The Foundation of the Savannah cat is the Serval.
The Serval is the ancestor of the Savannah cat. The Serval is crossed with an ordinary domestic cat and from this the Savannah originated.
The first generation Savannahs are commonly known as the Filial Savannahs. You can see that the terms F1, F2, F3, F4 and F5 etc. are used. The “F” does not stand, as many people think, for Foundation (Foundation) but for Filial (Generation). The “F” stands for generation of . F1 ( Filial 1) means 1 generation of something removed , F2 means 2 generations of something removed , F3 generation means 3 generations of something removed, etc. .
In the case of the Savannah breed, the term is used to show generations of the Savannah cat that it is removed from the Serval (the Foundation cat) . When we talk about F1 we are talking about a Savannah whose father is a Serval. The mother cat (no matter which generation it is) is therefore mated to a Serval. The cat is a 1st generation after the Serval.
When we talk about a F2 Savannah we are talking about a cat of which the grandfather is a Serval. The mother cat is a F1 Savannah herself and has been mated to a Savannah male (generation from F5, but no matter which generation. For the percentage of Serval blood and size we prefer an F5 rather than a lower generation male. But it remains an F2 Savannah even if she is mated to an F7.
When we are talking about an F3 Savannah we are talking about a cat of which the great-grandfather is a Serval. The mother is then always an F2 Savannah etc.. In each branch (generation) there is a certain percentage of Serval blood and a percentage of domesticated cat.
A Serval with an F1 Savannah gives a higher percentage of wild blood than a Serval with another domesticated cat. This is of course quite simple to explain, because in an F1 Savannah at least 50% Serval blood is already present and in the domesticated cat this percentage is o%.
With a cross between a Serval and a higher generation Savannah you can achieve an F1 with 75% Serval blood. These Savannah cats are bigger and closer to the Serval. Also in character and appearance they will look more like their ancestor. For a 75% percentage of Savannah, however, they are also more difficult to keep in the house, because the behavior of the Serval is also 75% bred back into the cat.