Phenotypically wild-type. Df(2L)S4/astrv1 slightly more extreme than Df(2L)S4/+; SL and SM slightly less extreme when heterozygous with astrv1 than with wild type. RK3A.
Inseparable from wild-type in combination with S1ast+, S1ast1, S1ast4, or E(S)1. Viable in combination with Df(2L)S4, resembling S1/+ rather than Df(2L)S4/+. astrv1/SM and astrv1/SL flies have eyes which are slightly less rough than those of SM/+ or SL/+ flies.