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  1. We seem to be having trouble getting past defining or even using pure. The suggestion has been made to use a generational count the same as we use for mischling ie F1 equals first generation you have bred or can confirm true crossing of both parents from the same genetic line and then work up from there. F1 is unstable by F4 should be mostly stable with maybe the odd unusual outcome less than 1% and F5-10 totally true breeding all offspring are the same genetic variant as the parents. so lets see what everyone thinks of this direction give a yes or no response. Below is the interesting responses. 1. Sorry, but does that mean juvies from a BB line that breeds 100% true and juvies from TBMM x TBMM would both be called F1 BB? If so, No. I don't think thats going to help anyone, especially beginners. Sorry if I have interpreted your definition incorrectly. 2. What if we categorise pure into 2 categories, for those that breed 99% true for the past 2 generations at least, call it Pure. And those that produce high % offspring of one variant (such as: MKK x MKK = 70% true MKK, rest tb,pinto,etc...), we call it line breed (selectively), which means you are selectively breeding one variant to increase % offspring of that variant. And it is necessary to included what are the offsprings from the batch, F number is recommended to included if the breeder is confident with their track record. 3. the word pure needs to be dropped, as no one can guarantee 100% that they will never produce anything other than the shrimp that looks like the parents and grandparents. I like the notion of F numbers however Mischling origin stock should be clearly labeled versus Cleanly bred stock(does not have Mischling decendants) that are currently breeding true.
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