Agriculture Reference
In-Depth Information
stems, others may have green stems, some might be very potent, and
others might not be so potent. By constantly selecting new traits that
you want to keep, you can manipulate the strain into a totally true
breeding strain for every phenotype. However it is extremely unlikely
that such a strain exists on the market that is 100% true breeding for
every single phenotype. Such a strain would be called 'A perfect IBL'.
If you are able to lock down 90% of the plant's phenotypes in a
population then you can claim that your plant is an IBL. I think in
today's world that this would be an acceptable % to reach.
The core Idea behind this technique is to find what is known
as a 'Donor' plant. A Donor plant is one that contains a true breeding
trait (homozygous Dominant) for that trait. The more lock down traits
are homozygous Dominant the better are your chances of developing
an IBL.
IBL is short for In Breed Line. This does not mean that the
line of genetics will be true breeding for every trait, but in general this
terminology (IBL) used by breeders does refer to a strain as being very
uniform in growth for a high % of the strain's phenotypes.
Let us use the example of hamsters. In a litter of hamsters we
may find that they all have the same phenotypes. If that population
reproduces and no other phenotypes crop up then we can consider the
fact that these hamsters come from an In Breed Line. If the hamsters
continue to breed and all show the same traits without variation then
we know for certain that the gene pool has been locked down.
There are some breeding techniques that you may like to
know about. These techniques can seriously breach the law of Hardy-
Weinberg's Equilibrium. Which in our case can be a good thing
