Search for dissertations about: "allopolyploidy"

Showing result 1 - 5 of 8 swedish dissertations containing the word allopolyploidy.

  2. 1. Systematics and polyploid evolution in Potentilleae (Rosaceae)

    Author : Magnus Lundberg; Torsten Eriksson; Jürg Schönenberger; Bengt Oxelman; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Potentilleae; Fragariinae; Potentilla; Sibbaldia; Fragaria; Alchemilla; systematics; phylogeny; polyploidy; autopolyploidy; allopolyploidy; reticulate evolution; Systematics and phylogenetics; Systematik och fylogeni; växtsystematik; Plant Systematics;

    Abstract : This thesis comprises studies of the phylogenetic relationships in the flowering plant clade Potentilleae in Rosaceae. The relationships were elucidated by using DNA sequence data from the nuclear genome as well as from the plastid genome. In particular, the focus of the studies was the investigation of allopolyploidy, i.e. READ MORE

  4. 2. The evolutionary history of Geum (Rosaceae, Colurieae) : a study of ancient allopolyploid speciation

    Author : Jenny E. E. Smedmark; Birgitta Bremer; Pamela S. Soltis; Stockholms universitet; []
    Keywords : Geum; Rosaceae; molecular phylogeny; allopolyploidy; morphological evolution; gynoecial development; NATURAL SCIENCES; NATURVETENSKAP;

    Abstract : Allopolyploid speciation plays an important role in flowering plant evolution. Its contribution to diversity has been suggested to be significant in Geum. READ MORE

  5. 3. Genomic and phenotypic consequences of allopolyploidization in Capsella

    Author : Tianlin Duan; Martin Lascoux; Adrien Sicard; Sylvain Glémin; Barbara Mable; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Allopolyploidy; Polyploidy; Hybridization; Neopolyploid lines; Gene expression; Self-incompatibility; Capsella bursa-pastoris;

    Abstract : Allopolyploidization, the combination of whole-genome duplication (WGD) and interspecific hybridization, is a frequent and influential event in plant evolution. Allopolyploidization potentially affects both adaptation and diversification, yet the understanding of the consequences of allopolyploidy has been obscured by several issues. READ MORE

  6. 4. Genome evolution and adaptation of a successful allopolyploid, Capsella bursa-pastoris

    Author : Dmytro Kryvokhyzha; Martin Lascoux; Vincent Castric; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; allopolyploidy; population structure; selection; genetic drift; gene expression; parental legacy; genetic load; Biologi med inriktning mot evolutionär funktionsgenomik; Biology with specialization in Evolutionary Functional Genomics;

    Abstract : The term allopolyploid refers to an organism that originated through hybridization and increased its ploidy level by retaining the unreduced genomes of its parents. Both hybridization and polyploidy usually have negative consequences for the organism. READ MORE

  7. 5. Systematics of polyploid Dactylorhiza (Orchidaceae) - genetic diversity, phylogeography and evolution

    Author : Sofie Olofsson; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; microsatellites; allozymes; ITS; plastid DNA; Dactylorhiza majalis ssp. traunsteineri; allopolyploidy; AFLPs; immigration history; diploidization; hybridization;

    Abstract : This thesis examines genetic variation in allotetraploids of the Dactylorhiza incarnata/maculata polyploid complex in different parts of Europe. The molecular markers used were AFLPs, allozymes, ITS, nuclear microsatellites and plastid DNA markers. READ MORE