Rev Language Reference
maximumTree - Maximum tree function to build a species tree.
Builds the maximum species tree given several ultrametric gene trees.
Usage
maximumTree(TimeTree[] geneTrees)
Arguments
| geneTrees : | TimeTree[] (pass by const reference) |
| The vector of trees from which to pick the maximum. |
Return Type
Details
The maximum species tree is a consistent estimate of the species tree under the multispecies coalescent model, if the gene trees are correct and the effective population size constant along the species tree.
Example
# We simulate a species tree and gene trees and reconstruct a species tree using maximum tree:
# Let’s simulate a species tree with 10 taxa, 5 gene trees, 1 alleles per species:
n_species <- 10
n_genes <- 5
n_alleles <- 2
# we simulate an ultrametric species tree:
# Species names:
for (i in 1:n_species) {
species[i] <- taxon(taxonName="Species_"+i, speciesName="Species_"+i)
}
spTree ~ dnBirthDeath(lambda=0.3, mu=0.2, rootAge=10, rho=1, samplingStrategy="uniform", condition="nTaxa", taxa=species)
print(spTree)
# let's pick a constant effective population size of 50:
popSize <- 50
# let's simulate gene trees now:
# taxa names:
for (g in 1:n_genes) {
for (i in 1:n_species) {
for (j in 1:n_alleles) {
taxons[g][(i-1)*n_alleles+j] <- taxon(taxonName="Species_"+i, speciesName="Species_"+i)
}
}
geneTrees[g] ~ dnMultiSpeciesCoalescent(speciesTree=spTree, Ne=popSize, taxa=taxons[g])
}
# Let's compute the maximum tree:
recTree <- maximumTree(geneTrees)
print(recTree)
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