Really want to continually inbreed closely related animals...this is the primary reason to assign a connotation system...to keep track of the project in a simple,linear fashion,and make the proper decisions about outcrossing. long before the filial system was misused by those that didn't understand its purpose,it was primarily used in conservation programs to keep specific races,locality variants,or distinct subspecies from being overly,and/or directly inbred,and to track any deleterious effects that might hinder long term survival,(the gene pool of the Florida panther was deemed to be so decimated at one point,that in order to "save" them,animals were introduced from the Texas variant,which actually created an intergrade,but served to strengthen the existing gene pool.)...also,if an animal showed some sort of mutative variation,the filial system was incorporated in a captive breeding program until such time as the inheritable nature of the mutation,if any,was determined,or identified. once the trait in question was accurately identified,(usually within the F3 generation,for most simple,or presumed "single gene set" mutants.)the use of the system became,for the most part,redundant,and unneccessary,and was usually dropped altogether.
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