• Search

About Us       Research       human resources       International Cooperation       News       Education & Training       Join Us       Journals       Publications       Resources       Contact
Location:Home > Research > Achievements
Mitochondrial matR sequences help resolve deep phylogenetic relationships in rosids
Print  |  Close    Text size:A  A  A

The mitochondrial matR single gene and combined four-gene DNA sequences, including matR , rbcL , atpB , and 8S rDNA, were used to examine high-level phylogenetic relationships of rosids. The mitochondrial matR data supported the hypothesis that the deepest split within eurosids might be between the nitrogen-fixing clade and a large clade, including the COM subclade of eurosids I, and eurosids II, which was not resolved by any previous molecular analyses but was recently suggested by floral structural features. Analyses of the four-gene dataset suggested that Geraniales and Myrtales were successively sister to other rosids, Crossosomatales are a sister group to eurosids II, and the core part of rosids should include eurosids I, eurosids II , and Crossosomatales. Evolutionary analyses revealed that slow evolution and relaxed selection make mitochondrial matR suitable for high-level angiosperm phylogenetics ( BMC Evol. Biol. 2007 ) .

Figure A revised branching pattern of rosids (modified from APG II 2003 ) based on mitochondrial matR DNA sequences and combined four-gene DNA sequences from matR , rbcL , atpB , and 18S rDNA. The nodes in red indicate the new supported resolutions from this study 。 (Zhu et al., 2007. BMC Evolutionary Biology )

Institute of Botany, CAS    Add: No.20 Nanxincun, Xiangshan, Beijing 100093, China
京ICP备16067583号-24 Tel: +86 10 6283 6215    Fax: +86 10 6259 0833    E-mail: Int_Office@ibcas.ac.cn