O.K... I am not a great knowledge base on genes and genetics here but I will try to explain from what I understand. The brindle coloration comes from a specific gene it is NOT a result of a combination of genes, ie. a fawn dog crossed with a black dog. I am under the understanding that you cannot get a brindle dog from two fawn dogs even if both had brindle parents but you can (in some circumstances) get a brindle dog when crossing a black dog with any other color as long as one carries the brindle gene. ALL versions of brindle (reverse, dark, araca etc.) are brindle and brindle is a base coat of fawn with black stripes. You will get brindles though from crossing a brindle dog with either another brindle dog or any other color dog. The terms reverse, heavy or dark brindle are just terms to describe a dog that has heavy black stripes.. some dogs have so many stripes that it appears as if they are black with fawn stripes but it is actually a base of fawn with heavy black stripes that are so much that they actually cover most of the dog. an araca (a term used by brazilians) is just a brindle dog with very few stripes and in some cases the stripes are so vague that it looks like it is more of a powdering (think of when you use a spray can quickly and it does not cover evenly). In CAFIB the brindle must be clearly defined and cannot form blotches/stains of black, you should be able to see an individual stripe. Also if the dog has the brindling on its back it should from "V" formations on its back going towards the base of the tail. It has been my experience that at times when brindles get bred to brindles an undesired amount of brindle amount shows up (too much). CAFIB scrutinizes brindle dogs very carefully as many show signs of mix breeding especially those with the reverse brindling (usually seen with neo crosses) and if they are disqualified they are disqualified because of the multiple traits/characteristics found on that dog that are not uniform with the Fila Brasileiro breed. I hope this helps somewhat.
I've never heard of Araca...will definitely have to check that out.
