Thanks for providing. It is very interesting reading in contemplating the future direction of thoroughbred breeding for flat racing in England/Europe generally. Maybe I'm just sentimental or a bit old fashioned in my thinking or out of touch with modern genetic theory/analysis as regards the importance of outcrossing in breeding among closely related lines (guilty on all counts I admit); but I am a bit saddened/perturbed by this note in the analysis of sirelines represented by this Tattersalls' catalog......
... The Indian Ridge/Ahonoora branch of the Djebel line, represented by just a single yearling by Compton Place, has almost disappeared from the catalogue..
Looking ahead when the best of this lot are proven race horses/G 1 winners....and are retired to stud/breeding careers....who will be brought to them? Their 'half sister' or 'first cousin' (so to speak, in "human" terms)? Mind you this is NOT a reference to thoroughbred breeding being 'incestuous' - but rather a concern about where future outcrossing strength will come from?
Thought about this a bit more......maybe the answer is that the females in a pedigree are the continually interwoven 'diverse' strands from various origins that 'are' strengthened when continually 'plaited' with sire line DNA strands that have been selectively bred/evolved to the extent that they largely represent variations on a theme, the Northern Dancer or the Native Dancer theme? There is something to be said in getting consistency of character - of 'type' - down such that you some predictability as to physical and performance expectations from a resulting cross. Setting "type" for selectively bred individuals has historically been based on inbreeding to the 'same' significant individual or his heirs that meet the definition/expectations of that "type-y" model being sought.