True white.
I was wondering if true white could be added into the game by putting in genes for dominant white.
Like this TB:
Like this TB:
Re: True white.
It's in the plans, but it's a big project, because there isn't just one 'dominant white' - there's multiple mutations that can cause a solid white horse, and most of them are mutations of the same gene, KIT. The ways they vary individually are complex enough, but when you add in the fact that a horse can have two different forms of dominant white, it turns into, well, a huge amount of art planning because of the ways the different mutations interact. There are actually books for equine artists that deal extensively with how white patterns interact for just that, since it's not as simple as layering one over the other. We'll have them eventually. I don't know if the plan is to add them one by one or in batches, but they'll come. I don't know if we'll get all of them, though, since there are more than most people realize. Over twenty, in fact.
Here is a list of all of the mutations on that gene (KIT) which go by 'dominant white' : http://www.etalondx.com/dominant-white
There are two other white patterns found at that locus - Sabino1 (classic sabino overo) and dark-headed roan. We actually have the latter in the game already! It's the easiest white pattern to deal with since it doesn't really interact with the others.
Some of the dominant white genes produce somewhat minimal patterns, including patterns that would probably be called sabino overo, but geneticists have decided to use the term sabino for just the one, so don't mind the dominant white mutations that produce minimal markings like W20. It's just scientist talk. It rarely matches up with fancier talk.
In addition, tobiano's location in the genome is super close to KIT, close enough that they are usually inherited together, and thus, Tobiano can usually be treated like an allele of KIT. That's why you often don't see horses that are homozygous for tobiano with other KIT-carried white patterns. It can happen in rare instances of crossing over as egg or sperm are formed.
The only white patterns that are inherited completely separately from the ones on or near KIT are splashed white overo and frame overo. There's three forms of splashed white (two on one gene, one on another) and frame overo stands alone. Frame would actually be the easiest white pattern to add for that reason, but of course the solid white horses produced by it don't live very long!
Here is a list of all of the mutations on that gene (KIT) which go by 'dominant white' : http://www.etalondx.com/dominant-white
There are two other white patterns found at that locus - Sabino1 (classic sabino overo) and dark-headed roan. We actually have the latter in the game already! It's the easiest white pattern to deal with since it doesn't really interact with the others.
Some of the dominant white genes produce somewhat minimal patterns, including patterns that would probably be called sabino overo, but geneticists have decided to use the term sabino for just the one, so don't mind the dominant white mutations that produce minimal markings like W20. It's just scientist talk. It rarely matches up with fancier talk.
In addition, tobiano's location in the genome is super close to KIT, close enough that they are usually inherited together, and thus, Tobiano can usually be treated like an allele of KIT. That's why you often don't see horses that are homozygous for tobiano with other KIT-carried white patterns. It can happen in rare instances of crossing over as egg or sperm are formed.
The only white patterns that are inherited completely separately from the ones on or near KIT are splashed white overo and frame overo. There's three forms of splashed white (two on one gene, one on another) and frame overo stands alone. Frame would actually be the easiest white pattern to add for that reason, but of course the solid white horses produced by it don't live very long!
Re: True white.
Okay, thanks, I didn't know that.equagga wrote:It's in the plans, but it's a big project, because there isn't just one 'dominant white' - there's multiple mutations that can cause a solid white horse, and most of them are mutations of the same gene, KIT. The ways they vary individually are complex enough, but when you add in the fact that a horse can have two different forms of dominant white, it turns into, well, a huge amount of art planning because of the ways the different mutations interact. There are actually books for equine artists that deal extensively with how white patterns interact for just that, since it's not as simple as layering one over the other. We'll have them eventually. I don't know if the plan is to add them one by one or in batches, but they'll come. I don't know if we'll get all of them, though, since there are more than most people realize. Over twenty, in fact.
Here is a list of all of the mutations on that gene (KIT) which go by 'dominant white' : http://www.etalondx.com/dominant-white
There are two other white patterns found at that locus - Sabino1 (classic sabino overo) and dark-headed roan. We actually have the latter in the game already! It's the easiest white pattern to deal with since it doesn't really interact with the others.
Some of the dominant white genes produce somewhat minimal patterns, including patterns that would probably be called sabino overo, but geneticists have decided to use the term sabino for just the one, so don't mind the dominant white mutations that produce minimal markings like W20. It's just scientist talk. It rarely matches up with fancier talk.
In addition, tobiano's location in the genome is super close to KIT, close enough that they are usually inherited together, and thus, Tobiano can usually be treated like an allele of KIT. That's why you often don't see horses that are homozygous for tobiano with other KIT-carried white patterns. It can happen in rare instances of crossing over as egg or sperm are formed.
The only white patterns that are inherited completely separately from the ones on or near KIT are splashed white overo and frame overo. There's three forms of splashed white (two on one gene, one on another) and frame overo stands alone. Frame would actually be the easiest white pattern to add for that reason, but of course the solid white horses produced by it don't live very long!