JD/EBJD/BGJD/GJD OFFICIAL CROSS BREEDING THREAD!

[Jakob]

Lets make this a thread for those who dont know much about crossing of those 3 morphs and the real JD.
I was thinking if anybody could make a punnett square, not the simple one, but the dihybrid cross one.
See here:
http://en.wikipedia.org/wiki/Punnet_square

I would make a square myself if i knew more about the jd's.

And as a start:
JD=Jack Dempsey
EBJD=Electric Blue Jack Dempsey
BGJD=Blue Gene Jack Dempsey
GJD=Gold Jack Dempsey

 

[Toby_H]

'Het' is short for heterogeneous... an animal that is Het for a trait, does not display that trait itself, but has the genetic potenital to have offspring that displays that trait...

Thus "Blue Gene Dempseys" are actually "Het for Blue"...

"Blue Gene" is a term created by hobbyists that is not consistent with the science of breeding. If we use terms that are consistent with the science of breeding we will have a much easier time researching the topic. It will also allow us to discuss breeding with breeders of other types of animals.

Thus I highly promote the term "Het for Blue" in place of "Blue Gene"...


Homogeneous is a term to describe an animal that displays a specific trait. But if you call my Blue Dempseys homos I'll be quite upset

 

[Aquanero]

if you call my Blue Dempseys homos I'll be quite upset

That would make a great Sig!!!!!!!!

 

[auratum]

This all assumes that both Gold and EB traits can be inherited and expressed independently. This is yet to be proven with adult fish, but there is a guy selling small ones - need to see what they look like as adults.

Punnet Square like this?

This would be the Gold x EB base cross:

This would be to 2nd generation cross of siblings from the first cross:

 

[Jakob]

Thanks a lot nutcase and auratum.

 

[zerojquan85]

Originally Posted by nc_nutcase
if you call my Blue Dempseys homos I'll be quite upset

that is so going into my sig!

 

[DWass]

What would happen if you crossed a golden/blue back to any of them?

 

[japes]

Is there any conclusive proof yet that EBJD's aren't at least partial hybrids?

 

[Sarah88]

Is there any conclusive proof yet that EBJD's aren't at least partial hybrids?

wasnt genetic testing done that proved it wasnt?

 

[Toby_H]

When we start breaking down these percentages... we should keep in mind this does not mean that (for example) Blue x Het for Blue results in 50% Blue... it means in Blue x Het for Blue offspring there is a 50% chance in being Blue applied to each offspring.

When dealing with creatures (such as Dempseys) that have many many offspring per brood, and when dealing with a mix that results in either A or B (Blue or Het for Blue for example)... it's fairly safe to say half will be Blue & half will be Het for Blue.

But... (there's always a but isn't there)...

When we start dealing with the complexities suggested in Auratum's second chart... phew... The chart is accurate, but there is a lot of 'averaging' going on. There are no promises that it will be evenly distributed as displayed in that chart.

Making a chart for Blue & Gold x Blue... or Blue & Gold x Gold... will be fairly simple and reliable despite the averaging...

But if you want charts to display a Blue & Gold x Blue & Het for Gold... or any other such combination... I think the averaging may get a bit out of control to the point of being misleading...

The Odds are predictable... but where the odds play out is still random...