author : Thomas Martin; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : The heterothallic ascomycete Setosphaeria turcica (anamorph: Exserohlium turcicum) causes turcicum leaf blight on maize and sorghum. A survey was undertaken in Uganda to examine the sorghum – S. turcica interaction in terms of disease severity and incidence, overall fungal population structure, and new resistant resources. READ MORE

  6. 9. Sex and violence in lobsters - a smelly business

    Author : Malin Skog; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; dominance; urine signals; recognition; Aggressive behaviours; intermoult mating; sexual dimorphism; European lobster; chemical communication; Homarus gammarus; aesthetasc morphology;

    Abstract : The aim of this thesis was to study the chemical communication involved in aggressive and reproductive behaviours in the European lobster (Homarus gammarus). Both male and female H. gammarus established and maintained dominance, but the sexes used different strategies for dominance maintenance. READ MORE

  7. 10. Hybrid zones and speciation – insights from the European crow hybrid zone

    Author : Fredrik Haas; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; microsatellites; mc1r; introgression; hybrid zone; speciation; European crow; Corvus corone; habitat preferences; neural network; sexual imprinting; assortative mating;

    Abstract : In hybrid zones genetically differentiated populations meet and interbreed. As they result from ongoing divergence and potential speciation, such zones provide opportunities to study how different factors affect this process. The hybrid zone between the all black carrion crow (Corvus corone corone) and the grey and black hooded crow (Corvus c. READ MORE