Eine Pigmentmangelmutante bei dem Polychaeten Platynereis dumerilii

Summary

• 1. A mutant in Platynereis dumerilii was found in laboratory stock. The eye pigment cells are not colored in the mutant (Fig. 1b); the eye cup shows organe color. In comparison the eyes of epitokous wild type specimens are a dark marron.

• 2. The organe eye color of the mutant is due to the recessive or-allele, its inheritance obviously being monofactorial. Back cross progeny (F₁ x orange eye phenotype) showed 1:1 segregation: In 7 crosses analysed 3–5 days after fertilization 2025 or and 2027+ specimens were found.

• 3. The or gene evidently is not linked to sex determination factors.

• 4. The or allele affects the pigmentation of body segments (Fig. 3) as well as eye color. For instance, in or/or progeny pigment is absent in iridocytes.