Ok, first…it’s a maiden mare and thus won’t have a production record.
OP, I hope you can help this mare find a good broodmare home, and for that I don’t have any help.
I have raised only a very few foals, bred a couple of mares. But my job is raising beef cattle for seedstock, our main income source is from selling breeding bulls.
If you want good bulls to sell, you have to have good cows to produce them. You’re not going to get a superstar bull from a mediocre cow, and by mediocre I mean mothering ability, milk production, general thriftiness.
The female provides pretty much half the genetic material for the baby, but all of the environment. The quality of her immune system will have a very large effect on the baby in utero, and for several months after birth with regards to colostral antibody quantity and quality. And then her mothering ability will make a difference to the stress levels and ‘learning to be a horse’ (or cow) for the baby she’s raising.
We used to do quite a lot of embryo transfer here, and eventually figured out that if an ET calf was going to be notable, its recipient mama had to produce superior calves in the first place. A mediocre or subpar cow pretty much gave us an embryo transfer calf that was also mediocre or subpar. Yes, it had the ‘best’ genetics, and a female would usually grow up to be a good cow, but it was a fail if we were trying to sell the male calves as bulls.
It used to be that DNA was thought to be a permanent fixture, we now know that ‘Epigenetics’ is a factor. This means that environmental factors can affect whether or not specific genes are turned on, or turned off. So expression of genetics can be affected by environment. These effects can happen to the parents producing sperm/eggs, they can happen in utero, they can happen after birth. Toxicities, undernourishment/nutritional deficiencies, extreme stress etc can have an effect on genetic expression.
This meant that, if we wanted a good embryo transfer program, we would either have to buy unregistered/unregisterable cows that were excellent producers to raise ET calves, or take our own good registered cows and have them raise some other cow’s calf. We decided to concentrate on having good cows raise their own good calves, via AI breeding which we already do anyway.
But yes, a broodmare prospect from bloodlines known to be good mothers is a much better bet to produce quality foals than something mediocre, subpar or unknown.
