Transgenic Seed: The High Technology Test of Antitrust?

The recent flurry of publicity in transgenic (also known as genetically modified or “GM”) seed reveals a broader controversy over competition policy in high technology industries. What constitutes conduct by a patent-holder that is legitimately within its rights, versus what exceeds the scope of a patent? More specifically, how should antitrust deal with a patent-holder that is also a dominant firm, and alleged to have maintained or leveraged its monopoly by