244bp duplication between nucleotide position 1105 and 1106 (corresponding to a position between amino acids 277 and 278 of the wild type sequence) with the preceding 244bp duplicated.
The net1 phenotype (ectopic veins, vein networking) can be enhanced by combination with CycGHR7 but also by combination with mutant alleles of unrelated factors roughoid ru1 or speck sp1 demonstrating high susceptibility of the net1 phenotype to perturbed genetic background.
net1 homozygotes develop extra vein tissue, mainly in the form of ectopic transverse connections between L2 and L3 and between L4 and L5. This phenotype is enhanced by ash2I1/+ which also have a reduction in the size of the intervein regions between L2 and L3 (submarginal cell) and between L4 and L5 (discal cell and second posterior cell). The resulting wings have a lanceolate shape.
Bridges, 10th March 1931.