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Showing results for tags 'pure.'.
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This is another option for a term instead of using pure.
Disciple posted a topic in General Questions/Discussions
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. -
We are having a debate about the term Pure. Please have your say.
Disciple posted a topic in General Questions/Discussions
Ok people time to make history we will start with a simple one for this we just need a yes or no answer we will define the term pure as it will relate to shrimp this is only single gene line shrimp no hybrids ie tibee, pinto, misch etc. Going forward in our hobby pure in reference to shrimp will mean the following any shrimp that produces and has produce all offspring of the same genetic make up as the parents for 3 or more generations shall be deemed pure. These are some interesting responses that we have had. 1. Yes! But I'm not okay with just 3 generations to call it pure. As I told earlier in another discussion, I've been getting only crs offspring in my crs only tank for the past 2 years until now(2 golden bees after more than 10+ generations approx, meantime no new shrimps were added in the past 1.5 years) 2. Perhaps the term "true-breeding" (or pure-breeding) is more useful than pure, most if not all these things are hybrids after all. There are no wild species that correspond to a Taiwan/Shadow bee, for example. The true breeding stability comes from dilligent selection and line breeding for a given trait until no other traits occur. That's the hard part of the work and down to the quality of the breeder. 3. Well pure means pure, not 80<90 %.