Sökning: "sequence variation"

Visar resultat 16 - 20 av 290 avhandlingar innehållade orden sequence variation.

  1. 16. Genetics and the Origin of Two Flycatcher Species

    Författare :Thomas Borge; Glenn-Peter Saetre; Staffan Bensch; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biology; reinforcement; reproductive isolation; Z chromosome; hybridization; mate-choice; single nucleotide polymorphism; sequence variation; sexual selection; recombination; Biologi; Biology; Biologi;

    Sammanfattning : In this thesis, different genetic tools are used to investigate pre- and postzygotic barriers to gene exchange and their role in speciation in the pied flycatcher (Ficedula hypoleuca) and the collared flycatcher (F. albicollis). This species complex consists of four genetically distinct clades that apparently diverged in allopatry (I). LÄS MER

  3. 17. Natural variation in cold adaptation and freezing tolerance in Arabidopsis thaliana

    Författare :Antoine Bos; Pär Ingvarsson; Hans Stenøien; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Arabidopsis thaliana; cold acclimation; freezing tolerance; flowering time; latitudinal clines; genetic variation; evolutionary genetics; Molecular biology; Molekylärbiologi;

    Sammanfattning : Plants have spread to almost everywhere in the world. As they disperse, they meet many different environments to which they may be able to adapt. For a plant species to adapt to a new environment, genetic variation is needed. The individuals differ from each other in their genetic composition, which often means differences in phenotypes. LÄS MER

  4. 18. Analysis of domestic dog mitochondrial DNA sequence variation for forensic investigations

    Författare :Helen Angleby; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Biotechnology; forensics; mtDNA; control region; hair; domestic dog; breed; Bioteknik; Bioengineering; Bioteknik;

    Sammanfattning : The first method for DNA analysis in forensics was presented in 1985. Since then, the introduction of the polymerase chain reaction (PCR) has rendered possible the analysis of small amounts of DNA and automated sequencing and fragment analysis techniques have facilitated the analyses. LÄS MER

  5. 19. Patterns of geographic variation in Silene section Elisanthe (Caryophyllaceae): hybridization and migrational history

    Författare :Louise Hathaway; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; chemotaxonomy. Physiology of nonvascular plants; phytogeography; morphology; outbreeding depression; Systematic botany; taxonomy; ITS; fitnes; inbreeding depression; AFLP; PCR-RFLP; cpDNA; gene flow; postglacial migration; geographic variation; hybridization; Silene latifolia; Silene section Elisanthe; Silene dioica; Systematisk botanik; taxonomi; morfologi; kemotaxonomi. Växters fysiologi inte kärlväxter .;

    Sammanfattning : Large-scale patterns of genetic variation in chloroplast (cp) and nuclear DNA in the widespread European herb species Silene latifolia and S. dioica were investigated using cpPCR-RFLPs, non-coding cpDNA sequences, AFLPs and sequences of the internal transcribed spacers (ITS) of nuclear ribosomal DNA (rDNA). LÄS MER

  7. 20. Methods and applications in DNA sequence alignments

    Författare :Ellen Sherwood; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :DNA sequence alignment; CNV; Chicken; Trypanosoma cruzi.;

    Sammanfattning : DNA sequence alignment is one of the most common bioinformatics tasks. Alignment analysis for eukaryotic genomes is challenging because the datasets are large. Repeat sequences also make the analysis difficult. This thesis describes new methods which we have developed for DNA sequence alignment that address these problems. LÄS MER