spawning levels or ID's??

[Tedstank]

Heres an uneducated question and I am unable to find an answer.

When identifying spawning levels is it: F0 are wild caught, F1 are F0's spawn, F2 are the spawn of F1, and F3 are the spawn of F2???? etc,etc.

How far does this continue?? to F-what?

Then if an F2 where to back breed with the F0...does it start over? when you go back to the F0 wild caught?

Sorry but I cannot find this anywhere as I dont really know what it means, and I have never really thought much about it.

 

[ed seeley]

That's how they're used in the hobby but they aren't really the correct uses of the terms.

F stands for Filial which basically means offspring and refers to the offspring from a pairing of two different parents to create and F1 hybrid.

Someone a long time ago (probably while at Uni - not too long ago really lol!) told me that we should be using W1, W2 etc. for our fish that are 1, 2, 3 etc. from the wild generation but I don't imagine we will change the trend of the entire hobby!

I think you're best referring to Wild fish as Wild or WC standing for Wild Caught rather than call them F0 as that has even less standing IMO.

 

[Tedstank]

Thanks you very much!!!

So... the F connotations are for our information on how far down the line genetically we are from the original unrelated parent stock.

In the case of Wild stock we dont know the true standing genetically (properly assuming more genetic diversity) so as a starting point they are better labeled WC, and F0 would be more fitting to identify tank raised unrelated stock.

 

[ed seeley]

That's bascially it. Although the fact that your wild parents aren't genetically unrelated is the crux of the reason why we shouldn't use the terms F1, F2 etc!

I use WC and then F1 etc.

I wouldn't use the term F0 for anything; it's an oxymoron as the F mean offspring so how can you have 'Offspring 0'!!! It would be far better in that case of crossing to unrelated fish (e.g. an outcross between two linebred lines) to refer to the parent strains, e.g. Wild male x red female.

I'm currently waiting for a Red male Pelvicachromis pulcher to breed with a female Albino P.pulcher so the terminology I'd use for this cross is the parent generation is Red x Albino. Their offspring will be F1 and then the results I get will determine whether I breed F1 to F1 or whether I backcross to try and improve the albino colouration.

 

[Tedstank]

I got it!!!!.. Thank you!! making a bit more sense to me now.

 

[apistodave]

Ja

I am with Ed--F0 is just stupid--fish are either wild caught or tank raised, although I have been keeping track of my trifasiata that I got in 97--I am now on F1,157