Boundary daughter in foal to Big Brown

[bayrabicano]

I was just scanning the article on p 2561 of the Sept 4 Blood-Horse and saw that Border Dispute is in foal to Big Bown.

The mare's owner is quoted "Border Dispute to Big Brown is line breeding because they are both by the same stud (Boundary). That has worked very nicely for me in show horses, so I wanted to try it one time with a proven, very good (Thoroughbred) producer like Border Dispute to see what happened. I was hoping for a colt, and she is carrying a colt."

I know we had the inbreeding/line breeding discussion before, so that's not where I'm going with this. I'm just wondering what the pedigree experts on this board think about this breeding.

[Georgerz]

A similar inbreeding produced a champion many years ago:
Coronation (Fr): Djebel (Tourbillon - Loika) - Esmeralda (Tourbillon - Ranaa)

[LB]

I think that what works in show horses is not necessarily likely to work in racehorses, which require a whole different level of hardiness and fitness.

Big Brown himself is already 3 x 3 to Northern Dancer and 3 x 4 to Damascus, so this is some serious inbreeding--and not line breeding as stated in the quote.

[zinn21]

It will depend on what genetic traits are passed by both sire and dam. Inbreeding allows for more of the same so if it's a bunch of speed, good biomechanics and competitiveness that's good but if it's unsoundness, bad feet or a poor immune system, the foal is in trouble.

[xfactor fan]

Anyone have a conformation photo of Border Dispute? Or knows what she looks like? Is the breeding type to type, or are they trying to "correct" certain traits?

[Linda_d]

It will depend on what genetic traits are passed by both sire and dam. Inbreeding allows for more of the same so if it's a bunch of speed, good biomechanics and competitiveness that's good but if it's unsoundness, bad feet or a poor immune system, the foal is in trouble.

This is the problem with inbreeding (and it's inbreeding not line breeding): both the good AND bad qualities found in the common ancestor(s) can be magnified. Inbreeding also increases the chances that unwanted, even deadly, recessives will appear. For example, inbreeding to an ancestor that was a minimal frame overo might produce a LWO foal from two horses that didn't look frame at all.