I used MrBayes 3.2.6 to build a phylogeny of Nematodes. But I found no matter how I specified the constraint priors of taxa groups, the resulting trees looked same, even the constrained taxa were grouped together the supporting values were not 1, and some constrained taxa were not grouped as monophyly. And the log of execution did not show any problems. Could anyone help me, is my setting wrong or is it a bug in this version? Thanks!
-------my constrain setting like-------
.....
constraint outg hard = OGHETK_Ascaridia_galliX2Y OGCOS_Cruzia_americanaX2Y OGCOS_Oxyascaris_spX2Y; [the 'hard' flag could be missing, no effect]
prset topologypr=constraints(outg);
.....
Thanks a lot, Alexandre!
I find the answer. I guess it is a bug. In the mailing group of MrBayes, many users posted similar questions, but only one answer helps. When the taxa constraining commands are placed after the character partitioning commands, the program will give an expected tree.
All the best,
Liang
- Badges
- Science topic
- Similar topics
- Phytochemistry
- Extracts