If he was a catahoula, then he had hunting in his blood...I think the question is redundant. Genetics are the key to everything. You can't train a dog to do anything unless it possesses the genetic potential to do so. Those arguing that training is more important are just arguing for genetics. If a dog hunts a mile out without ever being "trained" to hunt a mile out, this is genetic. If you were somehow able to "train" a dog to hunt a mile out, well then you were only able to do so because the dog had the genetic ability to hunt a mile out...On the other hand, you can't train dogs to fly...Maybe I'm looking at it wrong. Lots of variables to consider, but genetics and certain genetic traits are easier to control for/isolate when considering the determining factor for how/why a dog performs.
That pretty much sums it up right there.
Without genectics, all the training/exposure is pointless... you can't train the "hunt" into a dog.