And repeating the words of caution regarding relying on dosage:
Originally Posted by walkermac
Consequently only the most rudimentary analysis can be performed and it is entirely superceded by an individual horse's actual race record. It's possible that DNA analysis will be able to better achieve some of the aims of Dosage in the future, but it's unlikely that that information will be in the public realm - unlike a horse's pedigree.
To give an idea of how much information you can potentially get from a DNA analysis today, here is a sample report from one operator: https://www.plusvital.com/wp-content/uploads/2019/04/10107-Plusvital-Gemini-SGT-Final-Customer-Report-EUR-Linked.pdf.
There is some interesting explanatory material at the back of the document, including why distance racing in Australia is so weak. With respect to pedigree analysis they write:
Canít I infer this information from the pedigree?
No, not to the same level of confidence. Pedigree effectively tries to infer which traits are passed on through the generations, so it is essentially a crude attempt at genetics. However, genetics determines what specific gene types have
been passed on, and therefore, is a better predictor than pedigree. As genes are inherited in pairs, one from the dam and one from the sire, it is very common for full siblings to inherit different combinations of gene variants, and thus, they can be completely different types of racehorses. This is the reason why genetic testing is more accurate than pedigree alone. In the case of the Speed Gene Test, we regularly encounter trainers/owners who mistake the Speed Gene type of their horse, despite a thorough understanding of the pedigree and other information from the gallops, racetrack, etc. This can result in racehorses being run at distances which are unlikely to produce the best result for that racehorse.