As the title says. I have always wondered if the electric blue gene is a man made gene similar to red severums. Are they either an extremely rare trait that occurs in the wild that man has expanded through mass breeding or are they another disgusting man made mutation?
A lot of people, some of them fairly expert, have spent a lot of time trying to get to the bottom of this question, including doing dna analysis-- and there doesn't appear to be a 100% certain answer.
The genetic evidence, at least as late as anything I've found or read, favors EBJD not being a hybrid, but a hybridization event apparently can't be ruled out beyond question according to some familiar with genetics. Or, to put it another way, I've yet to see a report of genetic evidence of any substance for hybridization, only explanations of why it can't be 100% ruled out. If there was a hybridization event, there's no evidence of when or where it occurred. In other words, hybridization can occur naturally in the wild and IF there was a hybridization event, of which there isn't any positive evidence of substance, it may have occurred in a tank somewhere in South America 30 some odd years ago or may have occurred in a stream, lake, pond or drainage ditch somewhere in the field.
The basic story of how they came into the hobby has been reported by various sources, the basic story
here. Example of one of the more sophisticated and technical discussion of the genetics is
here, a molecular biology forum, not a fish forum.
The genetic provenance of the fish is (apparently) not beyond all trace of doubt. So there's some license for personal interpretation. But if you start splitting hairs with
too much bias incited by prejudice against "man made" fish, no matter of what degree, you have to consider the interpretive or potentially arbitrary degree at which you're delineating the term, considering the very act of setting up an artificial environment (fish tank) with an artificially limited population already produces increasingly "man made" fish with each succeeding generation. Even if it's random and without design (you're not line breeding to select for a particular trait), as soon as you pick out the fish to go in your tank or someone else picks them out to ship to you, human intervention has 'selected' the potential breeding individuals to produce future generations of what arguably, however imperceptibly, become man made fish.
In other words, when it comes to EBJD, it's in the eyes of the beholder...