Google graduate syllabi and find articles that fit your interest. Don't regurgitate the fundamentals of poli sci from undergrad (this will not help) and try and use your masters to make yourself standout. You should tailor your SOP for each program, and given your interests, you should choose your program based on potential advisers and write your SOP for that person. Only apply to the top ten qualitative programs (maybe even top five) in your subfield, but keep in mind that you should be able to find a person that you want to work with BEFORE you apply.
American and Comparative are pretty quantitative these days, so that leaves IR and Political Theory (Of course there are exceptions). Some big names from feminist political theory are Jane Bennet, Lisa Disch and Mary Dietz. International Relations has a large feminist contingent, Ann Tickner and Cynthia Enloe are prominent authors. Look for syllabi with those names (and ideally your potential adviser) and read the articles, see if you can find survey articles that will get you up to speed.
You may also want to consider Sociology PhD programs.