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Recently I’ve gone through several sales catalogs, screening sires that appear to dominate progeny i.e. genotype pedigree.
It is ‘telling’ mainly due, how easy some sires line-up & better than others. This is mainly due to the broodmare sire.
It generally heads up pedigree impression; those back strains which compel the breeding.
It is however, also an ‘area’ where unspecific sires can strike, leaving the mark via particular conduit back-strains: gene-domination the super-glue of genetics.
The method to sire seeking, of genetic breeding terrain reminds me how Sir Patrick Hogan, ex-Cambridge Stud New Zealand, evaluated Sir Tristram unseen.
Yet as it goes of any sire….making the impatient conclusion that average isn’t quality, is a mistake. Its perhaps subjective but I opinion some natural law of average, the stallion has its day due to the right mare.
**The right mare has a unique blend, coming together of bloodlines and some strains are simply ‘overlooked’ as ‘if’ they have slipped past, forgotten, only to resurrect.
It dawns upon one, an importance to evaluate yesteryear latent strains which draw through genetic fine-print as the base-line, homogozity, mit.DNA halotype.
There it goes softly, a scarcity value as maternal-bred ‘arises’ from pre-ceding dynamics: pre-shuttling, pre-syndication, sires unknown going short of mares or considered shy breeders in those times but also, just how long-term breeding rolls round and peaks. It is something old stud-masters understood implicitly to the 40year+ span. Dollars to doughnuts, investment breeding, may not?
To writing this blog providing a proof to **accounts above (wink), the principles I assign sit square to the interesting 2 year old filly Dame Giselle by I Am Invincible from Ballet Society ex-Stravinsky, having her first emphatic win from 2 starts.
https://www.pedigreequery.com/dame+giselle
As prior stated… some sires swing it better than others and thus when they are found through maternal infusions, it literally ‘excites’ the pedigree because we start to understand some fundamentals of building the bloodline, and further explains its genotype to racing phenotype.
Dame Giselle’s 3rd dam the GrandSire, Century (Better Boy – Royal Suite) generated two year old sprinters and three year old classic stayers of exceptional physical quality, verve and natural ability…
His sire Better Boy – his success at stud was largely owing to his ability to churn out metropolitan winner after metropolitan winner, month after month, year after year. (credit references Ross du Bourg The Australian and New Zealand Thoroughbred)
Her sire, I Am Invincible, note 2nd dam grand-sire OUR NATIVE (USA) to female family 20-a.
Look to the maternal 3rd dam sire Ramsin/Le-Haar and 4th dam sire Cobalt how they merge and both also of female family 20-a to ancestress Ghuznee 1838.
Remember homozygous: an organism with identical pairs of genes relating to a given pair of hereditary characters, and hence breeding true for those characteristics.
But even so, what plays out is not ALONE rhyme n’ tale duplication but the ‘hotspot’ which has breeders which shape.
Better Boy – ” physiologial and procreative powers were carefully conserved over the years. He was never asked to serve more than 62 mare in any one season and when he was at the height of commercial fashion. Century – demonstrated his ability to sire winners of the highest class over all distance on the flat from 1000 metres to 3,200 metres.” credit reference Ross du Bourg The Australian and New Zealand Thoroughbred.
Back to the drawing board 
Superior pedigrees are the master, evolutionary templates.
English