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 house cat and here the Savannah originated.
The first generation savannahs are commonly known as the Filial savannahs. You see that the term F1, F2, F3, F4 and F5 etc are used. The “F” does not state 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 thus covered by a serval. The cat is thus a 1st generation after the Serval.
When we talk about a F2 Savannah, we are talking about a cat whose grandfather is a Serval. The mother cat is himself an F1 savannah and is covered by a Savannah stud (generation from F5, but no matter which generation. For the percentage of Serval blood and the format prefer an F5 than a lower generation stud. But it remains a F2 Savannah even if they are covered by a F7.
If we are talking about a F3 Savannah then we are talking about a cat whose great grandfather is a Serval. The mother is always a F2 Savannah etc. Each Filial (generation) contains 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 already at least 50% Serval blood is present and in the domesticated cat this percentage is o%.
With a cross between a serval and a higher generation Savannah, you can come to an F1 with 75% Serval blood. These Savannah cats are therefore bigger and come closer to the Serval. Also in terms of character and appearance, they appear more like their ancestor. For a 75% Savannah percentage, however, they are also more difficult to keep in their homes, because the behavior of the Serval has also been bred for 75% in the cat.