Sex Selection in the Sire


It is not easy to track genes in racehorse families. Occasionally, statistics can indicate that there is sex selection in the sire. The catalogues have started to arrive so how do we use the information to buy a winner? Well, it is a useful document to find most the information in one place. However, a catalogue is unashamedly a selling document and to improve your chance of success you need to know more.  Sometimes the information that is not there is just as important. Both sides of the pedigree require more data. Here is a tip for the male side.

Performance of the Sire

This information can be found in the Australian Stud book or, or a number of similar data bases.  The data shows things like stallion fees, winners/runners, best performers, premiership tables, siblings etc. However, sometimes you have to dig deeper than this. To illustrate the sort of information which could be useful in your investigations let’s look at the stallion performance of Foxwedge (Fastnet Rock-Forest Native).


Foxwedge was an excellent racehorse. In the G1 William Reid he pushed Hay List and Buffering into second and third places.  As a Sire he has a winners/runners ratio of 43.7% which puts him close to horses like So You Think (44.4%) and Nicconi (41.7%). However, what makes his performance worth another look is the fact that his progeny has won three of the highest quality G1 races. Not all G1 races are the same no matter what some industry people say. The table below lists some of the important winners of these races that have been won by his daughters.

All three of Foxwedge’ s G1 winners are fillies. Further investigation shows that of his 18SW, 15 are fillies and 3 are colts. Is there some sort of sex bias operating here? Is it a case of sex selection in the sire? Well, that may be true to a small extent as In the 2013-2015 crops there are 178 fillies and 142 colts.  However, this difference would not explain the SW disparity. It could be chance or is there is a sex-linked factor expressed in the X chromosome of Foxwedge that is related to racing performance. This gene is reinforced by the X chromosome in some of his mares. How do you use this information? If you are interested in Foxwedge progeny, give preference to the fillies. At a service fee of only $11,000 they are definitely worth a look.

Capricornia Yearling Sales 2020

Capricorn Yearling Sale 2020

The Sale begins on April 5th.. With all the distractions around I hope the organizers will be rewarded for their considerable effort. There are 91 Lots representing 39 Stallions. and  interesting yearlings from Domesday and Foxwedge. The stallions fall into three groups

  • Established proven sires of Stake Winners who some people believe are past their best. (Holy Roman Emperor (67SW), Domesday (18SW), Falvelon (11SW))
  • A few up and comers, Foxwedge (15SW) )
  • The majority trying to make their mark or just starting off.

To discuss, I have selected Lot 14 and Lot 82.

Lot 14 (Domesday- Halle Mcollywill)

I have talked about Domesday (18SW, 5x G1) before. Lot 14 is the only horse that I can find in the Sale where the sire has produced a SW from a match to a SW brood mare sire. In this case Mossman.  The horse was Cailin Miss (Domesday – Partygoer by Mossman). She only had 4 starts and won a Listed race in South Australia. Since retiring she has visited some heavy hitting mates. In order Foxwedge, Snitzel and I Am Invincible which shows someone believes in her quality. A PRI score of 85.6 points to a city winner. Although her 6GFI is a modest 4.8%, the action around the dam is very good (1xG1, 1xG2, 3xG3 and 1xL).  The mating to produce Lot 14 is a wide outcross. No Danehills anywhere to muddy the waters .Although Domesday’s best horses have been colts; this filly would be worth a look.

Lot 82 (Foxwedge – Burleigh Bullet)


Foxwedge     Young sire on the way up

If you are looking to buy from a sire on the way up, then Foxwedge is for you. His oldest progeny are only 5 yo and he has already produced 15SW.  His three G1 winners are widely spread; New Zealand, Western Australia and Ireland.  Urban Fox (Foxwedge-Lomapamar) easily won the Pretty Pretty  Polly Stakes in Ireland. This race is regarded as a useful guide to the English Oaks. Lot 82 with a 4mx4m cross to Storm Cat is related to Sadilla (Foxwedge-Saderaat) winner of a listed race in Italy over 2000m. Lot 82 has Storm Cat 4mx3m. Another things this filly has going for her is that of the 15SW sired by Foxwedge, 13 are fillies and 2 are colts.

Both these interesting  yearling from Domesday and Foxwedge are worth a look.