Developmental Capacity and Chromosome Number in the Offspring of Artificially Produced Autotetraploids of Rana nigromaculata(Genetics)

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概要

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• A large number of autotetraploids of Rana nigromaculata were produced in order to assess their developmental capacity and chromosome number in their offspring. An original autotetraploid male was first produced by transplanting a nucleus from an embryo (triploid) into an unfertilized egg. Next, eggs were inseminated with sperm of the autotetraploid male, then cold-treated to obtain first-, second-, and third-generation offspring. According to an investigation of the chromosome numbers of the tadpoles by the tail-tip squash method, the three generations of offspring included many tetraploids (50-80%), as well as some diploids, triploids, hexaploids and mosaics at the early tadpole stage. In addition, several percent of the second- and third-generation offspring were found to be aneuploids. Evidently, a complete set of diploid chromosomes was not precisely transferred to all of the next-generation offspring from the sperm of the artificially produced autotetraploid males. These observations suggest that there were some abnormalities in the course of spermatogenesis in the male autotetraploid frogs.

• 社団法人日本動物学会の論文
• 2002-08-25

著者

• Kondo Yasuyuki

  Institute For Amphibian Biology Graduate School Of Science Hiroshima University

関連論文

• REPRODUCTIVE ISOLATION MECHANISMS IN THE RICE FROG RANA LIMNOCHARIS FROM SRI LANKA, THAILAND, AND JAPAN(Taxonomy and Systematics)(Proceedings of the Seventy-Third Annual Meeting of the Zoological Society of Japan)
• EXPERIMENTALLY INDUCED AUTOTETRAPLOIDY AND AMPHIDIPLOIDY IN TWO JAPANESE POND FROGS(Taxonomy and Systematics,Abstracts of papers presented at the 74^ Annual Meeting of the Zoological Society of Japan)
• Developmental Capacity and Chromosome Number in the Offspring of Artificially Produced Autotetraploids of Rana nigromaculata(Genetics)

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