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Maybe someone can lend a hatchet to my intellectual thicket over here. I am more of a python girl, and I was wondering if someone could tell me what it means to be called F2 (or F3 or F4)? I mean, I figure it's the same thing with designer cats -- the number meaning so many decedents past the desired animal. But can someone tell me what the relevance would be in Redtail Boas? To be more specific, I'm personally talking about a 2007 pair of F2 Anerys. I'm just trying to educate myself and be more knowledgeable on the subject... thanks in advance for the help!!
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Cheers!
• Chelsea Lynn Gardiner
(and Frank M. Wood)

My understanding of it goes like this:
Unrelated parents are noted as the "P" generation.
PxP = F1
F1xF1 = F2

In the F1xF1 case, the animals must be siblings to achieve F2 babies.

If you have an F1 from line "A", and F1 from line "B", they are unrelated and therefore are considered the "P" generation.

I posed a question a few years ago and I don't believe I received an answer to it, but my question was if you have an F2 animal and an F5 animal from the same line, what are the babies denoted from that pairing? Are they F3? F6? or F1? I could rationalize any of those answers but I don't know which is correct. Would it matter if the F5 animal is a direct or indirect descendant of the F2 animal?

Anyone...???

In your case, if your F2 animals are siblings produced from siblings, then your babies will be F3. If their "grandparents" were unrelated, and therefore your F2 animals are unrelated to each other, you have "P" generation animals and your babies will be F1's. If there is any relation going back a few generations, then I have no clue! lol

I hope that was helpful.
jb
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Jonathan Brady
*You have the right to remain silent. Anything you say will be misquoted, then used against you.*

Agreed on the explanation!!

One point I would add is "siblings" don't necessarily have to come from the same litter if the same pairing is done in multiple years all those offspring are "Fx siblings".
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Thanks,

Dave Colling

www.rainbows-r-us-reptiles.com

0.1 Wife (WC and still very fiesty)
0.2 kids (CBB, a big part of our selective breeding program)

LOL, to many snakes to list, last count:
26.49 BRB
20.21 BCI
And those are only the breeders

lots.lots.lots feeder mice and rats

I posed a question a few years ago and I don't believe I received an answer to it, but my question was if you have an F2 animal and an F5 animal from the same line, what are the babies denoted from that pairing? Are they F3? F6? or F1?

I'd just call them line bred.

Anything past F2 isn't very useful as a designation.

F numbers are also sometimes used for the number of generations out of the wild.

Paul Hollander

..
np
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Snake room janitor

This is the same asnswer that JB gave basically.

Here is another clear definition

All I know for sure is this
Filial generation :

The offspring of a genetically specified mating: first filial generation (symbol F1), the offspring of parents of contrasting genotypes; second filial generation (F2), the offspring of two F1 individuals; third filial generation (F3), fourth filial generation (F4), etc., the offspring in succeeding generations of continued inbreeding of F1 descendents.

F2 generation :
The second filial generation, produced by selfing or intercrossing the F1 gen

P-generation
Definition

(genetics) The first set of parents crossed in which their genotype is the basis for predicting the genotype of their offspring, which in turn, may be crossed (filial generation).

Supplement :

The "p" stands for parental. Parental generation is the first generation involving two individuals that are mated to foresee or analyze the genotypes of their offspring.

To simplify The "F" generation always refers to inbreeding (same thing as Line breeding)

JB I don't know the answer to your question,LOL

>>an F2 animal and an F5 animal from the same line, what are the babies denoted from that pairing?

My guess would be the babies will be F6. But its probably an incorrect guess.

. . . . Lar M

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Boas By Klevitz
Boas By Klevitz