著者

Yuki Hara Kenta Adachi Shunsuke Kagohashi Kazuo Yamagata Hideyuki Tanabe Shinji Kikuchi Sei-Ichi Okumura Akatsuki Kimura

出版者

THE SOCIETY OF CHROMOSOME RESEARCH

雑誌

Chromosome Science (ISSN:13441051)

巻号頁・発行日

vol.19, no.1-4, pp.43-49, 2016 (Released:2017-06-26)

参考文献数

22

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Across species, eukaryotic chromosomes share common features at the molecular level. However, common features at the cellular level are not well investigated. A correlation has been suggested between the linear packing ratio of mitotic chromosomes and the intra-nuclear DNA density, by comparing these values in the nematode Caenorhabditis elegans. In this study, these values were measured and compared among several metazoan and plant species. The obtained values corroborated the correlation proposed in the previous study, supporting the theory that intra-nuclear DNA density is a common regulator of chromosome condensation. Moreover, the comparison among different species suggested a correlation between the length of a mitotic chromosome and the nuclear volume to the power of 2/3. Given this observation, we speculate that: (i) a rate-limiting component defines the length of a mitotic chromosome that is proportional to the nuclear surface area, and (ii) such regulation of the mitotic chromosomal length may play a role in maintaining the ratio between the cell size and the metaphase plate.

著者

菊地 伸二 Shinji Kikuchi 平安女学院大学生活福祉学部

出版者

平安女学院大学

雑誌

平安女学院大学研究年報 (ISSN:1346227X)

巻号頁・発行日

no.8, pp.21-29, 2007

著者

Mari Sugiyama Miyu Norizuki Shinji Kikuchi Yasuo Yasui Katsuhiro Matsui

出版者

Japanese Society of Breeding

雑誌

Breeding Science (ISSN:13447610)

巻号頁・発行日

vol.73, no.2, pp.230-236, 2023 (Released:2023-06-06)

参考文献数

27

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Common buckwheat (Fagopyrum esculentum) is an annual self-incompatible plant that is widely grown. The genus Fagopyrum comprises more than 20 species, including F. cymosum, a perennial that, unlike common buckwheat, is highly resistant to excess water. In this study, we developed interspecific hybrids between F. esculentum and F. cymosum via embryo rescue, to improve undesirable traits of common buckwheat, such as low tolerance to excess water. The interspecific hybrids were confirmed by genomic in situ hybridization (GISH). We also developed DNA markers to confirm the identity of the hybrids and if genes derived from each genome were inherited by the next generation. Observations of pollen indicated that the interspecific hybrids were essentially sterile. Unpaired chromosomes and abnormal segregation during meiosis were likely responsible for the pollen sterility of the hybrids. These findings could facilitate buckwheat breeding to produce lines that can withstand harsh environments with wild or related species in the genus Fagopyrum.

著者

菊地 伸二 Shinji Kikuchi

雑誌

研究紀要 = Nagoya Ryujo Junior College annual report of studies (ISSN:13427997)

巻号頁・発行日

vol.36, pp.53-61, 2014-12-20

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アウグスティヌスは、カトリック教会に回心した後、約15年間にわたり、さまざまな「マニ教反駁書」の執筆にとりかかる。この小論では、「マニ教反駁書」の中でも、とくに、聖職の道を歩み始めた後に書かれた二つの作品である『二つの魂』と『マニ教徒フォルトゥナトゥス駁論』を取り上げて考察する。この二つの作品において、アウグスティヌスは、マニ教が主張するところの善悪の二つの本性を徹底的に批判するとともに、悪の原因を人間の自由意思のうちに求めていくが、そのような人間の自由の擁護は、神の自由というより完全な姿を前提とすることによって成立するものである。また彼は、「マニ教反駁書」を執筆するという営みの中で、マニ教徒の「パウロ書簡」の解釈に出会うとともに、そのような解釈を批判する中で、自らが「パウロ書簡」のより精緻な読解へと導かれていくのであり、そのことが彼の「自由意思」の理解を深めることにつながっていくのである。

著者

菊地 伸二 Shinji Kikuchi 名古屋柳城短期大学 Nagoya Ryujo (St. Mary's) College

雑誌

研究紀要 = Nagoya Ryujo (St. Mary's) College annual report of studies (ISSN:13427997)

巻号頁・発行日

no.19, pp.177-206, 1997-01-01