Search for dissertations about: "self-incompatibility"
Showing result 1 - 5 of 8 swedish dissertations containing the word self-incompatibility.
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1. Evolutionary consequences of dominance at the Brassicaceae self-incompatibility locus
Abstract : Self-incompatibility (SI) is a genetic mechanism that allows plants to enforce outcrossing by rejecting self-pollen and pollen from close relatives. In the Brassicaceae, SI is sporophytic and controlled by the self-incompatibility locus (S-locus). READ MORE
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2. Mating system evolution and self-incompatibility in the wild plant species Brassica cretica
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
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3. Breeding System Evolution and Pollination Success in the Wind-Pollinated Herb Plantago maritima
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
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4. Genomic and phenotypic consequences of allopolyploidization in Capsella
Abstract : Allopolyploidization, the combination of whole-genome duplication (WGD) and interspecific hybridization, is a frequent and influential event in plant evolution. Allopolyploidization potentially affects both adaptation and diversification, yet the understanding of the consequences of allopolyploidy has been obscured by several issues. READ MORE
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5. Investigating genetic factors behind the decline of a threatened plant species – Tephroseris integrifolia (Asteraceae)
Abstract : Landscape change in Europe has caused the decline of many grassland species. Tephroseris integrifolia (Asteraceae) is one species which has declined rapidly in Sweden since the 19th century. READ MORE