Wondering if anyone else has done any hybridizing with the genus, Julidochromis? I have a marlieri male and a dickfeldi female that have raised 2 broods so far.....oldest are still quite young but appear to be mottled like marlieri. 
Julidochromis hybrids
- Thread starter Mikhail Kalashnikov
- Start date
If you keep Rift Lake cichlid, you will run into a lot of hybridization. Most random or accidental hybridization don't improve the appearance, just make weird looking mutt. I have no objection to creating line breed hybrids for the hobby if there is a goal to enhance certain desirable traits, such as intensely red peacock or big hump FH. But randomly producing hybrids to pollute the gene pool is ba
Hybridizing can no more damage the wild species than raising puppies from a dog can damage the wild wolf genotype. It's absurd.
The trick to developing new colors, patterns and behaviors from 2 or more species is in the subsequent generations. To take a page from the greatest hybridizer of all time, Luther Burbank, if they are not fertile, it's a waste of time.
Here's how it works;
When you cross 2 individuals, usually the offspring will be all similar, and less colorful than either parent. Not an absolute rule, but certainly the correct expectation. But when you sibling-cross these F1 hybrids (more on nomenclature next paragraph), the recessive alleles can show themselves in a myriad array of combinations! So the F2 generation is almost always the first goal.
Filial Generations terminology has been misused in the fish hobby for decades. Fish hobbyist use it as in how many generations removed from the wild. This use has virtually no use in the world of science, genetics and facts. The correct use is in measuring distance from specific parent cross, P1. Does not have to involve hybridizing, it is also used in line breeding and other techniques within species and/or breeds. F1 = young from P1. F2 is offspring from 2 F1's mated together, etc.
One last thing. In the world of breeding, we must always consider the problem of homozygousity digression. This is a condition where the genetic pool is too small and for some unknown reason, as a breeding group becomes more and more homozygous they loose vigor. So, if one were to continue the filial interbreeding for an extended period of time, the individuals produced would/could eventually become so weak that they are useless. Usually around F4 things start getting weird! But, to extrapolate that out further, if you can manage to make it to F20 or so, the trend usually reverses, presumably because deleterious genes have been eliminated but the reason isn't clear. I have proven this personally in Columbia livia.
quoting myself from other source
The trick to developing new colors, patterns and behaviors from 2 or more species is in the subsequent generations. To take a page from the greatest hybridizer of all time, Luther Burbank, if they are not fertile, it's a waste of time.
Here's how it works;
When you cross 2 individuals, usually the offspring will be all similar, and less colorful than either parent. Not an absolute rule, but certainly the correct expectation. But when you sibling-cross these F1 hybrids (more on nomenclature next paragraph), the recessive alleles can show themselves in a myriad array of combinations! So the F2 generation is almost always the first goal.
Filial Generations terminology has been misused in the fish hobby for decades. Fish hobbyist use it as in how many generations removed from the wild. This use has virtually no use in the world of science, genetics and facts. The correct use is in measuring distance from specific parent cross, P1. Does not have to involve hybridizing, it is also used in line breeding and other techniques within species and/or breeds. F1 = young from P1. F2 is offspring from 2 F1's mated together, etc.
One last thing. In the world of breeding, we must always consider the problem of homozygousity digression. This is a condition where the genetic pool is too small and for some unknown reason, as a breeding group becomes more and more homozygous they loose vigor. So, if one were to continue the filial interbreeding for an extended period of time, the individuals produced would/could eventually become so weak that they are useless. Usually around F4 things start getting weird! But, to extrapolate that out further, if you can manage to make it to F20 or so, the trend usually reverses, presumably because deleterious genes have been eliminated but the reason isn't clear. I have proven this personally in Columbia livia.
quoting myself from other source