Search for dissertations about: "sterility"

Showing result 1 - 5 of 25 swedish dissertations containing the word sterility.

2. 1. Hybrid sterility and genetic incompatibilities in Ficedula flycatchers

   Author : Carolina Segami; Anna Qvarnström; Scott Edwards; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Speciation; genetic incompatibilities; hybrid sterility; hybrid inviability; single-cell RNA seq; GRC; Ficedula; flycatcher; intrinsic post-zygotic isolation; BDMI;

   Abstract : Although the theory behind the mechanisms generating intrinsic post-zygotic isolation is well established, very few concrete examples of genetic incompatibilities have been described, especially in vertebrates. Consequently, our understanding of the evolutionary forces shaping the appearance of genetic incompatibilities between natural populations and the overall role of genetic incompatibilities in the speciation process is limited. READ MORE

4. 2. A quality system for medical devices : the sterility property

   Author : Jan Rohlén; Göteborgs universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES;

   Abstract : .... READ MORE

5. 3. Nuclear-cytoplasmic male sterility and populaton dynamics in Plantago maritima

   Author : Patrik Dinnétz; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Gulkämpar; växtfysiologi;

   Abstract : .... READ MORE

6. 4. Breeding System Evolution and Pollination Success in the Wind-Pollinated Herb Plantago maritima

   Author : Emil Nilsson; Jon Ågren; Pia Mutikainen; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Biology; Breeding system; mating system; gynodioecy; male sterility; reproductive output; self-compatibility; self-incompatibility; wind-pollination; founder event; genetic structure; Biologi; Biology; Biologi; ekologisk botanik; Ecological Botany;

   Abstract : In this thesis, I examined variation in sex expression and mating patterns in the sexually polymorphic, wind-pollinated herb Plantago maritima. With a combination of field studies, greenhouse experiments, and genetic analyses, I (a) examined factors influencing sex ratio variation in gynodioecious plants (in which hermaphrodites and females coexist), (b) discovered variation in breeding system, (c) investigated density-dependence of seed production, and (d) documented genetic variation within and among populations close to the northern range margin in Europe. READ MORE

7. 5. Clonal structure and reproductive biology in the gynodioecious herb Glechoma hederacea L. Lamiaceae

   Author : Marie Widén; Biologiska institutionen; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Systematisk botanik; chemotaxonomy. Physiology of nonvascular plants; phytogeography; morphology; taxonomy; Systematic botany; clonal structure; isoloci; disomic inheritance; genetic diversity; polyploidy; male sterility; sex expression; pollen limitation; sexual reproduction; gynodioecy; Glechoma hederacea; Lamiaceae; taxonomi; morfologi; kemotaxonomi. Växters fysiologi inte kärlväxter .;

   Abstract : Clonal structure and reproductive biology in the gynodioecious herb Glechoma hederacea L. Lamiaceae The frequencies of females, hermaphrodites and partially male-sterile (PMS) genets of Glechoma hederacea were estimated in natural populations in S Sweden. The frequency of females and PMS genets in natural populations varied from 0 to 100%. READ MORE