Construct the population-level genetic distance and tree analysis module descriptor
Source:R/module_population_tree_registry.R
population_tree_module_spec.RdThe descriptor owns the complete population-tree registry contract: Nei's (1972) standard genetic distance between populations (`adegenet::dist.genpop()`) and a neighbour-joining tree of populations built from it – distinct from the existing individual-level `tree` module, which builds an NJ tree from IBS distance between samples, not from population allele frequencies.