Meiosis of autotetraploid <I>Osmunda lancea</I> produced by apospory
スポンサーリンク
概要
- 論文の詳細を見る
Autotetraploid <I>Osmunda lancea</I> (2n=4x=88) was produced artificially by apospory. The meiotic chromosome configulation of the autotetraploid <I>O. lancea</I> showed the maximum 21 quadrivalent chromosomes at prophase I, in most of the spore mother cells. Their metaphase I plates additionally showed univalent, bivalent and multivalent chromosomes. Anaphase I and II plates showed frequently laggards. To make the meiosis regularly, the suppression system of multivalent chromosome formation might be obtained in the process of evolution in autoploid ferns in nature. Aposporous sporophytes could not be induced from the autotetraploid <I>O. lancea</I> anymore.
著者
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Kato Juntaro
Department Of Biology Aichi University Of Education
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Masuda Yu
Laboratory Of Plant Chromosome And Gene Stock Graduate School Of Science Hiroshima University
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KAWAKAMI Suzue
Nishio Nursing College
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Kawakami Toshiyuki
Hiroshima Kokusai Gakuin High School, Kaita, Aki-gun, Hiroshima 736-0022, Japan
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Kato Juntaro
Department of Biology, Aichi University of Education, Igaya, Kariya City, Aichi 448-8542, Japan
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Kawakami Suzue
Nishio Nursing College, Togasaki, Nishio City, Aichi 445-0074, Japan
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