Androgenetic Reproduction in a Freshwater Diploid Clam Corbicula fluminea (Bivalvia: Corbiculidae)

Two shell color types of the exotic bivalve Corbicula fluminea were collected in Kyoto city, Japan. DNA microfluorometry revealed that both types were diploids with non-reductional spermatozoa. Maternal chromosomes were found to be extruded as two polar bodies at the first meiosis, and the second me...

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Published inZoological Science Vol. 20; no. 6; pp. 727 - 732
Main Authors Ishibashi, Ryo, Ookubo, Kennichi, Aoki, Mina, Utaki, Minako, Komaru, Akira, Kawamura, Kouichi
Format Journal Article
LanguageEnglish
Japanese
Published Japan Zoological Society of Japan 01.06.2003
UniBio Press
Subjects
androgenesis
Androgens - pharmacology
Animals
Bivalvia - genetics
Bivalvia - physiology
clam
Corbicula
Corbicula fluminea
Corbicula leana
Cytophotometry
DNA - analysis
Female
fertilization
Fertilization - physiology
Freshwater
Male
meiosis
Meiosis - physiology
Original s
Pigmentation
Ploidies
Zygote - physiology
Japan, Honshu, Kyoto Prefect., Kyoto
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Summary:Two shell color types of the exotic bivalve Corbicula fluminea were collected in Kyoto city, Japan. DNA microfluorometry revealed that both types were diploids with non-reductional spermatozoa. Maternal chromosomes were found to be extruded as two polar bodies at the first meiosis, and the second meiosis could not be observed. Only the male pronucleus was present in the egg cytoplasm and became metaphase chromosomes at the first mitosis. The present study indicates that the diploid C. fluminea in Japan has the same mode of androgenetic reproduction as the triploid C. leana.
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ISSN:0289-0003
DOI:10.2108/zsj.20.727