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Ragtatter · Mar 12, 2018 4:30 PM

Knowing which chromosome a gene is on is interesting, but it's not really useful. Has anyone made a gene guide that says which traits are dominant and which are recessive? For example, for the "Satin" gene, the guide says the following:

"Satin is a gene found in many animals and proposed to be found in some breeds of horses, most notably the Akhal Teke. Satin animals have mostly hollow hair shafts with a missing medulla (innermost layer of the hair shaft). The hair is instead filled with air pockets. This causes light to refract differently on satin coats then normal coats. Satin hair is also finer and more delicate then normal hair. Satin may be located at the Foxq1 gene (Forkhead box, subclass q, member 1)."

It doesn't even indicate that "Sa" is the symbol used to mark that locus (and honestly I'm just guessing that that's the symbol they're using--it's the symbol we use in rabbits, anyway), or whether satinization is caused by the dominant allele "Sa", or the recessive allele "sa". I know it's recessive in rabbits, but I honestly have no idea about horses.

The same for the dun gene. It doesn't say what symbol is used to mark it's locus (though I'm pretty sure it's dd), or whether dun is dominant or recessive.

Has anyone made a simple dominance guide, at least for the traits that are passed on in a simple dominance fashion?

ObsidianKitsune · Mar 12, 2018 4:47 PM

I know that for the numerous "bay" genes (A+, At, A and a) that it states which is more dominant over the other. Most of the other genes only have a dominant and recessive, so I think that's why it's not viewed as needed in the guide.

A quick way to check what triggers what in a horse is to go to the horse search and play around with it. You can toggle "Must have D" to see horses with dun, or "Must have sa" to see horses with satin, or those hiding it (it's recessive here too).

Ammit · Mar 12, 2018 5:20 PM

In simple genetic inheritance the capitalized letter is always the dominate one.

SandycreekFarm · Mar 12, 2018 5:58 PM

S=no sooty, Ssty=sooty expressed; Ssty is dominant over S; S+ dominant over S. I'm not sure about any difference in dominance between Ssty and S+.

A+ Wild Bay; most dominant allele; A Dominant Agouti, 2nd most dominant allele; At Brown, third most dominant; a, recessive, no Agouti expressed. A+A, A+at, or A+a = a Wild Bay horse; AAt or Aa, a regular Bay horse; AtAt, a lighter brown horse; Ata, a brown horse.

F dominant non-flaxen; f recessive allele; ff homozygous recessive, flaxen expressed on red-based horses.

For Satin, Sa-non-Satin is dominant. Homozygous recessive sasa will be expressed.

Broken/mutated Kit genes are dominant over unmutated genes.

Splash genes: Sp-nonmutated, recessive to Sps (Splash 1) and Sps3, and SpM (Macchiato).

Mutated Splash 2 gene- PAX3^C70Y is dominant over unmutated Pax3+ gene.

Rb rabicano is dominant over rb, non-rabicano.

RoseFlute · Mar 12, 2018 6:56 PM

I think the general rule is that the more common genes are dominant (dun needs D to express) and that sometimes the more fancy ones are recessive. Only sometimes, because KP is recessive but most fantasy genes aren't, because you have to pay money for them and recessive genes are harder to breed for. I'll make a list here:

Satin: recessive. Needs sasa to express.
KP (kit promoter): recessive, but also need two kit genes of any kind to express.
Snowflake: recessive, but needs at least one Appaloosa allele (LLlp) to express.

DP (dense Pheomelanin, makes livers from dark chestnuts): dominant.
All ices: dominant.
All Rainbow Riot (watercolor, plaid, thunderstruck): dominant.
Macchiato: dominant.
Nexus and Axiom: dominant.

I think that's it for the fantasy genes. :)

HeavenlyHooves2 · Mar 12, 2018 11:30 PM

Ok sorry to butt in, but I am thinking of adding Satin to this girl.

Salted Pepper Snowflake
Any opinions on if it's a good idea or a waste of cash.

ObsidianKitsune · Mar 12, 2018 11:33 PM

Always test your horses, no matter how pretty they are. If you have a horse that is papered failed/showable only, they're practically useless unless you keep them around as a show pony.

Also, it tends to be better to add "special" genes onto a stallion, since they can breed 50 times a season (excluding straws), whereas a mare can only breed once a season.

Ragtatter · Mar 13, 2018 6:18 AM

"In simple genetic inheritance the capitalized letter is always the dominate one. "

I don't think you actually read my post, Ammit.

The issue isn't that I don't know that capital letters denote dominant alleles, the problem is that for most genes the guide doesn't actually bother to say what trait is on the dominant allele or what trait is on the recessive one.

If Satin is dominant, then "Sasa" makes a satinized horse.

If Satin is recessive, then "sasa" makes a satinized horse.

But the guide doesn't actually SAY whether a satinized coat is dominant or recessive. It doesn't even manage to say that satin is represented by "Sa/sa" at all.

Actually, for most genes, the guide gives the scientific name of the locus instead of giving the common use symbol (i.e. the guide says STX17, while the actual name the GAME uses is "G/g")

If every gene had the sort of description that MC1R got ("this is what the gene is marked as, this is which trait is dominant" etc.), the guide would be incredibly useful, but almost none of them give this same basic information. The end result is that the genetics guide isn't very useful.

****

To the folks that listed them for me, thank you very much. <3 <br />

Ammit · Mar 13, 2018 6:31 AM

Not sure if it is your intent but your posts come off as very snarky. It is not necessary. :) I know things don't always read as intended in text.

If you have a question about a specific gene people would be happy to answer. I have had more important things to take care of than the genetics guide. It has been very low priority.

Ammit · Mar 13, 2018 6:47 AM

If a group of members would like to work together to create more complete write ups on each gene I would be thrilled and happy to put that info into the guide. :D

HeavenlyHooves2 · Mar 16, 2018 6:59 AM

Ammit if it is me your referring to I apologize. I do not intend to sound snarky, mean, or rude. I sometimes have a hard time getting what I want to say to come out right.

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