Albino and regular Kribensis breeding

[drjdp]

In my office tank I have two Pelvichromis Pulcher (kribensis) attempting to breed. The female is an albino. Has anyone had success with this combo and what ratio of albino to regular kribensis can I expect? They have been going through the courting motions for several weeks and have dug a network of caves through the 55 gal. tank. The other fish are a breeding pair of Angelfish, a breeding pair of German Blue Rams, and an assortment of freaked out community fish. Must be some Viagra in the water!

 

[lucky777ca]

I would say that you could expect no true albinos and true regular colour kribs on the first spawn. I suppose that it will be like the common x fancy guppies that I bred. The offspring of the two will produce 100% heterozygous offspring with normal coloured offspring since the albino traits will be recessive, while the pigmentation/normal-colouration would be dominant.

But, from the spawning of two F1 fishes would result in:
- 25% normal genotype (meaning all offsprings of two of this type would result in 100% normal coloured kribs, what you would normally find in the stores)
- 25% albinos (recessive, all offspring of two of this type would result in 100% albinos)
- 50% normal phenotype (meaning the breeding of two F2 of this type would result in the same proportions of offsprings that are from a F1 x F1 spawn).

F1 is the parent of F2 and the offspring of the Parents (Female Albino, Male Regular-coloured).

This would provide another way of getting albinos... It's pretty much what I have with my common x fancy guppies. Hopefully, I'll be able to isolate some blue tuxedo guppies from the next set of babies (F2).

 

[jm1212]

if the male carries the albino gene, 50% of the offspring will be albino, and the other half will be heterozygous.

if he doesnt carry the trait, then all of the offspring will be heterozygous.

 

[jpappy789]

Ooh I absolutely LOVE genetics...not. You should have seen the packet that we had to do this year in biology. Genomania!!! WOOHOO!!! Ok, back to your question...

There are a lot more to genetics than pure probabilities and punnet squares...depends on which type of gene albinism is in Kribs. But I'm assuming pigmentation is autosomal dominant-recessive genetics in fish like it is with humans.

It also depends on whether one is regular but is still a carrier of the recessive gene...which is impossible to tell...

Regular (AA) x Albino (aa)

25% AA --> Regular
25% aa --> Albino
50% Aa --> Regular (carrier)

Regular carrier (Aa) x Albino (aa)

50% Aa --> Regular (carrier)
50% aa --> Albino

Of course this is all just probability. Nature usually takes it's own course...

Hope this helps...good luck!

 

[lucky777ca]

Whoops, forgot the fact that the male might be heterozygous or homozygous...

Sorry about that :S