Abstract:
: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.
journal_name
Syst Bioljournal_title
Systematic biologyauthors
Brysting AK,Oxelman B,Huber KT,Moulton V,Brochmann Cdoi
10.1080/10635150701424553subject
Has Abstractpub_date
2007-06-01 00:00:00pages
467-76issue
3eissn
1063-5157issn
1076-836Xpii
779481346journal_volume
56pub_type
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