about 2 years ago and my understanding of the answers and explanations were:

Filial generations and connotations are ALL related to inbreeding.
You start w/ two animals, the "P" generation.
You breed them together and get "F1" progeny.
If you breed the siblings from the "F1" generation, you will get "F2" progeny.
If you breed the siblings from the "F2" generation, you will get "F3" progeny.

And so on.

It was also my understanding that if you take an "F1" animal and breed it to an "F3" animal, those two animals will be considered the "P" generation and the cycle starts all over again. BUT!!! My quick 5 minute research into filial generations also told me that the "P" generations are ASSUMED to be from unrelated stock, so I think that throws a minor wrench into the process and I'm not sure where we take it from there.

I was also under the impression that if you take an "F3" animal (for instance, or any other generation, say, "F100" and breed it to anything other than its sibling, you now have a new filial generation ===> "F1", because the parents are unrelated and are considered to be the "P" generation (again, because filial generations are in relation to inbreeding).

Check this website for more info! http://www.biology-online.org/dictionary/Filial_generation

So that's my understanding. Anyone else have a different interpretation?
jb
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Jonathan Brady
"Sarcasm is angers ugly cousin" -Dr. Buddy Rydell (Jack Nicholson) in "Anger Management".

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