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The genetic structure of Quercus crispula in northeastern Japan as revealed by nuclear simple sequence repeat loci
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Plant Ecology and Evolution.
2011 (English)In: Journal of plant research, ISSN 0918-9440, E-ISSN 1618-0860, Vol. 124, no 6, 645-654 p.Article in journal (Refereed) Published
Abstract [en]

Previous studies have reached different discussions about the genetic variation and genetic structure of Quercus crispula populations in northeastern Japan. This is a common oak species in Eastern Asia. Some studies have suggested that the populations in northeastern Japan were derived from those remaining in the southwest after the last glacial maximum (LGM), whilst other studies have found evidence that populations persisted in northeastern Japan during the LGM. Using seven highly polymorphic nuclear simple sequence repeat loci, we investigated the genetic structure of 16 Q. crispula populations along a latitudinal gradient in northeastern Japan (northern Honshu and Hokkaido), spanning about half of the species' biogeographic range in the country. Although the level of population differentiation was low (F (ST) = 0.021; G '(ST) = 0.090), two geographically differentiated clusters were detected by STRUCTURE analysis. The first cluster included most of the populations in Hokkaido, and may indicate continued survival throughout past glacial periods. We found a significant decrease in allelic richness with latitude, so the second cluster may represent an expansion of the lineage from Honshu during the post-glacial period. These results should enhance our understanding of historical north-south migrations of this species in northeastern Japan.

Place, publisher, year, edition, pages
2011. Vol. 124, no 6, 645-654 p.
Keyword [en]
Genetic structure, Geographic pattern, Nuclear SSRs, Quercus crispula, STRUCTURE analysis
National Category
Ecology
Identifiers
URN: urn:nbn:se:uu:diva-161926DOI: 10.1007/s10265-010-0402-xISI: 000296480300001OAI: oai:DiVA.org:uu-161926DiVA: diva2:458543
Available from: 2011-11-23 Created: 2011-11-21 Last updated: 2017-12-08Bibliographically approved

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Tsuda, Yoshiaki

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