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Question regaurding F1's, F2's etc.....

ajfreptiles Sep 13, 2005 10:36 AM

I do not fully understand the terminology....I have a Salmon that I guess would be an F1 but was from a possible super to super breeding...but proved out regular Salmon, is that correct? Also I have a Pastel, that is from a Pastel breeding, so she would be an F1 as well right? Now those two bred and produced F2 babies? Please help clarify this for me. Thanks Andy Federico

Replies (8)

srsnakes Sep 13, 2005 11:45 AM

Andy-
You are on the right track. Hypos are refered to by generations, so like F1 generation is the offspring of a hypo and a normal mating, now if you breed two f1's together then you will have F2's and so on down the line. I didnt know that pastel lines when by generations but i wouldnt imagine that crossing a pastel and a hypo would give you an F1 count. I think the F1, F2 only refers to hypos/salmons. Hope that helps you out.

Sincerely,
Rose Hipskind
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www.srsnakes.com

Rainshadow Sep 13, 2005 12:12 PM

Filial connotations can be applied to ANY set of animals,or organisms,(even humans,and it was once very important in regards to ancient royalty.) Quite simply it is a linear tracking system. A way to imply significance,or show the relationship of directly decended offspring to an original pairing. To use the system with hypos that are not directly related is redundant at this point,it is much more important to understand the true genetic status of the parents,and accurately represent the implied potential genetic status of the subsequent offspring using our knowledge of how the trait is transmitted,and expressed.(using simple Mendellian genetic theory.) Filial tracking is often used in rare,or endangered,or locality specific animals as a way to convey a degree of purity of that particular species/subspecies/race,or locality.
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ajfreptiles Sep 13, 2005 12:22 PM

That helps. Andy

johnmartino Sep 13, 2005 04:09 PM

A true F2 is when sibling F1's are bred. A true F3 is when sibling F2's are bred. If you breed two different F1's together you do not get true F2's. Hope that helps.

rainbowsrus Sep 13, 2005 05:39 PM

the Fx terminology refers to the number of generations from an original pairing. F1 being offspring, F2 being from a pairing of related F1's (that came from the same two parents, not necessarily same litter ie could be a '99 paired with a '00), F3's from related F2's etc. etc. gets real muddy if you mix say F1's with F2's...what would that be? F1.5, F2.5 LOL
Any time you pair up with unrelated, the offspring reset back to F1's
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Thanks,

Dave "Rainbows-R-Us"

0.1 Wife
0.2 kids
4.12.100 Brazilian Rainbow Boa
1.1 Ball python
0.1 BCI "Elvira" normal from 1989
1.0 BCI albino / het-anery
0.1 BCI Hypo / het-albino
0.1 BCI Anery / het-albino
0.1 BCI Hypo (possible super)
1.0 BCI albino het stripe
1.0 BCI salmon hypo
0.1 BCI ghost

lots.lots.lots feeder mice and rats

ajfreptiles Sep 13, 2005 09:21 PM

that cleared up all my questions. Thanks Andy

EricIvins Sep 13, 2005 10:15 PM

One thing to keep in mind is the fact that yes, the fillial methodology was used to track generations from a original pairing. But nowadays I think the definitions is a little broader. It basically means any F1 pairing ( whether related or not ) =F2, F2xF2=F3 and so on. If you have a F3xF2, the offspring will only be F1's, because you are creating a different lineage ( according to the theory ). Technically these would be F1 Argentines, because they were from a mixed fillial breeding. Also the resulting litter between two wildcaught individuals would equal F1 offspring

chicagopsych Sep 13, 2005 10:49 PM

"It basically means any F1 pairing ( whether related or not ) =F2, F2xF2=F3 and so on."

Actually there is no such thing as an unrelated F1 pairing. Any non-sibling pairing would be the P (parent) generation. Breeding back the offspring to one another would result in the F1 generation.

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