I don't have club root (at the moment, fingers crossed), but I asked about it on another thread and a couple of people commented. The upshot was grow seedlings in pots and don't transplant till a decent size, plus, sprinkle the transplanting hole with lime before putting the plant in. The thread was not directly about club root, however.

If you search the forum, you might come up with some more info. If not, start a thread of your own on club root and you'll probably get lots of advice about techniques and varieties.