viable (with Df(2L)ED5878)
fs(2)21Ba1/Sam-SR23 females are sterile, while fs(2)21Ba1/Sam-S1 females are fertile. It is possible that fs(2)21Ba1 corresponds to a hypomorphic mutation of Sam-S, but further tests are needed to exclude other possibilities.
Identified on the CyO balancer chromosome of BDSC stock number 3268.