TITLE Phylogenetic position of Dipentodon sinicus: evidence from DNA sequences of chloroplast rbcL, nuclear ribosomal 18S, and mitochondria matR genes
AUTHOR Yalin Peng
Key Laboratory of Gene Engineering of The Ministry of Education, Zhongshan University, Guangzhou 510275, The People's Republic of China
Zhiduan Chen
Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100873, The People's Republic of China
Xun Gong
Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, The People's Republic of China
Yang Zhong
Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, School of Life Sciences, Fudan University, Shanghai 200433, The People's Republic of China
Suhua Shi
Key Laboratory of Gene Engineering of The Ministry of Education, Zhongshan University, Guangzhou 510275, The People's Republic of China
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ABSTRACT Phylogenetic position of the monotypic genus Dipentodon has long been controversial. We investigated its position with 125 accessions representing 50 genera and 40 families of eudicots in the APG system. Four data sets¡Xincluding the chloroplast gene rbcL, the nuclear 18S ribosomal DNA, and the mitochondrial gene matR, as well as the combined matrix¡Xwere used in the study with the maximum parsimony (MP) and Bayesian inference (BI) analyses. The phylogenetic trees based on individual genes and the combined data suggested that Dipentodon is sister to Tapiscia (Tapisciaceae) and that Dipentodon could be placed in euroside II of the APG system. The clade of Dipentodon and Tapiscia is closest to Malvales and Sapindales. Such finding does not support the previously suggested close relationship between Dipentodon and various other groups, including Celastraceae, Samydaceae, Flacourtiaceae, Hamamelidaceae, and Santalales.
KEYWORD Bayesian inference; Chloroplast rbcL; Dipentodon sinicus; Maximum parsimony; Mitochondrial matR; Molecular phylogeny; Nuclear ribosomal 18S;
ARTICLE INFO Botanical Bulletin of Academia Sinica, Volume 44 Number 3 July 2003, page 217-222, 6 pages
PUBLISHER Institute of Plant and Microbial Biology, Academia Sinica, Taipei, Taiwan, Republic of China