AI has the potential for great improvement but it can be misused. Inbreeding and line breeding done by people that aren't understanding of the consequences and realities, and willing to take questionable risks, have created the genetic anomalies that we all know about. But the fact that any given bull has the potential to cover a significant percentage of cows in any given year and can do it for decades speaks to the potential dangers.
Ai used properly and with care is not the issue. Human error is, just like with any tool we misuse.
Linebreeding and inbreeding when done correctly are the solution not the problem in identifying and eliminating undesired genes from wide spread distribution in the gene pool.
The biggest problem is the crazy high over use by people jumping on the band wagon of using the latest "curve bender" genetics without the proper line breeding /inbreeding to identify and the removal of the undesirable gene mutations that are almost always accompanied by the desired gene mutation.
The basic science of genetics says that almost always when a genetic mutation occurs it is not a single gene mutation,but is a multiple gene mutation that contains both highly desirable mutations as well as undesirable lethal /semi lethal gene mutations
A perfect example of this is the Holstein bull "Pawnee Farm Arlinda Chief "
It is estimated that his single genetic lethal mutation has cost the dairy industry over 500,000 spontaneous abortions resulting in over $420 million in losses . And most now as well as in the past don't give 2
about it . In fact estimates say that at least 14 percent of all Holsteins are his descendants.
How and why is that possible?
Because he was a "curve bender bull "
It is also estimated that his genetics are responsible for over $30 billion in increased milk production.
It is a scientific fact that if you use outlier genetics (curve bender) in mating selection you increase the probability of introducing undesirable lethal,semi lethal genetic mutations in the offspring by a huge percentage.it is almost inevitable that a "curve bender" mutation will also be accompanied by a undesirable lethal/semi lethal mutation as well.
Sometimes this to traits can be separated and the undesirable traits from the desired traits. But sometimes the two genetic mutations are so close to each other on the genome, and will not sort independently of each other, it is virtually impossible to naturally separate the two .