HGG Community Forums

What are you trying to do?

Yes there is a genetic component to height. For example

Tall Height Example

If I breed this mare CW Starry thats 17.2 hands to a stallion DBLE2 Khan Special wthay that is also 17.2 hands this is what I ended up with:

Foal 1: 17.0
Foals 2: 18.0
Foal 3: 17.1
Foal 4: 17.3
Foal 5: 18.0
Foal 6: 18.0
Foal 7: 18.0
Foal 8: 17.2
Foal 9: 17.1
Foal 10: 17.3

30% Less than 17.2 hands
10% 17.2
60% Over 17.2 hands

I have the option to GMT any of them to the range of 16.3- 18.1 so +-3 when the parents are the same height. I could have gotten 10x 16.3s or 10x 18.1s. I also could have gotten any mix within the range (which is what I got).

This would be the same with any height unless you are asking about the height regulator gene on the minis.

Bone Weight example

If I breed this mare 13579497 thats 1.52 Bone to a stallion 13579498 that is also 1.41 Bone this is what I ended up with:

Foal 1: 1.37
Foals 2: 1.38
Foal 3: 1.53
Foal 4: 1.60
Foal 5: 1.54
Foal 6: 1.58
Foal 7: 1.49
Foal 8: 1.48
Foal 9: 1.42
Foal 10: 1.58
Foal 11: 1.50

5/11 Light Bone
6/11 Medium Bone

I have the option to GMT any of them to the range of 1.17- 1.77 so +-.30 when the parents are the same height. In this case 1.52 (mare) + 1.41 (stallion) /2 = 1.46 =-.30

This would be the same with any bone weight. I used light and medium for this example so it was easier to see.

Opposite Heights Example:

It would be similar if you bred a 12.0 mare to a 17.0 stallion the "average" or middle height would be 14.2 hands. So the range of offspring would be 14.2 hands +-3 to give a range of 13.3-15.1 hands possible for any offspring from a 12.0/17.0 pairing.

@Seraphim falls based on my research yes and no. Real life genetics aren't guaranteed with sizes, and its a grey area. Some say the foal splits the difference and some say it'll be random.

@cottonwoods
I'm trying to breed the biggest horses I can for both height and weight

Thank you so much for taking the time to give me such in-depth answers!