Fougère-Danezan, Marie , Zhang, Li-Bing , Joly, Simon , Bruneau, Anne , Gao, Xin-Fen .
Phylogenetic relationships in the genus Rosa as inferred from chloroplast and nuclear markers.
Roses are of worldwide economic importance as ornamental shrubs, cut flowers, for perfumes, scents industry and pharmaceutical research. However, despite substantial recent efforts, little is known on the evolution of roses to date. There are about 150 to 200 species of roses widely distributed throughout the temperate and subtropical habitats of the northern hemisphere of which 95 (65 endemic) occur in China. The Chinese roses have been to date constantly undersampled and understudied. Considering that China gathers almost half of the wild species of roses in the world and that several of these species have been hypothesized to have made major contributions to the modern commercial rose it is of great importance to study wild Chinese species. The most frequently used classification (Rehder 1940) divides the genus Rosa into four subgenera (Eurosa, Hesperhodos, Hulthemia, and Platyrhodon) and the subgenus Eurosa into ten sections (Banksianae, Bracteatae, Caninae, Carolinae, Cinnamomae, Gallicanae, Indicae, Laevigatae, Pimpinellifolia, and Synstylae). We use both chloroplast (trnL intron, trnL-F spacer, psbA-trnH spacer) and nuclear markers (GAPDH) to resolve the relationships among wild roses of the world with a particular emphasis on Chinese roses. Our results strengthen previous findings that most of the subdivisions of Rehder are not monophyletic but reveal that some clades are roughly consistent with some of them. Several hybridization events are also revealed by comparison of chloroplast and nuclear phylogenies. The genetic database obtained will be used to solve the origin of some of the cultivars of this genus.
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1 - Chengdu Institute of Biology, Chinese Academy of Sciences, The ECORES Lab, P.O. Box 416, Chengdu, Sichuan, 610041, China
2 - Missouri Botanical Garden, Science and Conservation, P.O. Box 299, St. Louis, MO, 63166, USA
3 - McGill University, Biology Department, 1205 Docteur Penfield, Montréal, Québec, H3A 1B1, Canada
4 - Université de Montréal, Institut de Recherche en Biologie Végétale, Sherbrooke Est 4101, Montréal, Québec, H1X 2B2 , Canada
5 - Chengdu Institute of Biology, Chinese Academy of Sciences, The ECORES Lab, Chengdu, Sichuan, 610041, China
Chinese wild roses
single copy nuclear gene
Presentation Type: Oral Paper:Papers for Sections
Location: Lindell C/Chase Park Plaza
Date: Tuesday, July 12th, 2011
Time: 11:00 AM