Sökning: "sexual recombination"

Visar resultat 1 - 5 av 24 avhandlingar innehållade orden sexual recombination.

1. 1. Genomic studies of sex differences : On mutations, recombination, and sexual antagonism in songbirds

   Författare :Hongkai Zhang; MEMEG; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; sex differences; mutation; recombination; sexual conflict; sexual antagonism; sexually antagonistic selection; Great reed warbler; Acrocephalus arundinaceus;

   Sammanfattning : Many organisms have separate sexes, i.e., males and females. The presence of separate sexes causes sex-specific selection regimes and sexual antagonism, which can lead to sex differences in morphology, physiology, and behaviours. LÄS MER

3. 2. 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

4. 3. A forest dark : an evolutionary history of Norway spruce

   Författare :Alexis R. Sullivan; Xiao-Ru Wang; Nathaniel Street; María Rosario García-Gil; Bengt Oxelman; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; phylogenetics; genome assembly; recombination; Picea; hybridization; mitogenome; Norway spruce; phylogeography; phylogenetic networks; plastome;

   Sammanfattning : Embedded within the relationships among species is a dense forest of gene trees, each with a potentially unique and discordant history. Such widespread genealogical heterogeneity is expected, but embracing this hierarchy of discordance while reconstructing the histories of populations and species remains a major challenge. LÄS MER

5. 4. Quantitative Genetics and Genome Structure in a Wild Population: the Use of a Great Reed Warbler Pedigree

   Författare :Mikael Åkesson; Biologiska institutionen; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; genome mapping ; AFLP; microsatellite; synteny; heterochiasmy; recombination; chicken; great reed warbler ; bird; Genetics; cytogenetics; Genetik; cytogenetik; Animal ecology; trait correlation ; Djurekologi; animal model ; selection; Djurs anatomi och morfologi; animal morphology; Animal anatomy; heritability;

   Sammanfattning : Long-term studies of birds play an important role in the understanding of quantitative traits in natural populations. The relative ease by which individual birds can be monitored and caught in the wild enable us collect detailed information from individuals throughout their life time, sometimes from several generations in a population. LÄS MER

7. 5. Comparative Genomics in Diplomonads : Lifestyle Variations Revealed at Genetic Level

   Författare :Feifei Xu; Jan O. Andersson; Staffan G. Svärd; Matt Berriman; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; comparative genomics; Giardia intestinalis; Spironucleus salmonicida; Trepomonas; diplomonad; intestinal parasite; free-living; sexual recombination; hydrogenosome; horizontal gene transfer; Biologi med inriktning mot molekylär evolution; Biology with specialization in Molecular Evolution;

   Sammanfattning : As sequencing technologies advance genome studies are becoming a basic tool for studying an organism, and with more genomes available comparative genomics is maturing into a powerful tool for biological research. This thesis demonstrates the strength of a comparative genomics approach on a group of understudied eukaryotes, the diplomonads. LÄS MER