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A Unique Recent Origin of the Allotetraploid Species Arabidopsis suecica: Evidence from Nuclear DNA Markers
Department of Human Genetics University of Michigan.
Linköping University, Department of Physics, Chemistry and Biology. Linköping University, The Institute of Technology.
Molecular and Computational Biology University of Southern California.
Department of Cell and Organism Biology, Genetics Lund University, Sweden.
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2006 (English)In: Molecular biology and evolution, ISSN 0737-4038, E-ISSN 1537-1719, Vol. 23, no 6, 1217-1231 p.Article in journal (Refereed) Published
Abstract [en]

A coalescent-based method was used to investigate the origins of the allotetraploid Arabidopsis suecica, using 52 nuclear microsatellite loci typed in eight individuals of A. suecica and 14 individuals of its maternal parent Arabidopsis thaliana, and four short fragments of genomic DNA sequenced in a sample of four individuals of A. suecica and in both its parental species A. thaliana and Arabidopsis arenosa. All loci were variable in A. thaliana but only 24 of the 52 microsatellite loci and none of the four sequence fragments were variable in A. suecica. We explore a number of possible evolutionary scenarios for A. suecica and conclude that it is likely that A. suecica has a recent, unique origin between 12,000 and 300,000 years ago. The time estimates depend strongly on what is assumed about population growth and rates of mutation. When combined with what is known about the history of glaciations, our results suggest that A. suecica originated south of its present distribution in Sweden and Finland and then migrated north, perhaps in the wake of the retreating ice.

Place, publisher, year, edition, pages
2006. Vol. 23, no 6, 1217-1231 p.
Keyword [en]
Arabidopsis suecica • Arabidopsis thaliana • polyploidy • polymorphism • speciation • founders
National Category
Natural Sciences
URN: urn:nbn:se:liu:diva-35943DOI: 10.1093/molbev/msk006Local ID: 29109OAI: diva2:256791
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2010-04-20

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Hagenblad, Jenny
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Department of Physics, Chemistry and BiologyThe Institute of Technology
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