Abstract
D. gyrociliatus has two types of eggs: a smaller type giving rise to ♂♂, and a larger type developing into ♀♀. Two mutants, which originated in laboratory cultures derived from animals collected at Helgoland, produced eggs of an abnormal size; the first, "Gr", yielding larger-than-normal male-type eggs, the second, "Kl", smaller male-type eggs. Size of eggs is determined by the genotype of the mother, the genotype of the eggs being without influence. Both mutants show a dominant monofactorial inheritance. In crosses with Gr/Gr-individuals an exceptionally high rate of reverse mutations to wildtype (1,4 to 5,0 %) has been observed. Results indicate that Gr is either an unstable gene or a chromosome mutation in the form of a duplication or trisomy of one chromosome.
Translated title of the contribution | Genetic analysis of two mutants of Dinophilus gyrociliatus (Archiannelida) with changed egg-size |
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Original language | German |
Journal | Helgoländer Wissenschaftliche Meeresuntersuchungen |
Volume | 18 |
Issue number | 3 |
Pages (from-to) | 296-316 |
Number of pages | 21 |
ISSN | 0017-9957 |
DOIs | |
Publication status | Published - 08.1968 |
Research Areas and Centers
- Academic Focus: Center for Infection and Inflammation Research (ZIEL)