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Untangling complex histories of genome mergings in high polyploids
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Evolution, Genomics and Systematics, Systematic Botany.
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2007 (English)In: Systematic Biology, ISSN 1063-5157, E-ISSN 1076-836X, Vol. 56, no 3, 467-476 p.Article in journal (Refereed) Published
Abstract [en]

Polyploidy, the duplication of entire genomes, plays a major role in plant evolution. In allopolyploids, genome duplication is associated with hybridization between two or more divergent genomes. Successive hybridization and polyploidization events can build up species complexes of allopolyploids with complicated network-like histories, and the evolutionary history of many plant groups cannot be adequately represented by phylogenetic trees because of such reticulate events. The history of complex genome mergings within a high-polyploid species complex in the genus Cerastium (Caryophyllaceae) is here untangled by the use of a network algorithm and noncoding sequences of a low-copy number gene. The resulting network illustrates how hybridization and polyploidization have acted as key evolutionary processes in creating a plant group where high-level allopolyploids clearly outnumber extant parental genomes.

Place, publisher, year, edition, pages
2007. Vol. 56, no 3, 467-476 p.
Keyword [en]
Allopolyploidy, low-copy number gene, network construction, reticulate evolution
National Category
Biological Sciences
URN: urn:nbn:se:uu:diva-14579DOI: 10.1080/10635150701424553ISI: 000248168200001PubMedID: 17562470OAI: oai:DiVA.org:uu-14579DiVA: diva2:42350
Available from: 2008-02-04 Created: 2008-02-04 Last updated: 2011-01-26Bibliographically approved

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