The RGS gene loco is essential for male reproductive system differentiation in Drosophila melanogaster

Table 1 Complementation tests for male fertility

Male	Average number of progeny produced per cross
loco ³⁵⁸ /loco ³¹⁸	14
loco ³⁸⁷ /loco ³¹⁸	3
loco ³⁸⁷ /loco ³⁵⁸	3
loco ³⁷⁰ /loco ³⁵⁸	8
loco ³⁷⁰ /loco ³¹⁸	49
loco ^T1 /loco ³¹⁸	5
loco ^Δ113 /loco ³⁸⁷	7
loco ^Δ113 /loco ³⁵⁸	2
loco ^Δ113 /loco ³¹⁸	68

Flies heterozygous for each of the male semi-sterile lines and one of the Df lines that affects loco (loco^Δ13) were crossed and rare heteroallelic mutant males were collected. Groups of 2–3 males crossed with 3–4 OrR females would normally generate several hundred progeny if the males are also OrR. Each experiment was repeated twice. No adult males were obtained for loco⁴⁵⁵.

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