bonjour , je pensais mettre la racine de mon arbre au niveau du noeud 0.99séparant les bacteria -proteobacteria gamma des bacteria proteobacteriabeta (groupe externe) Pour cela j'ai copié les BPBRRA1-E-value2e-92-Bacteria-Proteobacteria-Betap BPBNCV1-E-value3e-94-Bacteria-Proteobacteria-Betap qui se situent cg-hacune de chaque côté du noeud 0,92 mais cela ne modifie pas l'enracinement Pouvez vous m'aider? +------------+ BPGT1-E-value5e-99-Bacteria-Proteobacteria-Gammapr +--+ 0.93 +---+ 0.92--------+ BPGsC1-E-value2e-97-Bacteria-Proteobacteria-Gammap | | | +-----------------+ BPGNAA1-E-value4e-95-Bacteria-Proteobacteria-Gamma | | +----+ BPGCHC1-E-value3e-113-Bacteria-Proteobacteria-Gamm | +----+ 0.99 | +--+ 0.89---+ BPGCHP1-E-value1e-114-Bacteria-Proteobacteria-Gamm | | | | | +--------+ BPGCSO1-E-value3e-109-Bacteria-Proteobacteria-Gamm | | | | | BPGCMM1-E-value2e-120-Bacteria-Proteobacteria-Gamm | | +------+ 1.00 | ++ 0.18-+ 0.75 +-+ BPGCMM2-E-value3e-120-Bacteria-Proteobacteria-Gamm +-------+ 0.99 || | | | | || +-+ 0.90----+ BPGCCTT1-E-value2e-119-Bacteria-Proteobacteria-Gam | | || | | | | || | +----------+ BPGCCSM1-E-value2e-119-Bacteria-Proteobacteria-Gam | | +--++0.920.90 | | | | | +--+ BPGCCC1-E-value1e-118-Bacteria-Proteobacteria-Gamm | | | | +----+ 0.99 | | | | +-+ BPGCCC2-E-value5e-117-Bacteria-Proteobacteria-Gamm | | +-+ 0.29 | | | | +---------+ BPGCSS1-E-value2e-112-Bacteria-Proteobacteria-Gamm | | | | | | | | +------+ BPGPPEE1-E-value1e-115-Bacteria-Proteobacteria-Gam +--+ 0.92 | | +-----+ 0.99 | | +--------+ 0.99 +----+ BPGPPP1-E-value7e-115-Bacteria-Proteobacteria-Gamm | | | | | | +-------------+ BPGMMA1-E-value2e-116-Bacteria-Proteobacteria-Gamm | | |+--+ 0.52 | | || +------------------------+ OMRGCv2f-10939450-Translation-1-1374-indirect-stra ++ 0.47 ++ 0.44 || | | +-----------------------------+ BPGAAAA1-E-value1e-91-Bacteria-Proteobacteria-Gamm || | +----+ 0.90 || | +-------------------------+ BPGAAH1-E-value3e-91-Bacteria-Proteobacteria-Gamma || | || +---------------------+ BPBRRA1-E-value2e-92-Bacteria-Proteobacteria-Betap =|| |+------------+ BPBNCV1-E-value3e-94-Bacteria-Proteobacteria-Betap | | +-----------+ BPBNGF1-E-value2e-94-Bacteria-Proteobacteria-Betap |+-+ ++ 0.51----------+ BPBNSS1-E-value2e-95-Bacteria-Proteobacteria-Betap | +--------+ BPBNSS2-E-value5e-87-Bacteria-Proteobacteria-Betap |-------|------|-------|-------|------|-------|-------|--- 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 substitutions/site
Width of the tree (number of letters):
Truncate leaf labels to (number of letters):
Collapse branches with support values below (enter 0 not to collapse):
Display as cladogram (ignore branch lengths, in case the tree topology is difficult to see for very short branch lengths): no yes
Re-order leaves : alphanumeric order of labels number of descendants (nodes with fewer descendans appear first) de-ladderize (alternately put nodes with fewer descendants before or after those with more)
Add a spacer in leaf names (in case the leaf names get written over by robustness values) : no yes
Root the tree on the following (give the full name of one or more sequences from the branch you want to root on): (for the tree in the example below, you might enter "BPGVVV1-Bacteria-Proteobacteria-Gammaproteobacteria-Vibrionales BPGAM
Bonjour,
Pour les explications plus détaillées sur l’enracinement, lisez, SVP ce post : http://annotathon.org/?seeThread=3500
Dans votre cas, le groupe qui n’est pas divisé par la racine, c’est les gamma. Vous avez bien identifié le nœud qui et l’ancêtre le plus récent de toutes les séquences de gamma. Il faut donc prendre deux séquences de gamma, dont l’ancêtre le plus récent est à ce nœud.
Dites-moi si ça ne marche pas. Emese Meglecz