DEBATE: Lethal genes on Equiverse

I support that idea.
It's not complicated to avoid loosing foals when breeding, just don't breed two Overo or White horses together.

To be honest, I was surprised that lethal genes weren't mentioned in game when I joined it o.O .
EDIT:
When breeding W+ x W+ (and also Oo x Oo) you have 25% chance for lethal (WW/OO), 50% for White/Overo (W+/Oo) and 25% for recessive (++/oo).
When breeding W+ x ++ (or Oo x oo) you get 50% to get W+/Oo horse, 50% for recessive (++/oo) and you won't for sure get lethal here.

Last edited on 2017-05-04 at 02:06:48 by Radosny Rabarbar

Lol still going to cull if that happens XD besides those are the only ones I have currently,if I get more stores and the future foals of all of them  (or grand foals) down the line could end up having either of those things because I don't know how to breed away from them as genetics confuse me and I'm also not the best at remembering these types of things. 

Besides when people tell me don't or can't, it's in my nature  (as long as it's not harmful to me anyways) to do just that. Just ask the guy who said I couldn't make it up one mountain where I went and did a higher one to show him or the guy who thought I shouldn't go to the bottom of the grand canyon and I did it. Watching him eat his words was the best thing ever XD Now I have strayed a bit from what this topic was about so, still against it because brain can't handle all that, let alone regular genetics, and because for me I like not having to think about things :) and yep, still going to cull the breeds, which especially for the Shetlands will be great for some breeders I'm sure:)

Last edited on 2017-05-04 at 05:59:25 by Wonder Wiki

It is if I was breeding strictly for color. 90% of my horses are bred with conformation in mind, so it may happen that I pair 2 white horses together for conformation. But still I used color randomizers on 3 herds of Lippys to get rid of grey, so yeah if it's added more money for the site lol 

I wouldnt mind that if it had the warning for sure : D

I think that would defiently be better to have a warning.

I like having the warning, especially for those who may be unfamiliar with the genes.

Definitely would like the warning to be displayed for those players who struggle with understanding genetics. 

I would support it more with the warning :D

I voted no. I prefer fun games over 'realistic' ones.

Alternately, if one fatal condition is added, then all potentially fatal conditions should be added. 

I'm perfectly fine with the notion.

However, I will state that not all white genes are lethal. There's 20+ different genes all lumped under the category of "white". Aptly named W1-W20. Several of these can exist in homozygous forms, notably W20.

See: http://www.vgl.ucdavis.edu/services/horse/dominantwhite.php

I am all for this.

Of course I'm a realism and genetics junkie.

And as Kuk said, not all W mutations are lethal. I believe the only one that is CONFIRMED homozygous lethal is the one found in Camarillo White Horses, which aren't even in the game anyway.

@Abbey
With the warning, how would that work if the parents aren't gene tested? For example one parent is white with overo underneath (so there's no way to tell it's got overo) and the other is overo, which is known either with or without a test. Both parents have overo, but there's no way to tell for one of them until the warning comes up.
In general I support the idea of a warning though, just wondering how things will work.

@Kuk and vos
Although there are lots of different dominant white genes, only a few of these produce solid white horses, and most of those have either been proven to be homozygous lethal, or at least have strong evidence indicating they are, so it still makes sense to make the game's white gene homozygous lethal. Most of the dominant white genes produce white spotting, not solid white, so if those ones aren't lethal it's irrelevant.

Most have them have /not/ been proved to be homozygous lethal. The vast bulk of them are only hypothesized to be homozygous lethal. Currently, there isn't enough DNA'd horses to be able to make an accurate guess.

If you recall, people thought that roan was homozygous lethal for quite some time.

Most aren't homozygous lethal, actually.

And many of them simply aren't seen homozygous because they are specific to families, stemming from a singular horse. In order for a horse to be homozgyous for the vast majority of any of the white mutations would be if they were either closely linebred or directly inbred, which most people don't actually do. The breed with the most W mutations discovered right now is the Thoroughbred, and racing TB breeders generally do not want color so they tend not to really breed those that have a lot of white.

^ Yup. People thought roan was homozygous lethal for YEARS. Since roan is on KIT and KIT is extremely unstable, it's highly likely that there are multiple mutations of roan as well. There is a probable homozygous lethal version of roan in one of the European draft breeds, I believe.

Side note, it's actually been noticed by geneticists that many tested nearly or all-white horses with their family's mutation also have W20, which is a white booster. In horses from those families that have their family-specific mutation, but not W20, have spotting pattern but are not all white. And a couple years ago, equine geneticists renamed "dominant white" to "white spotting" BECAUSE the mutations don't result in a dominantly-white pattern without additional mutations boosting them.

Last edited on 2017-05-05 at 13:40:43 by vōs♚