Married filing separately & Contributions

I want to file separately from my wife. My company offers a 401k but I do not participate and I make way more than $10K annually which eliminates the Roth IRA for me. Can I still open a Traditional IRA for myself? If so, how much can I contribute and how much can I deduct? If not, what are my options for retirement savings other than the 401K and Traditional IRA with any kind of tax incentives?