Measuring Ancestor Appeal
by Roger Lyons
Recent posts about Dixieland Band and Graustark preceded their broader context, which arrives as a table, titled “Ancestor Preferences of Major US Sires.” The table covers 164 ancestors and reflects, among other things, how well or poorly individual ancestors of broodmares are playing to the contemporary stallion population. Links to three different versions of the table are provided below.
The table is very simple once you catch on to the concept. To over-simplify, there’s about a 31% chance that a stallion whose name you pick out of a hat is going to react well with Storm Cat in the ancestry of a mare and only about a 9% chance of an unfavorable reaction. That leaves about 60% that do okay with Storm Cat, but not many breeders dream of results that are okay.
If your mare is by Storm Cat, the odds are not bad that you’ll draw a suitable stallion by chance, at least in that respect. However, if her dam happens to be by Halo, with which only 13% of the stallion population react favorably against the 22% that react unfavorably, it’s more complicated. Thus do questions of compatibility arise from the layers of a mare’s ancestry.
Clearly, the breeding of some mares renders them far more flexible as to the selection of a mate than other mares. Ideally, you would want a stallion to have high stike rates with a mare’s entire ancestry. Some mares may have a range of such options, but for other mares there’s no such stallion.
Anyway, for each ancestor, I surveyed 71 proven sires to determine, first, how many of them sired foals out of at least 10 mares in some descent of the subject ancestor. Second, the qualifying sires were divided into two groups: 1) those that, from mares in some descent of the subject ancestor, had strike rates significantly above their overall records and 2) those that had significantly lower strike rates with those mares.
Here’s the legend for the resulting table:
Ancestor–the subject ancestor as represented by broodmares.
Sires–the number of stallions (from among the 71) that sired 10 or more foals with mares representing the ancestor.
Approve–the number from the “Sires” group with significantly higher-than-average strike rates.
Approve%–the percentage of “Sires” with significantly higher-than-average strike rates.
Disapprove–the number from the “Sires” group with significantly lower-than-average strike rates.
Disapprove%–the percentage of “Sires” with significantly lower-than-average strike rates.
There are three versions of the table, one listing 164 ancestors by “Approve%” rank to show them in order of the frequency of high strike rates by the stallion sample; another listing them by “Disapprove%” rank to reflect the downside risk; and then an alphabetical listing so you can have fun looking them up individually.
Bear in mind, the survey includes only US sires. Danzig’s approval rating of only 14% and disapproval rating of 23% would be vastly different based on a survey of European or Australasian sires. Nevertheless, Danzig is a problem for a lot of US stallions.
I’ll comment further on this table in future posts, beginning with the reason why Native Dancer’s approval rating is the lowest in the list.
Posted by Roger Lyons on Wednesday, February 16, 2011 at 7:04 am.
The Travails of Drosselmeyer
by Roger Lyons
Distorted Humor gets at least one superior runner out of about every seventh or eighth mare that produces at least one foal by him, counting winners of unrestricted stakes and horses that run at least second in a G1 or G2 race. In order to have a record like that, a stallion has to have a broad reach into the genealogical range of the broodmare population. Yet, inevitably, even the best stallions are challenged by certain otherwise important influences.
This brings up the interesting case of Drosselmeyer (Distorted Humor-Golden Ballet, by Moscow Ballet). He qualified as a superior runner in my system when he beat every horse except Fly Down in the Dwyer S. (G2), but anyone who’s watched the horse could see he has talent. Even so, he still hasn’t won a major stakes, nor was he able to meet the expectations represented by his challenging route to qualifying for the Kentucky Derby despite talent superior, arguably, to some of the horses that actually did qualify. For some reason, Drosselmeyer hasn’t been able to keep the promise. It’s a mystery.
It happens that Drosselmeyer’s dam, Golden Ballet, by Moscow Ballet, represents one of Distorted Humor’s most prickly issues with the broodmare population. Distorted Humor is out of a Danzig mare, and popular thinking about pedigree would suggest that Distorted Humor would work well with mares that resonate with Danzig, mares that have strains of Northern Dancer, the dams of which, like that of Danzig, trace to Teddy–maybe even mares that return Danzig himself.
Well, it isn’t so. The two most notable Northern Dancer strains whose dams trace to Teddy are Nijinsky II and Storm Bird. Of the 68 mates with Nijinsky II in their ancestries through Distorted Humor’s 2007 crop, only five have produced superior runners; and of the 56 mates with Storm Bird in their ancestries, only four have done so. What tells the tale, though, is that not even one of his 27 mates with Danzig in their ancestries has produced a superior runner.
The problem is that Distorted Humor wants strains of Northern Dancer whose dams contrast genealogically with his own strain, which is Danzig. After all, four of his seven mates with Sadler’s Wells in their ancestries have produced superior runners. Obviously, the problem is not Northern Dancer, with which Distorted Humor has an average strike rate overall in spite of his poor records with Nijinsky II, Storm Bird, and Danzig.
Drosselmeyer’s mysterious problem could be that he is out of a Nijinsky II-line mare whose second dam is by Storm Bird. Fortunately, on the other hand, his dam has a lot going for Distorted Humor.
Moscow Ballet, although by Nijinsky II, is out of a mare by Cornish Prince, with which Distorted Humor has a strike rate of 3/13. The big push, though, probably comes from Slew o’ Gold, sire of Drosselmeyer’s second dam, with which Distorted Humor has a strike rate of 2/6. That’s confirmed by his strike rates of 14/88 with Seattle Slew and 22/137 with Slew o’ Gold’s broodmare sire, Buckpasser.
How Drosselmeyer’s complex pedigree mix will resolve in his Belmont effort remains to be seen, but a horse’s pedigree is his fate, and fate gives no quarter.
Posted by Roger Lyons on Monday, May 24, 2010 at 9:00 am.
Pedigree Profile: Lookin at Lucky
by Roger Lyons
Lookin at Lucky (Smart Strike–Private Feeling, by Belong to Me) is out of a mare whose genealogical profile as a mate for Smart Strike currently ranks her at the 96th percentile among mares that have produced foals by him through his 2006 crop. This percentile rank is based on an aggregation of Smart Strike’s rate of production of superior runners from mares representing individual ancestors of the subject mare–in this case, Private Feeling. Basically, the purpose of the profile is to measure how well the ancestry of the subject mare matches up with Smart Strike based on the preferences he has shown. If a given ancestor has proven significantly favorable to Smart Strike relative to opportunity, it contributes positively to the aggregate profile and percentile rank. An ancestor that has proven significantly unfavorable negatively affects the profile and percentile rank.
No knowledgeable observer would be surprised that a stallion by Mr. Prospector would have a relatively low strike rate with mares contributing Raise a Native. The redeeming factor for Smart Strike is that his strike rate with mares contributing Northern Dancer has generally been slightly above average. It happens , though, that Smart Strike has an exceptionally favorable response to Private Feeling’s specific expression of these two important ancestors.
Her sire, Belong to Me, is bred from a Danzig (Northern Dancer)–Exclusive Native (Raise a Native) sire-line cross. Through his 2006 crop Smart Strike has sired foals out of four mares by Belong to Me, and two of those mares produced superior runners by him, including Papa Clem, winner of the Arkansas Derby (G2) and San Fernando S. (G2), and Striking Tomisue, winner of the Wayward Lass S. Lookin at Lucky’s dam is Smart Strike’s third mate by Belong to Me to produce a superior runner by him. In short, it’s a nick.
When Werk Thoroughbred Consultants first recommended this mating, however, the Smart Strike–Belong to Me nick was not yet established. Get that story here.
As is typical of a broodmare sire that crosses well with a particular stallion, Smart Strike’s numbers with ancestors in the background of Belong to Me are very solid. Through male strains of Danzig, he has a strike rate of 6/45 through 2006 and has three additional superior runners from his 2007 crop, including Lookin at Lucky, of course; On Verra, runner up in last year’s Prix Marcel Boussac (G1); and Zanzibari, winner of last year’s Prix de Cabourg. Smart Strike’s overall record with Danzig, including female strains, is reflected in his strike rate of 11/76 with Pas de Nom, notable predominantly as the dam of Danzig. He is 9/79 with Hail to Reason, sire of Belong to Me’s second dam, through female strains and has a strike rate of 3/12 with No Fiddling, Belong to Me’s third dam.
Smart Strike’s record with the ancestry of Lookin at Lucky’s second dam, Regal Feeling (Clever Trick–Sharp Belle, by Native Charger) is not nearly as conclusive, mainly for lack of opportunity. He’s had opportunity with only seven mares with Clever Trick through female strains and no superior runners to show for it, other than Lookin at Lucky. However, the background numbers suggest potential, given more opportunity. With Clever Trick’s sire, Icecapade, he’s 2/20 and with Native Charger 1/6, which is good enough.
One peculiarity of Private Feeling’s ancestry is that she’s inbred to Northern Dancer 3×4 through a male strain (Danzig) and a female strain (Sleek Dancer, Private Feeling’s third dam). Some pedigree analysts regard inbreeding through sex-opposite strains as an absolute pedigree value, but the numbers show that many stallions respond differently to male and female strains of certain ancestors, including Northern Dancer. It happens that Smart Strike has the fairly good strike rate of 4/24 with female strains, but only an average 46/384 with male strains. Accordingly, with mares inbred to Northern Dancer through mixed-sex strains his strike rate is only 1/17, not counting Lookin at Lucky or any of the opportunity in his 2007 crop. For Smart Strike, sex-opposite strains of Northern Dancer generally collide with one another, but not in this case.
He has a strike rate of 6/46 with mares inbred to Northern Dancer through all-male strains, but that’s deceptive because in all six cases Danzig was one of the strains. So, on the whole, Private Feeling’s Northern Dancer influence can be deemed highly favorable to Smart Strike only because of Northern Dancer’s descent through Danzig and a female strain. It’s not because they’re sex-opposite strains. It’s because, despite his preference for female strains, he just happens to like Danzig especially well.
Another issue is that Private Feeling has five strains of Native Dancer within six generations, two through males (Raise a Native and Native Charger) and three through females (Natalma, the dam of Northern Dancer in two cases and Shenanigans, the dam of Icecapade in one case). As in the case of Northern Dancer, Smart Strike responds differently to Native Dancer depending on the sex of the strains. With female strains of Native Dancer he has the significantly favorable response of 47/359, and, remember, Private Feeling has three female strains. This makes sense in that Northern Dancer confers a female strain of Native Dancer while Raise a Native confers a male strain. Accordingly, with male strains Smart Strike has a strike rate of only 7/128. Of course, in Private Feeling’s case this response is conditioned by Native Dancer’s descent through male strains to which Smark Strike has proven amenable. So, overall, Private Feeling’s Native Dancer load leans very heavily in Smart Strike’s favor.
I should add, too, that the breeding of Belong to Me’s dam, Belonging, broadly reflects Smart Strike’s Raise a Native–Turn-to sire-line cross and, therefore, constitutes a linebreeding pattern. Smart Strike’s strike rate with mares that return to him that pattern, including all its possible forms, is 5/65, just a bit below his average, not bad at all. There can be no doubt that linebreeding can serve to mediate type, but, among superior runners, the numbers only very rarely warrant a pedigree interpretation that casts it as a decisive factor. At best, linebreeding has only limited functional relevance in Lookin at Lucky’s pedigree context.
The linebreeding of Lookin at Lucky is one thing, but the linebreeding of his dam, with her build-up of Native Dancer, is quite another. Much of that is favorable to Smart Strike, but mainly because of the specific ancestors through which it is expressed. In no way could a build-up of Native Dancer in the ancestry of a mare otherwise be taken as an encouraging factor for Smart Strike. It all depends on how that build-up is expressed, and Smart Strike is extremely particular about that. Private Feeling’s distinctive expression happens to suit Smart Strike especially well, but there are lots of ways it would go wrong for most other stallions.
Posted by Roger Lyons on Thursday, April 8, 2010 at 9:06 am.
• Permalink • 1 Comment »