ABC has canceled the revival of Roseanne -- which has been one of the year's biggest network TV hits and had already been renewed for a second season -- following Roseanne Barr's Twitter tirade this morning that included a now-deleted tweet where she said former Obama administration adviser Valerie Jarrett is a product of the Muslim Brotherhood and Planet of the Apes:

"Roseanne’s Twitter statement is abhorrent, repugnant and inconsistent with our values, and we have decided to cancel her show,” ABC Entertainment president Channing Dungey said in a statement. Roseanne later apologized for the tweet, saying "I apologize to Valerie Jarrett and to all Americans. I am truly sorry for making a bad joke about her politics and her looks. I should have known better. Forgive me-my joke was in bad taste" and also said she was leaving Twitter. She also attacked Chelsea Clinton in during the Twitter tirade.

Even before ABC canceled the show, show writer and comedian Wanda Sykes said she was leaving the series over the comments -- co-showrunner Whitney Cummings left the series earlier this month -- and Sara Gilbert condemned her comments.

UPDATE: She's been dropped by her talent agency, ICM Partners, as well.