Perms in and of themselves have been "dreaded" by many so why not use them to create dreadlocks?
Dread perms are traditionally used on those with naturally straight (Type 1/Caucasoid/Asian) hair.
With this method the objective is to change the texture of the hair so that it's better able to hold a twist.
A stylist deliberately over-processes the hair and sets it on small perm rods.
The resulting curly textured hair is usually twisted, a holding agent is added, then the hair is re-twisted and backcombed. Rubber bands are used to secure the ends.
At least four to six inches of hair is needed for this method. There are a growing number of salons that are adding this technique to their repertoire. So before you go out and buy a home perm, see if you can locate professional services in your area.

As always, consult a professional before you attempt any style.
Photo courtesy of German based salon http://www.seienstyle.net/