No molecular lesion defined in the ORF.
General characteristics of mutant phenotype: Song pulse - wild-type; Optomotor test - mutant; CC-phototaxis - neg.; Y-phototaxis - neg.; ERG transients - mutant; ERG LCRP amplitude - mutant; ERG LCRP kinetics - mutant; ERG Rebound - wild-type; ERG refractory wandering - mutant.
Electroretinograms (ERG) lack the on- and off-transients.
Males have a normal courtship song.
Abnormal visual response: prefers dark.
The 'ldg' (lamina-degeneration) designation for is a misnomer.
Extensive phenogenetic analysis of allelic combinations reveals a phenotypic series for visually mediated behaviors and genetically separable ERG defects and courtship song defects.
Failure to complement statements based on ERG phenotype. Complements statement based on singing behaviour.
Eichenberger.