Whole genome study looked at racing performance, distance, surface and height. Developed a scoring system of grades ABCD for racing performance and established the incidence of the grades at sales. Markers include a female-specific SNP. They also found a marker that is specific to Mr. Prospector horses, a SNP that's only present in the good Mr. P horses, and not in the non elite horses.
Data predicts that you can eliminate 50% of individuals on a short list at sales and retain 75% of the GSWs. Blind test found the 6 GSWs hidden among 55 moderate horses. Population is10% As, 40% Bs 40% Cs 10% Ds
Tested 27 G1 sprinters and all were homozygous for sprint genotype. But several horses who won the Kentucky Derby were homozygous sprinters. Race pace is crucial in American racing.
There are multiple SNPs strongly associated with different surfaces, some associated with muscle enzymes.
Matthew ends with perhaps the most appropriate comment of the day:
This is real and it's coming, and we hope that you will embrace it.
Almost all quarter horses are CCs, almost all Egyptian Arabians are TTs. Thoroughbreds, elite graded stakes winning horses, show what you would expect, more CTs than anything else, your basic normal distribution, slightly skewed in favor of CCs. National hunt (steeplechase) winners on the other hand are heavily skewed toward TTs, but no CCs at all.
New Equinome research published today, new study indicates that the myostatin gene is the most powerful indicator of best race distance. Says Equinome's marker performs 15 times better than any other marker in predicting best racing distance.
What genes are responding to exercise. Certain genes activity are significantly enhanced after exercise. The response increases over time as a result of training. It prepares the system to be able to be better able to respond to exercise.
Over 5k genes present in skeletal muscle. After year of training 16 genes increased activity and 58 decreased, The gene that changed the most was myostatin. Decreased its activity over 4 times.
Bob shows that the distribution of phenotypes of classic winners and leading sires has changed drastically since 1970s. Breed has gotten larger, lighter, more powerful, and not as balanced as they used to be and much less consistent. 2000s starting to be a little more consistent.
Secretariat turns out to be a critical horse in terms of biomechanics....His phenotype helps pull the breed back toward balance, through horses like A.P. Indy, Storm Cat, and Gone West.