A Hypothesis of Ploidy Elevation by Formation of a Female Pronucleus in the Androgenetic Clam Corbicula fluminea in the Tone River Estuary, Japan(Developmental Biology)
スポンサーリンク
概要
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We propose a hypothesis of ploidy elevation in the androgenetic clam Corbicula fluminea, based on an abnormal process of fertilization in clams collected at the Tone River, Ibaraki Prefecture, Japan. Most eggs showed androgenesis, that is, extrusion of all maternal chromosomes as two polar bodies during the first meiotic division. Most eggs did not form a female pronucleus, but only a male pronucleus. However, some eggs proceeded to the second meiosis and formed both a female and a male pronucleus. The formation of the female pronucleus suggests the hypothesis that ploidy elevation in androgenetic clams may have occurred by aberrant meiosis due to an altered orientation of the meiotic spindle.
- 2006-06-25
著者
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ISHIBASHI Ryo
Fisheries Laboratory of Kinki University
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Komaru Akira
Faculty of Bioresources, Mie University
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Kumamoto Atsuko
Faculty of Bioresources, Mie University
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Kato Takeshi
Faculty of Bioresources, Mie University
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Obata Mayu
Faculty of Bioresources, Mie University
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Nemoto Takao
Ibaraki Prefectural Office
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Obata Mayu
Faculty Of Bioresources Mie University
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Komaru Akira
Faculty Of Bioresources Mie University
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Nemoto Takao
Ibaraki Prefectural Freshwater Fisheries Experimental Station
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Kato Takeshi
Faculty Of Bioresources Mie University
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Kumamoto Atsuko
Faculty Of Bioresources Mie University
関連論文
- A Hypothesis of Ploidy Elevation by Formation of a Female Pronucleus in the Androgenetic Clam Corbicula fluminea in the Tone River Estuary, Japan(Developmental Biology)
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