Sökning: "MATING SYSTEM"

Visar resultat 16 - 20 av 63 avhandlingar innehållade orden MATING SYSTEM.

  1. 16. On the Evolution of Reproductive Systems in Neurospora

    Författare :Rebecka Strandberg; Hanna Johannesson; Paul Dyer; Uppsala universitet; []
    Nyckelord :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;

    Sammanfattning : 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. LÄS MER

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

    Författare :Le Yu; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : 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. LÄS MER

  4. 18. Contributions to the understanding of diversity and evolution in the genus Coreomyces

    Författare :Henrik Sundberg; Stefan Ekman; Åsa Kruys; Donald H. Pfister; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; ascomycetes; Coreomyces; Corixidae. DNA; DNA extraction; Fungi; ge-nome; host specificity; Laboulbeniales; mating types; MAT-loci; meth-odology; NGS; parasite; position specificity; systematics; taxonomy; Biology with specialization in Systematics; Biologi med inriktning mot systematik; Biology with specialization in Evolutionary Organismal Biology; Biologi med inriktning mot evolutionär organismbiologi;

    Sammanfattning : The Laboulbeniales is an order of enigmatic ascomycete fungi that are obligate microscopic parasites of arthropods, which are usually non-detrimental. They typically display a high degree of host specificity, and the genus Coreomyces, which is the recurring theme of this thesis, is no exception. LÄS MER

  5. 19. Mating structure and nestmate relatedness in primitively social hymenoptera as revealed by microsatellites

    Författare :Peter A. Thorén; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Genetics; Genetik; Clinical genetics; Klinisk genetik; Genetics; genetik;

    Sammanfattning : Mating structure and nestmate relatedness have been estimated in social Hymenoptera with different levels of sociality. Microsatellite markers have been developed for both communal bees (Andrena scottica) and for primetively eusocial wasps (Vespula rufa). LÄS MER

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

    Författare :Grazyna Bochenek; Göteborgs universitet; []
    Nyckelord :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