+ Site Statistics
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

The mode of sex determination in dinophilus gyrociliatus archiannelida

International Journal of Invertebrate Reproduction & Development 11(2): 159-172

The mode of sex determination in dinophilus gyrociliatus archiannelida

The regular occurrence of a univalent sex chromosome in male meiosis but not in female meiosis was confirmed by light (orcein staining of squash preparations) and electron microscopical (3-D-reconstruction of serial sections) techniques. Therefore, male heterogamety, most probably of the XO-XX type, is present in Dinophilus. This seems to be in conflict with the obvious occurrence of two types of eggs, large ones and small ones, that normally give rise to females and males, respectively. The review of available data shows that the control of egg ratio and therefore of sex ratio in Dinophilus gyrociliatus is progamic and influenced by environmental as well as genetic conditions. Sex determination eventually is syngamic and brought about by selective fertilization of large eggs by female determining sperms and of small eggs by male determining sperms.

(PDF 0-2 workdays service: $29.90)

Accession: 006719475

Related references

Zur sexualitat von Dinophilus gyrociliatus (Archiannelida) 2. Die geschlechtsbestimmung. Biol. Zbl.: 89: 137-161, 1970

Feeding and digestion in Dinophilus gyrociliatus (Annelida: Archiannelida). Journal of Zoology London, 158: 441-451, 1969

Zur Sexualitat von Dinophilus gyrociliatus (Archiannelida). 2. Der Aufbau des Ovars und die Oogenese. Biologisches Zentralblatt, 88: 695-714, 1969

On the sexuality of dinophilus gyrociliatus archiannelida part 2 structure of the ovary and oogenesis. Biologisches Zentralblatt 88(6): 695-714, 1969

A mutant of Dinophilus gyrociliatus (Archiannelida) with enlarged male type eggs. Experientia 22(4): 237-238, 1966

Genetic analysis of 2 mutants of dinophilus gyrociliatus archiannelida with changed egg size. Helgolaender Wissenschaftliche Meeresuntersuchungen 18(3): 296-316, 1968

Genetische Analyse zweier Mutanten von Dinophilus gyrociliatus (Archiannelida) mit veranderter Eigrosse. Helgolander Wissenschaftliche Meeresuntersuchungen, 18: 296-316, 1968

Zur Sexualitat von Dinophilus gyrociliatus (Archiannelida). 1. Der Einfluss von aussenbedingungen und genetiachen Faktoren auf das Geschlechtsverhaltnis. Biologisches Zentralblatt, 88: 469-495, 1969

On the sexuality of dinophilus gyrociliatus archiannelida part 1 the influence of external conditions and genetic factors on the sex ratio. Biologisches Zentralblatt: 469-495, 1969

Effects of zinc on demography of three generations of Dinophilus gyrociliatus Polychaeta Effetti de zinco su tre generazioni di Dinophilus gyrociliatus Polychaeta un approccio demografico. Biologia Marina Mediterranea, 102: 636-639 (Parte Seconda), 2003