Added a method to extract branch-lengths from gene-trees and assign them to a species-tree
Added a method to extract branch-lengths from gene-trees and assign them to a species-tree

Ensembl/ensembl-compara,Ensembl/ensembl-compara,Ensembl/ensembl-compara,Ensembl/ensembl-compara,Ensembl/ensembl-compara,Ensembl/ensembl-compara,Ensembl/ensembl-compara,Ensembl/ensembl-compara