Bloodline to Bloodline

[MountainMeadows]

Hi John

I was wondering if you believe that certain bloodlines when crossed with other certain bloodlines are more likely to produce a dwarf (parents are all beautiful with no dwarf characteristics). I have noticed that problem with a couple of bloodlines that I will keep private (you are welcome to PM me) - it seems that when they are crossed that there is a higher incidence of dwarfs produced than when crossed with other bloodlines - enough so, to make me question whether the dominant gene theory might also correspond to an "attraction"theory - for sure not wording this correctly, but I imagine you get the gist of it.

Thanks John

Stacy

 

[Arion Mgmt]

"Hi John

I was wondering if you believe that certain bloodlines when crossed with other certain bloodlines are more likely to produce a dwarf (parents are all beautiful with no dwarf characteristics). I have noticed that problem with a couple of bloodlines that I will keep private (you are welcome to PM me) - it seems that when they are crossed that there is a higher incidence of dwarfs produced than when crossed with other bloodlines - enough so, to make me question whether the dominant gene theory might also correspond to an "attraction"theory - for sure not wording this correctly, but I imagine you get the gist of it.

Thanks John

Stacy"

Stacy,

No I'm sure I get your drift, but I will try. What dominant gene theory are you talking about??? The dominant gene genetic law that is a true genetic fact that exists, its not a theory. My opinion right now about what is going on is a genetic theory that I am working to prove. My theory is that the dwarfisms are caused by recessive genes.

There is no "attraction" theory in genetics with regards to genes. There is a gene linkage fact that is known to be true. It is when two or more genes are located on a chromosome within close proximity of each other and they get inherited all together, or in a higher percentage, from one parent. This is a different ratio than what is seen normally in chromosomal assortment, what is known as Random Assortment of chromosomes.

What you are seeing is that those bloodlines are carriers. Whether they are producing a higher percentage than 25% would be hard to calculate without knowing all the numbers. I would think that you had bad role of the dice. Remember, each foal is in and of itself a separate event, just because you had a gorgeous foal last year does not mean it will be the same next time. Are all your kids identical, (if they are not identical twins I assume), I doubt they are. So what you se is the beauty of genetics, every year is christmas presents, sometimes you get a tie.

When you used the other bloodlines did you get any dwarfs at all?? Again I do not have enough info to really know what you are asking. The only thing I can think of is that the bloodlines you were using and getting alot of dwarfs might have more than one dwarf gene involved because you are not specific on type of dwarfs, I am assumming it could be more than one type you are seeing.

John