Starting with the 2009 crop, I began studying a foal’s precocity as it may relate to pedigree. The Precocity Index Project will be my attempt to assign a number to a sire and/or dam based upon how early their progeny break their maiden. The ‘pi’ – precocity index – will only attempt to measure early development and not any other trait such as quality. The ‘pi’ is on a scale of zero to 1500. The lower the number the more precocious the progeny are. Higher numbers will report slow developers. (Note: slow developers definitely do not mean poor runners, e.g. ZENYATTA broke her maiden later in her three-year old season).
The table below lists the ‘Precocity Index’ of sires of North American runners.1 The sires with less than 5 maiden winners since March 1, 2011 (for horses foaled on or after January 1, 2009) will be marked ‘~’ to denote the uncertainty of the score. The sires without a maiden winner since March 1, 2011 will be marked ‘*’ to denote the lack of score.
SIRE – PRECOCITY INDEX
Last Update – 19:36, January 2, 2013
(For the purpose of this study maiden winners will only reflect those which broke their maidens in the following types of races: maiden special weights, maiden claiming, and maiden optional claiming. At this time, the statistics will not include the accomplishments of those which broke their maiden in other classes of races.)
1 – DISCLAIMER: While every effort has been made to insure the correctness of the above data, this blog and its author assumes no liability for any mistakes in the above information. Additionally, any possible post-race disqualifications affecting wins may not be reflected.