Chloroplast DNA phylogeography of Betula maximowicziana, a long-lived pioneer tree species and noble hardwood in Japan

Journal of Plant Research - Tập 123 - Trang 343-353 - 2009
Yoshiaki Tsuda1,2,3, Yuji Ide1
1Laboratory of Forest Ecosystem Studies, Department of Ecosystem Studies, Graduate School of Agriculture and Life sciences, The University of Tokyo, Tokyo, Japan
2Tree Genetics Laboratory, Department of Forest Genetics, Forestry and Forest Products Research Institute (FFPRI), Tsukuba, Japan
3Department of Evolutionary Functional Genomics, Evolutionary Biology Centre, Uppsala University, Uppsala, Sweden

Tóm tắt

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 (GST = 0.950, $$ G_{\text{ST}}^{\prime } = 0. 9 7 7 $$ ). 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.

Tài liệu tham khảo

De Jong PC (1993) An introduction to Betula: its morphology, evolution, classification and distribution, with a survey of recent work. In: Hunt D (ed) Proceedings of the IDS Betula symposium, 2–4 October 1992. International Dendrology Society, Richmond, UK

Excoffier L, Laval G, Schneider S (2007) ARLEQUIN version 3.1: an integrated software package for population genetics data analysis. http://cmpg.unibe.ch/ software/arlequin3

Goudet J (2001) FSTAT; a program to estimate and test gene diversities and fixation indices version 2.9.3. http://www.unil.ch/izea/softwares/fstat.html

Hagiwara S (1977) Clines on leaf size of beech Fagus crenata (in Japanese). Species Biol Res 1:39–51

Hedrick PW (2005) A standardized genetic differentiation measure. Evolution 59:1633–1638

Heuertz M, Hausman J-F, Hardy OJ, Vendramin GG, Frascaria-Lacoste N, Vekemans X (2004a) Nuclear microsatellites reveal contrasting patterns of genetic structure between western and southeastern European populations of the common ash (Fraxinus excelsior L.). Evolution 58:976–988

Järvinen P, Palmé A, Morales O, Lännenpää M, Keinänen M, Sopanen T, Lascoux M (2004) Phylogenetic relationships of Betula species (Betulaceae) based on nuclear ADH and chloroplast matK sequences. Am J Bot 91:1834–1845

Ohwi J (1965) Flora of Japan (in Japanese). Shinbundo, Tokyo

Palmé AE, Semerikov V, Lascoux M (2003b) Absence of geographic structure of chloroplast DNA variation in sallow, Salix caprea L. Heredity 91:465–474

Watanabe S (1989) Silvical characteristics of Betula maximowicziana (in Japanese). For Tree Breed Hokkaido 32:15–18