I've tried to collate the relevant points from the discussion in one go, apologies to anyone who has made a point that I've missed.......
‘’Any pedigree analysis must of course take account of the dam side. The dam is all important (accounting for half of an individual’s genetic make up) especially if the stallion is not exerting prepotent influence. However, because the sample of progeny from any given mare is so small conclusions are often unreliable and consequently the attention often focuses on the dam sire (with an invariably hugely greater and consequently more reliable progeny sample)’’
‘’ prepotency is just as likely to come from the dam as the sire.’’
‘’In fact, because there are far more mares at stud than stallions, the most (and least) prepotent horses will be mares. A larger population will have more members at the extremes of the "prepotency distribution curve" than a smaller one’’.
‘’As for the age of mares and their earlier foals being, in general, better than their later ones, there may be something in this, but there's also an element of self-fulfilling prophecy about it’’
‘’Neither side of a pedigree has a monopoly on prepotent influence. It occurs where it occurs and is unique to that particular pedigree.’’
‘’In fact, you might argue the dam has the bigger influence, as she will also raise the individual and so has an environmental, as well as genetic, influence on her progeny. Some would also argue the age of the mare when foaling is a big factor - the uterus of an older mare being sometimes less efficient. As SteveM points out, mars will only ever have a limited amount of progeny compared to the average stallion’’.
‘’Personally, I think stallions are like jockeys, there is not a lot between the good ones but there is a gulf between the good ones and the next ones. I also think some bloodlines are more reliable than others. Darshaan mares were all in a few years ago and now the Danehill mare line has produced three or four group winners in a month. It ebbs and flows a bit like the form of some stables. There's no exact science and sometimes its just a lucky run’’.
‘’plenty of mares that for one reason or another that have been unable to show their worth on the racecourse and have been poor performers can still throw out useful performers of their own’’.
‘’On the topic of when the mare produces her best progeny. I played with this a little bit and found a general trend for it be in the the third quarter of her foals. Then you get mares who have a record for consistent production (Urban Sea, Brooklyn's Dance, Jude, Maryinsky) who put your stats off.....’’
So all this serves (I think) to tell us...
Of course the Dam has an influence as you'd expect. But as we know there is no exact science, or all of us would only ever be backing winners all day. No chase, no fun!! Well, maybe not 'no fun' but definitely the thrill gets diminished if you're not fighting for it.
The samples are too small in general, the fluctuations in prepotency (great word) not possible to be certain of. Impossible to tell who out of the parents exerts the greatest influence.
So is the only way to make use of a combination of sire/dam influence by analysing past results, looking for races where an unexpected result occurs which involves a (potentially foreseen) strong sire offspring winning (or running well)....and then looking to see if there are further clues in the dam.
A good example maybe:
The 4.35 Navan 10th Oct
There's a Whipper offspring running - Morga. Ran well FTO about 5 days earlier. Every chance he could turn out to be nice, so theoretically might be worth an interest at the 13s/14s available.
About 1f out he looks like collecting, only to be chinned (well, lengthed) by a Dubawi runner - Dubaya - in the last 50-100 yards, both well clear.
The exacta paid a mouthwatering €900 odd, though unlikely with 15 runners that anyone might have gone for it.
So is there anything in Dubaya's breeding (on top of the obvious Dubawi influence) that might have alerted us before the race to the potential.
2-y-o (03May10 b f)
Dubawi (IRE) (9.1f) — Charlecote (IRE) (Caerleon (USA) (10.7f))