Back to parent mating does not set new bloodline
A popular inbreeding method is the mating of offspring back to father or mother. This is also a method of line breeding. The method calls for a series of back to original parent mating. It is what most breeders of game fowl, old and new, know and do.
With this usual practice of back to parent mating, in the first generation, 50% of the offspring’s blood come from the father and 50% from the mother. When you back breed further the son or daughter to either of the parents the result will be that the stag or pullet will carry ¾ of the blood of one parent and 1/4 of the other. If you again breed the grandson/daughter back to the parent then 7/8 of the blood is attained. Then 15/16, 31/32, 63/64 so on and so forth.
One important thing we have to bear in mind is that in back to parent methods, each generation differs in genetic composition from the previous generation. That means no genetic composition has been maintained, thus no composition has been locked. The genetic composition changes from generation to generation as the blood of one parent increases while that of the other decreases.
Although the above method of back to parent mating is the most known, it is by no means the only back to parent method. There are others. Although the objective, might in most cases, remains the same, there will be differences between methods, as each has its own advantages and disadvantages.
One of these other methods of back to parent mating is what we call “rolling back to parent” method. We believe only a few, mostly true game fowl breeders, know or practice this.
In this method, the stag or pullet is back bred to its immediate parent, not to the original parent or the P1 generation. For example the F2 stag or pullet is bred back to the F1. The F3, bred back to F2, the F4 bred back to F3, no generation is ever bred back to P1, the original parents.
Proponents of this method, including us at RB Sugbo Gamefowl Technology, find a number of advantages in applying this method. One of the advantages is that certainly the parent being used is always young. Another is that from generation to generation the proportion of the blood between the two original parents is not altered as drastically as the case would be if the back to the original parent is practised.
There are other details of the advantages. However, because of the weight of these other details and advantages, we better devote some further time for discussion of the matter. More importance is due to the said subject matters.
There are many ways, but always remember, that it's not the formula which is important. Breeding is not mathematics but genetics. What is important are traits and not numbers or blood percentages.
.
.
.
.
.
.
