Embryos expressing S6kdsRNA.Scer\UAS.cUa under the control of Scer\GAL4kirre.PU show a significant reduction in the size of the segmental border muscle and the DA1 muscle, and also in the number of nuclei present in these muscles.
Embryos expressing S6kdsRNA.Scer\UAS.cUa under the control of Scer\GAL4kirre.PU have thinner muscles than normal and unfused myoblasts are present.