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Extensive Gene Duplications in Diploid Eupatorium (Asteraceae)

1989; Wiley; Volume: 76; Issue: 8 Linguagem: Romeno

10.2307/2444832

1537-2197

Tetsukazu Yahara, T. Kawahara, Daniel J. Crawford, Motomi Itô, Kuniaki Watanabe,

Plant tissue culture and regeneration

American Journal of BotanyVolume 76, Issue 8 p. 1247-1253 Article EXTENSIVE GENE DUPLICATIONS IN DIPLOID EUPATORIUM (ASTERACEAE) Tetsukazu Yahara, Tetsukazu Yahara Botanical Gardens, Faculty of Science, University of Tokyo, 1842 Hanaishi-cho, Nikko, 321-14 JapanSearch for more papers by this authorTakayuki Kawahara, Takayuki Kawahara Botanical Gardens, Faculty of Science, University of Tokyo, 1842 Hanaishi-cho, Nikko, 321-14 JapanSearch for more papers by this authorDaniel J. Crawford, Daniel J. Crawford Department of Botany, The Ohio State University, Columbus, Ohio, 43210-1293Search for more papers by this authorMotomi Ito, Motomi Ito Makino Herbarium, Tokyo Metropolitan University, 2-1-1 Fukazawa, Tokyo 158, JapanSearch for more papers by this authorKuniaki Watanabe, Kuniaki Watanabe Biological Institute, Faculty of General Education, Kobe University, Kobe 657, JapanSearch for more papers by this author Tetsukazu Yahara, Tetsukazu Yahara Botanical Gardens, Faculty of Science, University of Tokyo, 1842 Hanaishi-cho, Nikko, 321-14 JapanSearch for more papers by this authorTakayuki Kawahara, Takayuki Kawahara Botanical Gardens, Faculty of Science, University of Tokyo, 1842 Hanaishi-cho, Nikko, 321-14 JapanSearch for more papers by this authorDaniel J. Crawford, Daniel J. Crawford Department of Botany, The Ohio State University, Columbus, Ohio, 43210-1293Search for more papers by this authorMotomi Ito, Motomi Ito Makino Herbarium, Tokyo Metropolitan University, 2-1-1 Fukazawa, Tokyo 158, JapanSearch for more papers by this authorKuniaki Watanabe, Kuniaki Watanabe Biological Institute, Faculty of General Education, Kobe University, Kobe 657, JapanSearch for more papers by this author First published: 01 August 1989 https://doi.org/10.1002/j.1537-2197.1989.tb15104.xCitations: 15AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Abstract An electrophoretic study of isozyme number for seven soluble enzymes revealed extensive gene duplications in eight diploid species of American Eupatorium belonging to three morphological groups. The enzymes isocitrate dehydrogenase, phosphoglucomutase, phosphoglucose isomerase, 6-phosphogluconate dehydrogenase, and shikimate dehydrogenase occur as three to six isozymes in all species, whereas the minimal conserved number typical of diploid plants is two isozymes for each. Fructose 1, 6-biphosphate aldolase is expressed as multibanded pattern suggesting fixed heterozygosity in all examined species. It was not possible to document gene duplication for triosephosphate isomerase from the electrophoretic patterns. All species examined have a chromosome number of 2n = 20, which has been regarded as the basic diploid number for Eupatorium. However, the detection of extensive duplications suggests that 2n = 10 may be the original diploid chromosome number in Eupatorium and that plants with 2n = 20 are of polyploid origin. This hypothesis would mean that extensive duplications at isozyme gene loci have been maintained since the origin of the genus, despite chromosomal diploidization having occurred. Citing Literature Volume76, Issue8August 1989Pages 1247-1253 RelatedInformation