Oh, to have that problem, Treacy
Are you already published in one or more genre? Or are you at the submission stage?
Submissions are directed at agents who specialize in that genre, so basically you would have a different agent (and different publishers) for each type of work.
It is probably best to ask your Agents whether or not you need a pen name to keep your work, and your readerships, seperate. They may well say yes.
- NaomiM