Karyomorphology and Evolution in Juglandales: A Review.
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Accession number;00A0340657
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| Title;Karyomorphology and Evolution in Juglandales: A Review. |
| Author;
OGINUMA KAZUO
(Kochi Women's Univ., Fac. of Human Life and Environmental Sci.)
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Journal Title;Shokubutsu Bunrui, Chiri
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Journal Code:L2614A
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ISSN:0001-6799
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VOL.50;NO.2;PAGE.229-241(1999)
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| Figure&Table&Reference;FIG.11, TBL.3, REF.32 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;Karyomorphological features of Juglandaceae and Rhoipteleaceae, which have usually been placed together in Juglandales, were reviewed to discuss their evolution in Juglandales. Karyomorphology of Engelhardia serrata was reported here for the first time. By the present time, five of eight genera of Juglandaceae and the only genus Rhoiptelea of Rhoipteleaceae are know karyomorphologically. Based on available data, the two families are nearly consistent in karyomorphology, having x=16(except in Platycarya with x=15) and very similar karyotypes of metaphase chromosomes. Comparisons between and within the two families and related families(Myricaceae, Betulaceae, Ticodendraceae, and Casuarinaceae) indicate that Juglandales(predominantly with x=16) are of tetraploid origin from a common ancestor with Myricaceae(with x=8), Betulaceae, Ticodendraceae and Casuarinaceae, supporting close affinities between Juglandaceae and Rhoipteleaceae. The karyotypes further support the distincness of Rhoipteleaceae as well as a monophyly of Caryeae and Juglandaeae in Juglandaceae, but a study of Cyclocarya, Alfaroa, and Oreomunnea is required to fill up the information gap. Even at the present stage, however, karyomorphology which is very consistent within families and/or a group(s) of genera in the Juglandales in general, is very likely to provide reliable evidence for relationships in other groups related to the order. (author abst.) |
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