title: Phylogeny of Rosa sections Chinenses and Synstylae (Rosaceae) based on chloroplast and nuclear markers.
abstract: Rosa sections Chinenses and Synstylae contain approximately 39 wild species mainly distributed in East Asia and are closely related according to previous studies. But the specific relationships within these two sections were still obscure due to limited sampling, low genetic variation of molecular markers, and complex evolutionary histories. In this study, we used four chloroplast (ndhC-trnV, ndhF-rpl32, ndhJ-trnF and psbJ-petA) and two nuclear (ribosomal ITS and GAPDH) markers with an extensive geographic and taxonomic sampling to explore their evolutionary history. Our phylogenetic analyses suggested that Rosa sections Chinenses and Synstylae defined in traditional taxonomic system are not monophyletic and close to sections Caninae and Gallicanae. Additionally, our results showed incongruence between chloroplast and nuclear markers, and the patterns of incongruence might be due to ancient hybridization (genetic introgression). One putative hybrid species and three samples identified as interspecific hybrids are further discussed in terms of topological incongruence, biological characters and distribution patterns.
authors: Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, Sichuan 610041, China; University of Chinese Academy of Sciences, Beijing 100049, China.
authors: Zhang-Ming
authors: ZM
authors: Zhu
authors: Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, Sichuan 610041, China. Electronic address: xfgao@cib.ac.cn.
authors: Xin-Fen
authors: XF
authors: Gao
authors: Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, Sichuan 610041, China; Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun, Mengla, Yunnan 666303, China.
authors: Marie
authors: M
authors: Fougère-Danezan
mesh_terms: D001499:Bayes Theorem; D005075:Biological Evolution; D002467:Cell Nucleus / Q000235:genetics; D018742:DNA, Chloroplast / Q000235:genetics; D018744:DNA, Plant / Q000235:genetics; D005202:Asia, Eastern; D005819:Genetic Markers; D014644:Genetic Variation; D006824:Hybridization, Genetic; D008957:Models, Genetic; D010802:Phylogeny; D027826:Rosa / Q000145:classification* / Q000235:genetics; D017422:Sequence Analysis, DNA
chemical_list: D018742:DNA, Chloroplast; D018744:DNA, Plant; D005819:Genetic Markers
keywords: Hybridization; Incongruence; Phylogeny; Rosa; Section Chinenses; Section Synstylae