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Twentieth-century changes in the genetic composition of Swedish field pea metapopulations
Linköping University, Department of Physics, Chemistry and Biology, Molecular genetics. Linköping University, The Institute of Technology.
Department of Biology, Norwegian University of Science and Technology, Trondheim, Norway.
Linköping University, Department of Physics, Chemistry and Biology, Biology. Linköping University, The Institute of Technology.
2013 (English)In: Heredity, ISSN 0018-067X, E-ISSN 1365-2540, Vol. 110, no 4, 338-346 p.Article in journal (Refereed) Published
Abstract [en]

Landrace crops are formed by local adaptation, genetic drift and gene flow through seed exchange. In reverse, the study of genetic structure between landrace populations can reveal the effects of these forces over time. We present here the analysis of genetic diversity in 40 Swedish field pea (Pisum sativum L.) populations, either available as historical seed samples from the late 19th century or as extant gene bank accessions assembled in the late 20th century. The historical material shows constant high levels of within-population diversity, whereas the extant accessions show varying, and overall lower, levels of within-population diversity. Structure and principal component analysis (PCA) cluster most accessions, both extant and historical, in groups after geographical origin. County-wise analyses of the accessions show that the genetic diversity of the historical accessions is largely overlapping. In contrast, most extant accessions show signs of genetic drift. They harbour a subset of the alleles found in the historical accessions and are more differentiated from each other. These results reflect how historically, present metapopulations have been preserved during the 20th century, although as genetically isolated populations.

Place, publisher, year, edition, pages
Macmillan Publishers Ltd., 2013. Vol. 110, no 4, 338-346 p.
Keyword [en]
Pisum sativum, SSRs, population structure, landraces, aged DNA, seed exchange
National Category
Natural Sciences
URN: urn:nbn:se:liu:diva-86976DOI: 10.1038/hdy.2012.93ISI: 000316552300005PubMedID: 23169556OAI: diva2:583975
Available from: 2013-01-08 Created: 2013-01-08 Last updated: 2013-04-29Bibliographically approved

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Leino, Matti W.Hagenblad, Jenny
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