Bgjd + Bgjd = 25% Ebjd?

[leecasey]

Hi, if you breed 2 blue gene JDs do you get (in theory) 25% Electric Blue JDs?

 

[minnnt]

No idea mate, James would know though. lol. (verminator)

 

[StandbySetting]

It depends on the genome of the two parents. If in this instance we give the gene that expresses the blue colour a 'b' and the standard variation a 'B' then we can calculate the probability, I have assumed that the standard colouration is the dominant gene, I'm not sure of this but for explanatory purposes we will presume so.

If the parent fish posses two copies of the recessive 'b' gene (which it must have in order to express this phenotype presuming that the blue colouration is recessive), then the probability of the offspring being blue JD's are 100%
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If the blue gene is dominant (Capital B), then the odds of getting a blue JD depends on the genome of the parents, there are 3 possible combinations:

BB would give blue JD's
Bb would give blue JD's
bb would give standard JD's

so if a BB bred with a BB the probability of blue JD's is 100% if the blue gene is dominant
If a BB bred with a Bb the probability of blue JD's is 100% (50% BB, 50% Bb)
If a Bb bred with a Bb the probability of blue JD's is 75% (25% BB, 50% Bb, 25%bb (standard colour))

 

[leecasey]

Thank you for taking the time to reply with such detail! this is what I thought. Very useful thanks again!

 

[Verminator89]

EBJD's are open for much debate as to whether they are naturally occuring or not. Breeding the EB gene gets even more complicated, but as a general rule of thumb two EBJD's breeding will not give EB fry. Breeding an EB Jack with a normal Jack will yield EB fry. However, the ratio is likely to be nearer to 25% EB, 25% normal and 50% somewhere inbetween.

Thats the simple answer. People have been trying to breed them, with varying amounts of success. I myself am one of the unsuccessfull ones so far. However, people have done it. Its one reason why there are so many variations of the EB gene in fish we see for sale. So in short, no. Two EBJD's will not produce 25% blue gene fish. The blue gene itself isnt the dominant gene in fish, and without going into confusing genetics it has to be crossed with thatof a regular jack for it to be passed on. Why this is the case i don't know, one of the things i myself don't understand fully, least not enough to lecturer it to others. But the general idea of breeding the EB gene comes in those percentages from a EBJD and a normal JD.

The occurence of the blue gene i believe to be naturally occurring, as all Jacks have it to some degree. I believe there are pure EBJD's out there in the wild, in the same sense they are there as albino form also. With selective breeding over the years, this is how i feel the EBJD that we all know so well hase come about. Proof though, is yet to be confirmed.

Hope this helps.
James

 

[minnnt]

EBJD's are open for much debate as to whether they are naturally occuring or not. Breeding the EB gene gets even more complicated, but as a general rule of thumb two EBJD's breeding will not give EB fry. Breeding an EB Jack with a normal Jack will yield EB fry. However, the ratio is likely to be nearer to 25% EB, 25% normal and 50% somewhere inbetween.

Thats the simple answer. People have been trying to breed them, with varying amounts of success. I myself am one of the unsuccessfull ones so far. However, people have done it. Its one reason why there are so many variations of the EB gene in fish we see for sale. So in short, no. Two EBJD's will not produce 25% blue gene fish. The blue gene itself isnt the dominant gene in fish, and without going into confusing genetics it has to be crossed with thatof a regular jack for it to be passed on. Why this is the case i don't know, one of the things i myself don't understand fully, least not enough to lecturer it to others. But the general idea of breeding the EB gene comes in those percentages from a EBJD and a normal JD.

The occurence of the blue gene i believe to be naturally occurring, as all Jacks have it to some degree. I believe there are pure EBJD's out there in the wild, in the same sense they are there as albino form also. With selective breeding over the years, this is how i feel the EBJD that we all know so well hase come about. Proof though, is yet to be confirmed.

Hope this helps.
James

Told you so... lol.

 

[leecasey]

lol

Thanks for the information James. My hunt for an EBJD shall continue!

 

[Verminator89]

The hunt and price is well worth it if you get one from a good gene pool. Some will grow up looking ugly as sin unfortunately, whereas other grow up beautifully.

Good luck with your search, and get a journal going on here when/if you get one!

 

[steve the fish]

well that was interesting to read being a new keeper of ebjd ,s .i have to large males an ugly 6 inch and a very strong 7 inch who resembels a normal ebjd with great colour at the moment there doing a great job faning eggs with his normal jd female so i am happy as larry now to no i could have wigglers in the morning that could be ebjd,s .some quote you need a blue gene from a different pair breed back to my male so i,ve been hunting a blue gene female . well if this is the way forward 25 percent sounds ok if fish are healthier than going for 50 percent. ebjd + bgjd to get the half eb could please advise as new to ebjd thanks steve

 

[leecasey]

well that was interesting to read being a new keeper of ebjd ,s .i have to large males an ugly 6 inch and a very strong 7 inch who resembels a normal ebjd with great colour at the moment there doing a great job faning eggs with his normal jd female so i am happy as larry now to no i could have wigglers in the morning that could be ebjd,s .some quote you need a blue gene from a different pair breed back to my male so i,ve been hunting a blue gene female . well if this is the way forward 25 percent sounds ok if fish are healthier than going for 50 percent. ebjd + bgjd to get the half eb could please advise as new to ebjd thanks steve

Will be interesting to see! Keep us updated, maybe start a thread in the journal so we can track the progress of them. Would love to see some pics too! Good luck

 

[steve the fish]

well that was interesting to read being a new keeper of ebjd ,s .i have to large males an ugly 6 inch and a very strong 7 inch who resembels a normal ebjd with great colour at the moment there doing a great job faning eggs with his normal jd female so i am happy as larry now to no i could have wigglers in the morning that could be ebjd,s .some quote you need a blue gene from a different pair breed back to my male so i,ve been hunting a blue gene female . well if this is the way forward 25 percent sounds ok if fish are healthier than going for 50 percent. ebjd + bgjd to get the half eb could please advise as new to ebjd thanks steve

Will be interesting to see! Keep us updated, maybe start a thread in the journal so we can track the progress of them. Would love to see some pics too! Good luck

well thats my mission now to get some stuff uploaded pictures thanks steve

 

[steve the fish]

well that was interesting to read being a new keeper of ebjd ,s .i have to large males an ugly 6 inch and a very strong 7 inch who resembels a normal ebjd with great colour at the moment there doing a great job faning eggs with his normal jd female so i am happy as larry now to no i could have wigglers in the morning that could be ebjd,s .some quote you need a blue gene from a different pair breed back to my male so i,ve been hunting a blue gene female . well if this is the way forward 25 percent sounds ok if fish are healthier than going for 50 percent. ebjd + bgjd to get the half eb could please advise as new to ebjd thanks steve

Will be interesting to see! Keep us updated, maybe start a thread in the journal so we can track the progress of them. Would love to see some pics too! Good luck

well thats my mission now to get some stuff uploaded pictures thanks steve