We cannot be misled when it comes to the difference between crossbreeding and inbreeding. We can, in fact tell anybody point blank that such is a basic knowledge in breeding – that when we combine lines, that’s crossbreeding; and when we use relatives in our breeding program, that’s inbreeding.
Right. But did you know that we are supposed to say outbreeding rather than crossbreeding? Outbreeding is supposed to be the opposite of inbreeding. When you mate fowls that are less related to one another than the average degree of relationship in a population, that’s outbreeding; and when you mate fowls whose blood relationship to one another is closer than the average degree of relationship in the population, that’s inbreeding. In fact, crossbreeding is an extreme form of outbreeding.
But of course, let’s stick to what we have been so used to – otherwise, we will end up confusing ourselves. Anyway, this is not really the main contention of this article. What we intend to do is elaborate some of the basic differences between crossbreeding and inbreeding – probably not more on how each is done but on what we can expect if we do it and the underlying responsibilities we ought to remember if we are to carry out a breeding program well.
We do crossbreeding to produce battlefowls – that’s basic. Why, because with crossbreeding, the resulting fowl is a combination of at least two bloodlines. Hopefully, the bloodlines combined are really different not necessarily physically but genetically – meaning, they are really made of different stuff.
Why, because diverse genetic makeups usually result in a nick. The larger the variation in the genetic makeup of the bloodlines combined, the more “impure” the cross becomes – and the higher the probability that he is a good pit warrior. This is heterozygosity at work.
Heterozygosity is the one at work when we cross two highly inbred chickens from different bloodlines. Generally, small as the inbred fowls may be, but we expect them to produce normal-sized, great fighting chickens. Now this is a classic example of hybrid vigor, or heterosis. The progeny is better than one or both of its parents, both in physical appearance and fighting quality.