electric blue jack demsey is a hybrid?????

[bad fish]

Is the E B jack demsey a hybrid

 

[X24]

no, if i remember correctly just some jd's carry a gene that makes their fry ebjd's.

 

[benzjamin13]

I pretty sure they're not hybrids. Just bred to concentrate a strain.

 

[Cross127]

No definately not a hybrid its just a recessive showing up because there is no dominant gene (regular JD) that is present. Just so happens that this recessive gene is blue.

 

[ewurm]

No definately not a hybrid its just a recessive showing up because there is no dominant gene (regular JD) that is present. Just so happens that this recessive gene is blue.

I believe this is why they are prone to premature death. Too many recessive genes = bad for survival.

 

[koliveira]

They are hybrids guys. Here is some info from original suppplier of the strain and a link below.

File:
In the deposit carrying reproducers of the blue gene are used that are different little or nothing from a Jack common Dempsey. But, to be sincere with other fans or professionals who try the reproduction, it is necessary to say that before obtaining the Dempsey Blue, it had you cross spontaneous between Nandopsis (x Cichlasoma) octofasciatus and other cíclidos varieties of Central American, such as Parapetenia (x Heros) (xCichlasoma) managuense(Günter 1869, photo of above) and Heros (xCichlasoma) synspilum (Hubbs 1935, photo of down), that infertile young produced if it crosses them to each other. To see note on the matter



Of the obtained units a number with all the characteristics of N. existed octofasciatum, some with indefinite characteristics and others with characteristics of Heros (xCichlasoma) managuense. Finally those discarded all that did not have characteristics of Jack Dempsey, reason why we suppose that the appearance of the blue gene must come from some of the units crossed managuense H. but that they have all the appearance of N. octofasciatum.

Record:
In the breeding ground there are used carrying breeding animals of the blue gene that differentiate little or nothing of a common Jack Dempsey. But, to be sincere with other fans or professionals who try the reproduction, it is necessary to say that, before obtaining Dempsey Blue, there was a spontaneous cross between Nandopsis (x Cichlasoma) octofasciatus and other varieties of Central American, such cíclidos as Parapetenia (x Heros) (xCichlasoma) managuense (Günter 1869, photo of above) and Heros (xCichlasoma) synspilum (Hubbs 1935, photo of below), that unfertile babies produced if one crosses them between yes.

Of the obtained copies a number existed with all the features of N. octofasciatum, some with indefinite features and others with features of Heros (xCichlasoma) managuense. Finally there discarded all those that did not have features of Jack Dempsey, for what we suppose that the appearance of the blue gene must come from some of the copies crossed with H. managuense but that they have the whole appearance of N. octofasciatum

http://www.elacuarista.com/secciones/blue_dempsey2.htm

 

[dovii88]

yes they are hybrids

 

[Grummie2]

No, they're not hybrids, it's a recessive gene. The DNA has been checked and it's no different to a normal JD, also, people who have bred this fish have found normal recessive gene behaviour in the % of the offspring produce (see posts from breeders on Cichlid Forum). The fry are also uniform in their appearance, something that is not consistant with hybrid fry. If there was any Jag genes in there you'd get throwbacks (size, pattern, aggression, jaw structure etc..) and there's absolutely none!

 

[Piranhanut]

Not a Hybrid, just weak mutant offspring. Just as when you see an albino fish. Not likey to adapt,survive in the wild.

 

[rmcder]

Hybrids would not display classic Mendeleevean reproduction patterns, as ejds have been demonstrated to do. It's pretty clearly a recessive gene issue. And, as previosly stated, Rapps had the DNA verified. I don't know what the deal is with that site, but the science doesn't bear out the claims.