FigTree collapses whole tree when I want to collapse only outgroup?

Sebastiaan Koppelle @Sebastiaan-Koppelle

27 May 2021 1 4K Report

Hi all,

I am building a phylogenetic tree based on 18S rDNA data. The tree consists of 32 sequences and for correct representation I included 5 strains as outgroup. Now I want to collapse my outgroup when the tree is imported in FigTree, but in a weird way it not only collapses my outgroup, but my complete tree (basically get my ourgroup collapsed as well as the rest of my tree).

Does anybody perhaps know what is going on here and how I can prevent this from happening?

Thanks!

Elvince Ager

Hello, @Sebastiaan Koppelle, I don't know if I am late to answer this but, the reason the entire tree collapses is because your entire tree is basically a clade that is rooted to the outgroup. So, by selecting your outgroup you are selecting the all the clades upward of your outgroup and therefore you collapse the ingroup instead of the outgroup.

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