alm,
Belated congratulations. Just got around to reading this interesting thread. I also complement you on your choice of phenotype breeding. Actually, that is exactly what nature does with natural selection. Those with the right phenotype that allows them to survive, breed and pass on these traits. Those that don\'t, do not, regardless of their breeding. Nature is not impressed by pedigrees. The incredible ability of species to adapt to their environment is a testament to phenotype breeding.
No doubt, knowledge of pedigree can add some information to the genetic puzzle, but since what is most important in breeding is a particular horse\'s genotype, a horses phenotype is crucial since it reveals at least half of that genotype.
What is true for breeding goes double for handicapping. A particular horse\'s past performance is the best predictor of it\'s future performance, though Albany is correct that pedigree is of some use when a horse is attempting something totally new. However, is a much, much riskier method of prediction.
Bob