How might genetic modification impact upon artificial selection?

Question

As above :D

By genetic modification, I mean particularly in the case of transgenic organisms.

Answer 1

Hard to say. It is possible to use GM to "crack" problems that couldn't be solved by artificial selection.

Artificial selection exhausts genetic variation, resulting in diminishing returns and also a lot of inbreeding. One could use genetic modification to insert a desired trait into dozens of unrelated individuals, retaining their genetic variation for all other traits.