Homozygous flies have small rough eyes and nicked wing veins.
Under 16 hours light : 8 hours dark conditions at 18[o]C, wild-type C.costata files show rapid and synchronous eclosion. However, under these conditions, Ccos\fa1 male larvae require a long growth time to complete their development; the first mutant adults emerge 34 days after oviposition (compared to 31 days in wild-type flies) but few mutant flies emerge in the following 5 days, with the dominant period of eclosion occurring between 40 and 65 days of oviposition. The day of 50% eclosion is 49 days after oviposition in the mutant males, compared to approximately 39 days in wild-type males.
The developmental delay in eclosion in Ccos\fa1 males is recovered if by extension of the light phase to 18 hours light : 6 hours dark conditions. Under these conditions, eclosion of the mutant males starts at 34 days and ends 50 days after oviposition. The median eclosion date is 37.55 days, 1 day later than wild-type males. Increase of the light phase to 20 hours per day further reduces the difference between the eclosion patterns of Ccos\fa1 and wild-type males, and under constant light, the difference is not statistically different.
Ccos\fa1 has abnormal eclosion | recessive phenotype, suppressible by Ccos\npd1
The developmental delay of Ccos\fa1 mutant males seen under 16 hours light : 8 hours dark conditions is recovered if they are also carrying Ccos\npd1. In the double mutants, eclosion starts at 33 days and ends 55 days after oviposition. 50% of the male flies have completed their eclosion around 37 days after oviposition.
Isolated from: Olekminsk, Russia, 1993
