| Abstract Detail
Systematics Section / ASPT Li, Jianhua [1], Yue, Jipei [2], Shoup, Suzanne [1]. Phylogenetics of Acer (Aceroideae, Sapindaceae) based on nucleotide sequences of two chloroplast non-coding regions. ACER is one of the most diverse woody genera in the Northern Hemisphere. Recent phylogenetic studies support the placement of Acer and Dipteronia – sole members of the traditional Aceraceae – in the Sapindaceae. However, the monophyly of Acer and its sections remain to be tested. In this study, sequences of two chloroplast non-coding regions, psbM-trnD, and trnD-trnT, are used to elucidate phylogenetic relationships of Acer and Dipteronia. Our results support the monophyly of Acer and sections Arguta, Ginnala, Integrifolia, Lithocarpa, Macrantha, Palmata, Platanoidea, and Trifoliata. In contrast, sections Acer, Goniocarpa, Parviflora, Saccharodendron, and Spicata are not monophyletic. A. trautvetteri and A. opalus of section Acer are more closely related to Acer monspessulanum of section Goniocarpa and A. saccharum of section Saccharina than to A. caesium and A. pseudoplatanus of section Acer. A. distylium of section Parviflora is more closely related to section Platanoidea than to A. nipponicum of section Parviflora. Morphological species pairs between eastern Asia and North America are not sister species, including A. pycnanthum - A. rubrum and A. caudatum - A. spicatum. A. ukurunduense is a distinct species from A. caudatum. A. glabrum is most closely related to A. pseudoplatanus, while A. spicatum may be more closely related to A. carpinifolium than to A. caudatum. Section Hyptiocarpa is most closely related to section Rubra and the two North American species of section Rubra (A. rubrum and A. saccharinum) are more closely related to each other than they are to Japanese species (A. pycnanthum). Sections Integrifolia and Trifoliata are closely related, and so are Cissifolia and Arguta. Nevertheless, more data are needed to fully resolve intersectional relationships of Acer.
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1 - Harvard University, Arnold Arboretum, Harvard University Herbaria, 22 Divinity Avenue, Cambridge, Massachusetts, 02138, USA
2 - Chinese Academy of Sciences, Kunming Institute of Botany, Heilongtan, Kunming, Yunnan, 650204, China
Keywords:
Acer
Sapindaceae
chloroplast
non-coding.
Presentation Type: Oral Paper:Papers for Sections
Session: 51-2
Location: 120/Ayres
Date: Tuesday, August 1st, 2006
Time: 2:15 PM
Abstract ID:202 |
