The aim of this note is to overview the characteristics of the Phylogenetic Diversity (PD) method in
order to quantify genetic diversity in animal genetic resources conservation programs. The PD method
performance has been compared with that of the Weitzman approach on a dataset consisting in 398
individuals belonging to 11 Spanish sheep breeds that were genotyped for a set of 14 microsatellites.
Results from the PD and the Weitzman methods are similar. However, the PD method is less computing
intensive thus allowing for its use at individual level. Moreover the PD does not need the assumption
of ultrametricity of the distances. The use of the PD method in livestock conservation programs
can be advanteageous with respect the Weitzman approach.
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