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Chloroplast DNA phylogeography of Betula maximowicziana, a long-lived pioneer tree species and noble hardwood in Japan
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Evolutionary Functional Genomics.
2010 (English)In: Journal of plant research, ISSN 0918-9440, E-ISSN 1618-0860, Vol. 123, no 3, 343-353 p.Article in journal (Refereed) Published
Abstract [en]

Betula maximowicziana is an ecologically and economically important tree species in Japan. In order to examine the phylogeographical pattern of the species in detail, maternally inherited chloroplast (cp) DNA variations of 25 natural populations of Betula maximowicziana and a total of 12 populations of three related species were evaluated by PCR-RFLP analysis. Two main haplotypic groups of B. maximowicziana populations (northern and southern) were detected, with the main boundary passing through the Tohoku region in northeastern Japan; in addition there was high genetic differentiation among the 25 populations studied (G (ST) = 0.950, [Formula: see text]). The phylogeographical pattern exhibited by B. maximowicziana was much more similar to that of alpine plants than to that of beech and oak. Comparison of the patterns of genetic structure obtained from the cpDNA with previously and newly acquired data on bi-parentally inherited nuclear DNA indicates that the nuclear genome was transferred via pollen from the northern haplotypic group to the southern group more frequently than it moved in the opposite direction. Although common haplotypes were detected among B. maximowicziana and the two related species examined, these haplotypes were not shared sympatrically, suggesting very rare hybridization among the species currently occurring in their natural populations.

Place, publisher, year, edition, pages
2010. Vol. 123, no 3, 343-353 p.
Keyword [en]
Betula maximowicziana, Chloroplast DNA, Haplotype sharing, Introgression, Nuclear DNA, Phylogeography
National Category
Biological Sciences
URN: urn:nbn:se:uu:diva-121397DOI: 10.1007/s10265-009-0280-2ISI: 000277025000011PubMedID: 20020172OAI: oai:DiVA.org:uu-121397DiVA: diva2:305226
Available from: 2010-03-23 Created: 2010-03-23 Last updated: 2011-02-25Bibliographically approved

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