Hybrid Hmr1 males (progeny of Hmr1 LhrT:Ivir\HA1 D. melanogaster females mated to D. mauritiana males) carrying LhrT:Ivir\HA1 show 32-44% viability at room temperature and 52-69% viability at 18[o]C (compared to hybrid Hmr1 males not carrying LhrT:Ivir\HA1).
LhrT:Ivir\HA1 fully complements Dsim\Lhr1, which is observed as hybrid male inviability in the progeny of a cross of D. melanogaster females carrying LhrT:Ivir\HA1 to D. simulans Dsim\Lhr1 males.
LhrT:Ivir\HA1 has little effect on the viability of hybrid HmrDf males (progeny of HmrDf LhrT:Ivir\HA1 D. melanogaster females mated to either D. simulans or D. mauritiana males).
LhrT:Ivir\HA1 reduces the viability of hybrid Hmr1 males (progeny of Hmr1 LhrT:Ivir\HA1 D. melanogaster females mated to either D. simulans or D. mauritiana males).