Ecological genetics and socioecological studies for the conservation of wild three-leaved azalea

野生三叶杜鹃保护的生态遗传学和社会生态学研究

• 批准号: 14560111
• 负责人: KOBAYASHI Tatsuaki
• 金额: $ 1.86万
• 依托单位: Chiba University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14560111/
• 关键词: Rhododendron dilatatum; Rhododendron kiyosumense; Wild hunt; Conservation ecology; Rural nature; Ecological genetics; Introgressive hybridization; 浸透交雑; 山取り; 雑種形成; 種内変異

The changes of distribution of three-leaved azalea were studied through the interview and field survey. The past wide distribution was shrinked in the mountain area. Transplanting from native habitat was boomed since 1970 to 1985, when the rural life style was quite changed by the reduce of charcoal production and the development of reservoir and road network. The demand of three-leaved azalea as garden plant was increased and stolen from natural habitat.Since the late 80's, the commercial production was started and the value of natural sapling was decreased. The transplanting from habitat was consequently reduced.Three leaved azalea grows on the tertiary zone with sand stone and mud stone. The natural habitat of Rhododendron dilatatum was steep with thin soil-layer. That of Rhododendron kiyosumense was covered with thick soil and tree layer was developed. The saplings of Rhododendron dilatatum was few due to the reduction of safe site for establishment, because the stop of coppice management.The hybridization of two species was compared between the natural habitat and the rural garden. 8% of individuals showed intermediate properties in natural habitat. 27% of individuals showed intermediate properties in garden. Natural hybridization was confirmed through gene analysis. Hybridization of these species should occur often in the garden, where the plants were mixed-grown with high density.

通过访谈和实地调查，研究了三叶杜鹃分布的变化。在山区，过去广泛分布的范围缩小了。从1970年到1985年，随着木炭生产的减少以及水库和道路网的发展，农村生活方式发生了很大变化。80年代后期开始商业化生产，自然苗木价值下降。三叶杜鹃生长在第三系砂岩、泥岩带。杜鹃花的自然生境是陡峭的，土层较薄。高山杜鹃林下土壤覆盖较厚，乔木层发达。由于人工林经营的停止，使得安全造林地减少，使得杜鹃花的幼树数量减少，比较了两种杜鹃花在自然生境和乡村园林中的杂交效果。8%的个体在自然栖息地表现出中间属性。27%的个体在园林中表现出中间性。通过基因分析证实了天然杂交。这些物种的杂交应该经常发生在花园里，那里的植物混合生长的高密度。

项目成果

古賀陽子, 小林達明: "房総半島に自生するミツバツツジ節2種の市場動向と生産技術の確立に関する社会的背景"ランドスケープ研究. 67・5(印刷中). (2004)

古贺洋子、小林龙明：“房总半岛野生杜鹃花的市场动向及生产技术确立的社会背景”，《景观研究》67, 5（出版中）。

古賀陽子, 若木優子, 小林達明, 長谷川秀三: "房総半島に自生するミツバツツジ節2種の生育立地"ランドスケープ研究. 66・3. 1-7 (2003)

古贺洋子、若木裕子、小林龙明、长谷川英三：“房总半岛野生的两种杜鹃花的生长地点”景观研究66・3.1-7（2003）。

KOBAYASHI, Tatsuaki: "The proposal about the process of plant utilization in revegetation projects for the conservation of biodiversity"Jpn.J.Reveget.Tech.. 27. 481-491 (2002)

小林龙明：“关于保护生物多样性的再植被项目中植物利用过程的提案”Jpn.J.Reveget.Tech.. 27. 481-491 (2002)

KAMICHI, Tomoko, KOBAYASHI, Tatsuaki, NOMURA, Masafumi: "Interspecific compatibility in sect. Scadorhodion and their hybridizatrion in gardens"Jpn.J.Reveget.Tech.. 29. 91-94 (2003)

KAMICHI、Tomoko、KOBAYASHI、Tatsuaki、NOMURA、Masafumi：“Scadorhodion 组的种间兼容性及其在花园中的杂交”Jpn.J.Reveget.Tech.. 29. 91-94 (2003)

KOGA, Yoko, WAKAGI, Yuko, KOBAYASHI, Tatsuaki, HASEGAWA, Shuzo: "Habitat separation of Rhododendron dilatatum and Rhododendron kiyasumense in the Boso Peninsula"J.JILA. 66. 231-237 (2003)

KOGA、Yoko、WAKAGI、Yuko、KOBAYASHI、Tatsuaki、HASEGAWA、Shuzo：“房总半岛杜鹃花和 kiyasumense 的生境分离”J.JILA。