Sökning: "hybridization"

Visar resultat 11 - 15 av 578 avhandlingar innehållade ordet hybridization.

1. 11. Evolution of Flowering Time in the Tetraploid Capsella bursa-pastoris (Brassicaceae)

   Författare :Tanja Slotte; Martin Lascoux; Ulf Lagercrantz; Juliette de Meaux; Uppsala universitet; []
   Nyckelord :Biology; flowering time; homoeolog; hybridization; introgression; microarray; multiple origins; polyploid; QTL; Biologi;

   Sammanfattning : Although polyploidy is believed to be a major source of evolutionary novelty, few studies have examined the genetic basis of phenotypic variation in wild polyploids. In this thesis I have studied the genetic basis of flowering time variation in the wild tetraploid crucifer Capsella bursa-pastoris, as well as the evolutionary history of this species. LÄS MER

3. 12. Stochastic Models in Phylogenetic Comparative Methods: Analytical Properties and Parameter Estimation

   Författare :Krzysztof Bartoszek; Göteborgs universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Adaptation; Adaptation; Birth-death process; Branching diffusion; Brownian motions; Conditioned branching process; Evolution; General Linear Model; Hybridization; Macroevolution; Measurement error; Multivariate phylogenetic comparative method; Optimality; Ornstein-Uhlenbeck process; Phyletic gradualism; Phylogenetic inertia; Phylogenetic uncertainty; Punctuated equilibrium; Yule tree; Macroevolution;

   Sammanfattning : Phylogenetic comparative methods are well established tools for using inter-species variation to analyse phenotypic evolution and adaptation. They are generally hampered, however, by predominantly univariate approaches and failure to include uncertainty and measurement error in the phylogeny as well as the measured traits. LÄS MER

4. 13. Från Kingston till Göinge : autencitet, identitet och representationer av det förflutna i svensk reggaekultur

   Författare :Emilia Frölich; Mats Greiff; Bodil Liljefors Persson; Despina Tzimoula; Lars Kaijser; Malmö universitet; []
   Nyckelord :HUMANIORA; HUMANITIES; Reggae; history; identity; authenticity; representation; cultural analysis; hybridization; Swedishness;

   Sammanfattning : This thesis explores the role of history in popular culture with a particular focus on the Swedish reggae scene. It examines how cultural meaning applied to music bears strong connections to historical representations, and how individuals understand, communicate, and reproduce selective notions of the past in relationship to popular music. LÄS MER

5. 14. Competition, Coexistence and Character Displacement : In a Young Avian Hybrid Zone

   Författare :Niclas Vallin; Anna Qvarnström; Andrew Hendry; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Competition; coexistence; hybridization; ecological speciation; character displacement; pied flycatcher; collared flycatcher; Biology; Biologi; Animal Ecology; Zooekologi;

   Sammanfattning : This thesis investigates the ecological and evolutionary implications of a recent secondary contact between two closely related bird species: collared (Ficedula albicollis) and pied (F. hypoleuca) flycatchers. LÄS MER

7. 15. Microfluidic bead-based methods for DNA analysis

   Författare :Aman Russom; Ulf Gyllensten; KTH; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Genetics; single nucleotide polymorphism; DNA analysis; SNP; microfluidics; pyrosequencing; beads; lab on a chip; hybridization; DASH; microsystem; micro totat analysis system; allele-specific extension; DASH; microcontact printing; Genetik; Clinical genetics; Klinisk genetik;

   Sammanfattning : With the completion of the human genome sequencing project, attention is currently shifting toward understanding how genetic variation, such as single nucleotide polymorphism (SNP), leads to disease. To identify, understand, and control biological mechanisms of living organisms, the enormous amounts of accumulated sequence information must be coupled to faster, cheaper, and more powerful technologies for DNA, RNA, and protein analysis. LÄS MER