The wild-type Dsim\Lhr coding sequence present in Dsim\Lhr+tMa has been replaced with the mutant Dsim\Lhr2 coding sequence. Three copies of the Tag:HA tag have been inserted at the C-terminal end of the mutant coding region.
Hybrid Hmr1 males (progeny of Hmr1 Dsim\Lhr2.T:Ivir\HA1 D. melanogaster females mated to D. mauritiana males) carrying Dsim\Lhr2.T:Ivir\HA1 are fully viable at 18[o]C and have substantially higher viability (138.8-144.3%) at room temperature compared to hybrid Hmr1 male siblings not carrying Dsim\Lhr2.T:Ivir\HA1.
Dsim\Lhr2.Tag:HA partially rescues Dsim\Lhr1
Dsim\Lhr2.T:Ivir\HA1 partially complements Dsim\Lhr1, which is observed as 35-40% hybrid male viability in the progeny of a cross of D. melanogaster females carrying Dsim\Lhr2.T:Ivir\HA1 to D. simulans Dsim\Lhr1 males.