r2d21 mutant flies homozygous for AGO2T:Zzzz\FLAG,T:Ivir\HA1 are fertile.
The severely reduced fertility and sperm deficiency of either AGO2454/Df(3L)BSC558 or AGO2321/Df(3L)BSC558 mutant males is rescued by combination with AGO2T:Zzzz\FLAG,T:Ivir\HA1.