Currently in ReadyAPI 3.0, it is allowed to create a new Jira ticket but it is not possible to link to a test case. It would be helpful to attach a JIra ticket/tickets to a failed test case. Jira ticket could be of any type(bug, enhancement, task etc.) Clicking on that linked JIra ticket, it will open in Atlassian.
Here you can review submitted feature requests and vote up the ones you like! If you can't find the feature you want - go ahead and suggest your own idea. Ideas with the highest rating can be implemented in the product.