Karyotype evolution on Euphorbiaceae (s.l.) using young leaves

2004 Fiscal Year Final Research Report Summary

• Project/Area Number: 15570084
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Biodiversity/Systematics
• Research Institution: Kochi Women's University
• Principal Investigator: OGINUMA Kazuo Kochi Women's University, Department of Environmental Science, Faculty of Human Life & Environmental Science, Professor, 生活科学部, 教授 (30106794)
• Co-Investigator(Kenkyū-buntansha): TOBE Hiroshi Kyoto University, Department of Botany, Graduate School of Science, Professor, 大学院・理学研究科, 教授 (60089604)
• Project Period (FY): 2003 – 2004
• Keywords: Karyotype / Chromosomes / Evolution / Euphorbiaceae

Research Abstract

Euphorbiaceae comprise more than 200 genera and three subfamilies of Acalyphoideae, Euphorbioideae and Crotonoideae. We have observed chromosomes of 40 species in 37 genera. Among 37 genera, chromosomes of the following 13 genera were observed for the first time in this study: Adelia (2n=40), Agrostistachs (2n=22), Blumerodendron (2n=22), Chaetocarpus (2n=36), Elateriospermum (2n=36), Koilodepas (2n=24), Neoscortechinia (2n=24), Omphalea (2n=32), Strophioblachia (2n=20), Sumbviopsis (2n=22), Pimeleodendron (2n=22), Strophioblacia (2n=20) and Trigonostemon (2n=26). Additionally, revised new chromosome numbers have counted here in the following five species of five genera: Alchornea (2n=72), Codiaeum (2n=128), Dalechampia (2n=88), Homalanthus (2n=154) and Tragia (2n=42).
Among the families related to Euphorbiaceae in Malpigiales, we have observed chromosomes of 30 species of 27 genera in 14 families. Of 27 genera, chromosomes of seven genera of Breynia (2n=52) in Phyllanthaceae, Irvingia (2n=30) in Irvingiaceae, Ixonanthes (2n=28) in Ixonanthaceae, Lacistema (2n=44) in Lacistemaceae, Microdesmis (2n=30) in Pandaceae and Picrodendron (2n=44) in Picrodendraceae were observed for the first time in this study. The revised new chromosome numbers have been ocounted here in the following five genera: Adenia (2n=22) in Passifloraceae, Casearia (2n=22) in Salicaceae, Heteropteris (2n=20) in Malpigiaceae, Ochna (2n=50) in Ochnaceae and Stigmaphyllon in Malpigiaceae. In the present study, we have observed chromosomes of 70 species of 64 genera in 14 families of Malpigiales. Among them, we have observed chromosomes of 20 species of 19 genera in six families for the first time in this study.