Since I last posted, I have learned that two techichi type Chihuahua dogs that I know of, have been tested genetically. So far, they both do have Chihuahua genes. But, these dogs are not the descendents of the AKC Chihuahuas, they are similar to the parental stock.
I hope more people do a genetic test on their techichi dogs- It was around $60, the last time I checked. This website could become a place where we gather that information together, and maybe share the whole genomes, somehow.
The parental stocks of the AKC Chihuahuas were landrace dogs. This meant that outside genes could and did come in, so I suspect the techichi type genomes have a lot of diversity – yet the techichi, deer chi population maintains its original archetype. It is theroretically possible that combinations of other kinds of dogs could give a classic Chihuahua look. Such as the Min Pin. There are lines and mixes of Minpins that look like the deer Chihuahuas, especially when they are black and tan rather than red.
Many native nations had small dogs, the mutation for small dogs happened before the crossing of the Bering Strait, so the Igf1 gene certainly came to the Americas. Even if smallest dogs did not, some small dogs did.
All of the depictions of small dogs in old North American art have the same basic shape, prick ears and a relaxed tail. Coat types and colors varied, but the dog type stayed constant to the original dog shape, that of a wolf. Dropped ears and other features that deviate from the wolf archetype come from inbreeding closed populations. There were virtually no closed populations in most of the Americas before the development of dog breeds in Europe in the 19th Century madness, infected America.
Therefore, I think that any Euro genes that get into the native techichi type population are mostly recessive, so they disappear in the first generation and will only be seen again if two matching recessives meet, which is unlikely in an open population. Therefore I think anyone who has a small dog with prick ears and short hair has a techichi type for breeding purposes, especially if bred to another dog with the deer chi look.
What I am saying is that, in my humble opinion, genes are genes, wherever they come from, and if a small, short haired longish legged dog with prick ears and a relaxed tail wants to be a techichi type, they already are. Above all, the techichi is a type, a phenotype, if you will. As long as the phenotype remains constant, it does not matter where the genes that give the type come from, one bit.
Having said that, I bet the vast majority of genetically tested big Chihuahuas, deer Chihuahuas, or techichi types will have some genes in common with the AKC Chihuahua, which is an inbred (read small number of diverse genes) descendants of the original native dogs. The true techichi type spectrum of genes will prove to be MUCH greater than the AKC Chihuahua has.
In the world of landrace dogs, forget the inbreeding, forget purity of blood concept- which comes straight out of eugenics, forget even the genetics, go for the phenotype. That is how the old dogs looked, that is how the dogs today look. If they have the phenotype of a techichi type, they are a techichi type (no capital letters) and any breeding with another techichi type will give nothing but techichi types, unless, very rarely, two recessives meet up that change the phenotype- ie short legs.
Let us continue to collect techichi types from shelters and pounds, none of whom will able to breed. Maybe someday it will be respectable to openly breed techichi types, but for now there are plenty of them available for adoption.