Ancistrus genetics question

Hi all.

I was wondering if anyone knows what the outcome would be,if one breeds a blackeyed golden bristlenose to an albino?

Thanks!

 

Not too sure about the species or which traits are dominant and recessive as the alleles ( part of the chromosome which codes for a specific trait ) for pigment in guppies for example may posses a dominant nature when in certain colour combinations and visa versa.

However albinism is a recessive trait which means that if you cross an albino parent with a normal parent the offspring would all be normal . However if you inbreed the albino parent with any of the first generation offspring you should have a 50% chance of getting albino offspring . Both of these statements would hold true only if the original normal parent has no albino relatives - if it does you would see the albinism being genetically expressed in the first generation .


For more information google " punet squares " as they are the simplest form of explaining genetic phenomenon .

hope it helps

 

Thanks a lot DS DG for your answer!

I am aware that albinisim is recessive and therefore will not show in the F1 generation of this crossing.
The reason why i asked this question is because i wasnt sure about the genetic background of the golden blackeyed variety.
However,after doing some more research on the matter,i learned that this variety of bristlenose is also a recessive colour morph otherwise known as L144.

So according to the punnet square,albino x L144 will result in all normal(wildtype) looking offspring,being hetero for L144 and albino.

 

Hmm, very interesting ...but if both are recessive that being the golden and albino , I would assume in my limited knowledge , that all the offspring will either golden or albino - with possible variation causing some "normal" .

But this is a very interesting question.Hahaha, there should be a thread dedicated to fish genetics :')

 

If both are recessive there won't be "normal" ones to me. Think the albino is "the most recessive" so if the golden has no albino ancestors F1 will be golden.
L144 has blue eyes btw!!

Interesting stuff indeed hahaha

 

I agree @DoubleDutch , but I would think that the golden variety may be co-dominance or incomplete dominance as it's a form of albinism that doesn't alter all of the traits . If we could identify the genotype of the normal, golden and albino and compare them we could make a definite answer ... Maybe I'll research if I get the chance

 

Albinos lack all pygments, xanthorists only lack black pygments to me. That's why albino ancistrus are whitish and L144 yellow/orange (the pygments they still have).

Can you read Afrikaans: this is in Dutch

Overzicht erfelijke aandoeningen bij vissen - LICG

 

Struggled a bit until google offered to translate for me =D . Incredibly interesting indeed , a follow up question would be if the colour mutations would really have a noticeable impact on life span in domesticated species rather than in the wild ... But that would be for another thread , appreciate the info their @DoubleDutch and I hope this answers your question @TheEel . For more information of fish genetics check out guppy breeding genetics

 

Think this mutations (both) in the wild normally won't survive very long. But I like my L144s

Even have one Corydoras Paleatus Xanthorist (never ever seen this elsewhere).

 

Very nice ! I had an albino Cory and also haven't seen a Xanthorist one any where :/

 

Then there is another colormutation : Leucism !

 

Hahahah =D yea I've exhausted my knowledge on this matter =D rotfl

 

Hi DoubleDutch.

Thanks for adding those nice pictures.That cory cat of yours is truly stunning!
You are right,the iris of the L144 is blue and the pupils are black,while true albinos will have red pupils.
But i do not agree with the rest of your statement.

Albino x L144 will result in all normal looking(het.albino,het.L144) offspring.
The reason for this is that both conditions are recessive yes,but are caused by two different genes,that are not compatible to each other.
Also there is no such thing as "the most recessive",it either is recessive or it is not.

However,it will get more interesting if one breeds the F1 generation back to each other again and should result in the following outcome:

6.25% normal
12.5% het. L144
6.25% homozygous L144
12.5% het.albino
25% het.albino,het.L144
12.5% het.albino,homozygous L144
6.25% homozygous albino
12.5% homozygous albino,het.L144
6.25% homozygous albino,homozygous L144

I hope i will be able to try this myself in the near future,with the goal to produce a fish thats homozygous for both traits.

Thanks a lot again for everyones input!

 

Thanks for your response. Very interesting.
"The most recessive" was a way of speaking to male clear it lacks all pygments, but still asking myself if both are recessive how will it end up with wild colored in F1.
When there are "wild colored" gens in a albino/L144 to me they won't be white / yellow, would they?? Trying to find an Albino female Paleatus to breed this one !!! Otherwise I'll give it a try with my "normal" ones.

Cheers Aad

 

Very interesting guys!

Just need some info, I got two normal BN plecos, and noticed that the edges of their tail fin and dorsal fin are white. Almost like the starlight plecos. Is this due to genes or is it a mutation of the albino genes?

 

That's quite normal with BN's