Folks sent me a couple Facebook messages about my last post related to understanding pedigree distance breeding in Triple Crown races, I constructed this comparison that I thought you'd find interesting.
Dosage is a calculated factor which considers the distance sires contained within a horse's pedigree were able to win. There's is a ton of information about dosage online if you are interested but, the lower the number the better a horse can typically run long.
Distance breeding has an effect on the Derby to a measurable degree considering 3 year olds running the 1 1/4 mile distance, but it has a huge effect on the Belmont at the 1 1/2 mile distance.
While I believe a study of Fractional Times and Average Winning Distance of sires is more effective in predicting distance capability, there is a proven correlation between dosage and distance. Of course, as with all things, there will be anomalies, just like you will occasionally throw snake eyes on two dice. (A known 1 in 36 event.) Though an anomaly may emerge, only knucklehead gamblers bet that it will.
Hope this helps and if you have more questions let me know.
Dave Astar is a race horse owner, stallion owner, breeder, 40 year business executive, and 50 year handicapper.