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Meiotic chromosome configurations in triploid progeny from reciprocal crosses between wild-type diploid and natural tetraploid loach Misgurnus anguillicaudatus in China

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タイトル: Meiotic chromosome configurations in triploid progeny from reciprocal crosses between wild-type diploid and natural tetraploid loach Misgurnus anguillicaudatus in China
著者: Li, Ya-Juan 著作を一覧する
Gao, Yang-Chun 著作を一覧する
Zhou, He 著作を一覧する
Ma, Hai-Yan 著作を一覧する
Li, Jia-Qi 著作を一覧する
Arai, Katsutoshi 著作を一覧する
キーワード: bivalent
gamete
hybrid
polyploid
trivalent
univalent
発行日: 2015年10月
出版者: springer
誌名: Genetica
巻: 143
号: 5
開始ページ: 555
終了ページ: 562
出版社 DOI: 10.1007/s10709-015-9853-2
抄録: Here, we showed meiotic chromosome configurations prepared from oocyte germinal vesicles and spermatocytes of triploid loaches produced from reciprocal crosses between wild-type diploids (2n = 50) obtained from Dalian, Liaoning Province, China and natural tetraploids (4n = 100) from Chibi, Hubei Province, China. Major meiotic cells in triploids comprised 25 bivalents and 25 univalents, but cells with one to five trivalents were also observed. When three homologous chromosomes bearing nucleolar organizing regions (NOR) were identified with the detection of signals or positive sites by silver staining, chromomycin A3 staining and fluorescence in situ hybridization with a 5.8S + 28S rDNA probe, two third of selected triploid cells gave a configuration including one bivalent with two NORs (association of two homologous chromosomes) and one univalent with one NOR. However, other triploid cells showed three univalent each of which had one NOR, suggesting a failure of synapsis between homologous chromosomes. These results suggested that triploid female and male should produce aneuploid gametes with the theoretical mode at 1.5n (37 or 38 chromosomes).
Rights: The final publication is available at link.springer.com
資料タイプ: article (author version)
URI: http://hdl.handle.net/2115/62882
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 荒井 克俊

 

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