| Project/Area Number |
05640780
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
系統・分類
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| Research Institution | Shinshu university |
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Principal Investigator |
SUGAWARA Takashi Shinshu university, Faculty of Liberal Arts, Associate Professor, 教養部, 助教授 (10226425)
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| Project Period (FY) |
1993 – 1994
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| Project Status |
Completed (Fiscal Year 1994)
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| Budget Amount *help |
¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1994: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1993: ¥700,000 (Direct Cost: ¥700,000)
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| Keywords | Asarum / Asarum takaoi / Asarum takaoi var.hisauchii / Biosystematics / Geographical variation / Taxonomy |
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| Research Abstract |
A total of 38 population samples of Asarum takaoi F.Maekawa sensu lato (includ.var.hisauchii F.Maekawa) distributed in Japan were examined for several floral and karyological characters to clarify the present status of morphological variation. Results of the present investigations indicated that the Chojahara population located in Hiroshima Prefecture is distinct from the other populations in chromosome number (2n=36, triploid) and in size of stamens. Populations from the south of Nagano Prefecture and from the west of Shizuoka Prefecture are clearly distinguishable from the populations adjacent to those area by the flowering season : the former usually open flowers in October, while the latter in February to March. However, no significant difference is found in floral morphologies among those populations. Although the populations from Kiso district have been taxonomically treated as var. hisauchii in shape and size of leaves, these leaf characters considerably vary within a population and are not useful as a diagnostic character. Thefore, the populations in the Kiso district appear to fall in the range of var. takaoi. In contrast, the populations in Iida-shi and its adjacent area are characterized by having a shorter stylar protuberance and a relatively shorter calyx-lobe.
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