From
the allele frequencies of 45 markers in ABI Linkage Mapping Sets (panels
13 through 16), we computed FST genetic distances (Wright, 1951).
FST is a simple measure of genetic differentiation and is estimated
as a standardized variance of allele frequencies between two populations.
Next, we represented the genetic distance matrix as a neighbor-joining
tree (Saitou and Nei, 1987). We also estimated a level of confidence for
every branch with a bootstrap approach (Felsenstein, 1985). The figures
shown above the tree branches represent the number of times (expressed
as a percentage) in which that branch was found among 1,000 bootstrapped
trees.
Felsenstein, J (1985) Confidence limits on phylogenies: an approach using the bootstrap. Evolution 39:783-791
Saitou N, and Nei M (1987) The neighbor-joining method: a new method for reconstructing phylogenetic trees. Molecular Biology and Evolution 4:406-425
Wright S (1951) The genetical structure of populations. Annals of Eugenetics 15:323-354