Deletion of sequences encoding lgs amino acid residues 318-345 (the HD1 domain), plus mutation of two pygo amino acid residues (the changes are Y748A and L789A).
lgs::pygoΔHD1.Y748A.L789A.T:Ivir\HA1 is able to rescue the phenotype of lgs20F/lgs20F and pygo130/pygo130 single mutants, and of lgs20F/lgs20F pygo130/pygo130 double mutants.