TGI averages -- Colts v. Fillies

[mnickolas]

I went through the ThoroGraph sire stats from about 500 different horses recently and culled out the TGI and win percentages of each sire\'s male and female offspring separately.

As you might expect, the differences varied widely with the average being that a male offspring\'s TGI is better than the females by almost 3 full points.  

However, about 10% of the sires show their  daughters with equal or higher TGIs than their sons. While some can be discounted because there weren\'t enough offspring to make it too significant, but the vast majority are from active sires.

Anyone have strong theories about these sires with stronger daughters? I\'ve read a lot about the X-factor issue recently and wonder if I\'m seeing evidence of that (since sires can\'t pass the gene to sons, only to daughters) through these numbers?

Thanks, Mark

[Delmar Deb]

I don\'t have a theory, but I can tell you from observation that from his first crop, the Coronado Quest fillies outperformed the males, both in overall wins and stakes races.  

In fact, after the 3rd one won first time out, it became one of my favorite debut handicapping ploys - and still produced prices ($28 on a Zito entry at Aqueduct).

It will be interesting to see what happens with his offspring now that he is going to Japan.

[marcus]

I\'ve been noticing when doing my handicapping w/ \'04 as a possible exception (unknown thus far ) that the fillie crops or at least a very high percent of the girls of the past few years had better and sounder type patterns overall at 2 & 3 yo & 3+ up  \"generally speaking\" than do colt\'s  .