Spanish Steps

bdw0617 · Postby **bdw0617** » Sun Sep 09, 2007 11:08 pm

When you compare him to his full brother, Unbridled's Song... 5k is a hell of alot of value.

but it got me to thinking. If I have the exact same bloodlines. The horse sold for 280k as a yearling, he had to have something about him that was positive (I would think)

How do Full brothers to stallions do? Is it worth it at 5k?

ovbiously the yearlings are looking pretty good. Spanish Song just had one sale for 200k (off a 10k stud fee)

I know unfortetable max actually ran, but he's reeping the benefits off of what his full brother (Afleet Alex) and wasn't a bad horse, was graded stakes PLACE.. but he got over 75 mares this year.
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I know that mr. prospector had an unraced full brother who didn't get anywhere near the opprotunities that mr. p did, but the ones he did he knocked them out the park (or at least as much as you could expect)

madelyn · Postby **madelyn** » Mon Sep 10, 2007 5:39 am

I'm an engineer not a scientist, but I believe full siblings are not the same, genetically speaking. Only identical twins have the same DNA.

The cards dealt to a full sibling are from the same "deck" as the sibling, but they are from a pool of DNA. The only exact constant between siblings is the mitochondrial DNA, from the dam. So if you have an outrageously fantastic female family, chances are an unraced, or lightly raced sibling might actually get a chance at stud. With a full sibling, I think you are dealing with about 50% common DNA. With a half sibling, it drops to 25% or so. So the boost by being related might be more of a market thing. I evaluate each stallion on his own merits, not on who his brothers are.

Nerd · Postby **Nerd** » Mon Sep 10, 2007 7:04 am

little detail here--even if the stud did inherit the same mitochondrial DNA, it's not like he'd be passing it on short of a sex change operation.

You are correct with the full siblings sharing, on average, 50% of their DNA. Depending on the luck of the draw during gamete formation, they could share anywhere from 0% to 100%, so I would say that with full siblings you sure have a higher chance of both inheriting that certain je ne sais quoi but you need to CHECK to make sure it's there--whether that means similar track success or proven success in the shed is up to you...

madelyn · Postby **madelyn** » Mon Sep 10, 2007 7:17 am

Sorry I didn't complete my thought. You are absolutely correct, the stallion cannot pass on the MDNA. But the market perception for an unraced or lightly raced sibling to a heavy hitter would be much more favorable if the female family was fantastic. So the unraced or lightly raced dud would get a CHANCE at stud.. which if it was a lightly raced or unraced sibling to a stallion very light on the dam side, it would most likely only get a CHANCE in someone's backyard.