Phylogenetic Analysis of the Wintergreen Group (Ericaceae) based on Six Genic Regions
Fritsch, Peter W.1; Lu, Lu2; Bush, Catherine M.3; Cruz, Boni C.1; Kron, Kathleen A.3; Li, De-Zhu2
2011-10-01
发表期刊SYSTEMATIC BOTANY
ISSN0363-6445
卷号36期号:4页码:990-1003
摘要Previous phylogenetic studies based on DNA sequence data from the genic regions ndhF, matK, atpB-rbeL (cpDNA) and ITS 2 (nrDNA) strongly support the monophyly of the wintergreen group (Ericaceae: Gaultherieae: Diplycosia, Gaultheria, Tepuia) and have assessed the relationships of its major clades. Other studies that include additional genic regions have been limited to two clades corresponding to various sections or series within Gaultheria. Here we expand both the number of species (from 42 to 104) and genic regions (chloroplast mat K, ndhF, rpl16, trnL-trnF, trnS-trnG, and the complete ITS region) to further assess phylogenetic relationships in the wintergreen group. With the additional data we detected several areas of incongruence between the trees from the nuclear and combined chloroplast analyses, including a topologically deep conflict involving G. procumbens. Such incongruence likely originated from reticulation events, long considered to have influenced the evolution of various lineages in Gaultheria. We also detected a duplication, possibly nuclear-encoded, of the matK region in one of the Australian/New Zealand lineages. A combined six-gene analysis, in which taxa involved in the conflicting topologies were excluded, yielded higher support values for several early-diverging clades. The monophyly of both Diplycosia and Tepuia is corroborated, as is the successive nesting of Tepuia, G. section Hispidulae (both placements of which have newfound strong support), G. ser. Gymnobotrys, and Diplycosia. Whereas several sections or series with more than one species in the most recent classification of Gaultheria are supported as circumscribed (i.e. G. section Amblyandra and series Hispidulae, Myrtilloideae, and Trichophyllae), others comprise species from two to several different clades.
关键词Diplycosia Gaultheria Gaultherieae Hybridization Reticulate Evolution Tepuia
资助信息National Science Foundation[DEB-0717744, DEB-0717711]; National Basic Research Program of China (973 Program)[2007CB411601]; Lakeside Foundation
收录类别SCI
语种英语
引用统计
文献类型期刊论文
条目标识符http://ir.kib.ac.cn/handle/151853/3970
专题中国科学院东亚植物多样性与生物地理学重点实验室
作者单位1.Calif Acad Sci, Dept Bot, San Francisco, CA 94118 USA
2.Chinese Acad Sci, Key Lab Biodivers & Biogeog, Kunming Inst Bot, Kunming 650204, Yunnan, Peoples R China
3.Wake Forest Univ, Dept Biol, Winston Salem, NC 27109 USA
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Fritsch, Peter W.,Lu, Lu,Bush, Catherine M.,et al. Phylogenetic Analysis of the Wintergreen Group (Ericaceae) based on Six Genic Regions[J]. SYSTEMATIC BOTANY,2011,36(4):990-1003.
APA Fritsch, Peter W.,Lu, Lu,Bush, Catherine M.,Cruz, Boni C.,Kron, Kathleen A.,&Li, De-Zhu.(2011).Phylogenetic Analysis of the Wintergreen Group (Ericaceae) based on Six Genic Regions.SYSTEMATIC BOTANY,36(4),990-1003.
MLA Fritsch, Peter W.,et al."Phylogenetic Analysis of the Wintergreen Group (Ericaceae) based on Six Genic Regions".SYSTEMATIC BOTANY 36.4(2011):990-1003.
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