Search for dissertations about: "REPRODUCTIVE ISOLATION"
Showing result 1 - 5 of 44 swedish dissertations containing the words REPRODUCTIVE ISOLATION.
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1. Genomic and transcriptomic investigation of reproductive incompatibility in Drosophila
Abstract : Both nuclear and cytoplasmic elements can contribute to the emergence of reproductive incompatibilities that influence evolution and speciation. In the projects that compose this thesis, we use genomics and transcriptomics to study some of those elements in Drosophila. READ MORE
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2. Reproductive isolation at contact zones
Abstract : Speciation is among the most important evolutionary processes that contribute to biodiversity. It involves the formation of new species that have become reproductively isolated through a process that is not linear and varies in time and space. READ MORE
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3. Predation as a driver of reproductive isolation - from adaptive divergence to hybrid inviability
Abstract : Natural selection can play an important role in the origin of new species. When reproductive isolation evolves as a result of ecologically-based divergent natural selection, the process is referred to as ecological speciation. In most organisms, sufficient reproductive isolation is considered to be essential for the establishment of new species. READ MORE
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4. Natural and Sexual Selection in a Natural Hybrid Zone of Ficedula Flycatchers
Abstract : Speciation can be viewed as the formation of reproductive barriers between different populations. This thesis investigates patterns of natural and sexual selection shaping reproductive barriers between two hybridizing flycatchers (i.e. collared – and pied flycatchers). READ MORE
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5. The evolutionary ecology of plant reproductive diversity and floral signals : Mating system and floral scent in Arabis alpina
Abstract : Flowering plants display an extraordinary floral- and reproductive diversity. Variation in the size, shape, colour and scent of flowers, and in systems and strategies of mating, is ubiquitous in comparisons of different species, but also exists among different conspecific populations. READ MORE