Sökning: "rps16"

Visar resultat 1 - 5 av 11 avhandlingar innehållade ordet rps16.

  1. 1. Phylogenetic Studies in the Gentianales – Approaches at Different Taxonomic Levels

    Författare :Maria Backlund; Mats Thulin; Birgitta Bremer; Kåre Bremer; Mikael Hedrén; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biology; Gentianales; phylogeny; classification; rbcL; trnT-F; rps16; ndhF ndh; Paederieae; Putorieae; Rubiaceae; Loganiaceae; Buddlejaceae; Gelsemiaceae; Apocynaceae; Gentianaceae; Biologi; Biology; Biologi;

    Sammanfattning : This thesis deals with phylogenetic relationships at different taxonomic levels. All the plants studied are or have been included in the order Gentianales, which comprises about 17 200 species. LÄS MER

  3. 2. Disentangling the Reticulate History of Polyploids in Silene (Caryophyllaceae)

    Författare :Magnus Popp; Bengt Oxelman; Magnus Lidén; Jeff J. Doyle; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biology; Silene; Sileneae; polyploidy; low copy nuclear DNA; RNA polymerase; RPA2; RPB2; RPD2; internal transcribed spacer; rps16; psbE-petL; concerted evolution; reticulate evolution; lineage sorting; Biologi; Biology; Biologi;

    Sammanfattning : DNA sequences from the rps16 intron and the psbE-petL spacer from the chloroplast genome, the ribosomal nuclear ITS region, and introns from the low copy nuclear genes RPA2, RPB2, RPD2a and RPD2b, are in different combinations used to infer phylogenetic relationships in Sileneae (Caryophyllaceae). Used in concert, the biparentally inherited nuclear regions are useful to distinguish between paralogy due to allopolyploidy and single gene duplications, respectively, because the latter are not expected to give rise to repeated phylogenetic patterns in potentially unlinked sequence regions. LÄS MER

  4. 3. Systematics in Sileneae (Caryophyllaceae) – Taxonomy and Phylogenetic patterns

    Författare :Frida Eggens; Bengt Oxelman; Magnus Lidén; Susan R. Kephart; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Sileneae; Silene; RNAP; psbE-petG; ITS; rps16; relative dating; Rigidulae; Heliosperma; Arenosae; phylogeny; homoploid reticulate evolution; Silene linearis Decne.; Silene polyphylla L.; Hawaiian Silene; Systematics and phylogenetics; Systematik och fylogeni;

    Sammanfattning : The focus for the first part of the thesis is on the systematics of species belonging to Silene subgenus Silene. Phylogenetic relationships are inferred from DNA sequences from both the plastid (the rps16 intron) and the nuclear (ITS, intron of the RPB2 gene) genomes. LÄS MER

  5. 4. Tracing History : Phylogenetic, Taxonomic, and Biogeographic Research in the Colchicum Family

    Författare :Annika Vinnersten; Kåre Bremer; Bertil Nordenstam; Jerrold I Davis; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biology; biogeography; Colchicaceae; colchicine; dating; phylogeny; taxonomy; Biologi; Biology; Biologi;

    Sammanfattning : This thesis concerns the history and the intrafamilial delimitations of the plant family Colchicaceae. A phylogeny of 73 taxa representing all genera of Colchicaceae, except the monotypic Kuntheria, is presented. LÄS MER

  7. 5. Phylogenies and Secondary Chemistry in Arnica (Asteraceae)

    Författare :Catarina Ekenäs; Katarina Andreasen; Anders Backlund; Lynn Bohs; Uppsala universitet; []
    Nyckelord :Biology; phylogeny; ITS; ETS; RPB2; sesquiterpene lactones; PCA; bioassay; NF-κB; neutrophil; chloroplast; Biologi; Arnica; Asteraceae;

    Sammanfattning : The genus Arnica (Asteraceae) was investigated for phylogenetic relationships and sesquiterpene lactone (STL) content with the aims to trace the evolutionary history of the genus and to investigate possible congruencies between DNA sequence data, secondary chemistry, and biological activity. Complex evolutionary patterns in Arnica are evident from phylogenetic analyses of chloroplast regions (the rpl16 and rps16 introns and the psbA–trnH, ycf4–cemA, and trnT–L spacers), nuclear ribosomal regions (the internal and external transcribed spacers) and the nuclear low-copy DNA region coding for the second largest subunit of RNA polymerase II (RPB2) between exons 17 and 23. LÄS MER