Study on the scientific reference based on the aquatic plants of Nymphoides peltata

2017 Fiscal Year Final Research Report

• Project/Area Number: 26281051
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Environmental and ecological symbiosis
• Research Institution: University of Human Environments
• Principal Investigator: Fujii Shinji 人間環境大学, 人間環境学部, 准教授 (40228945)
• Co-Investigator(Kenkyū-buntansha): 牧 雅之 東北大学, 学術資源研究公開センター, 教授 (60263985) ; 山室 真澄 東京大学, 大学院新領域創成科学研究科, 教授 (80344208)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Keywords: アサザ / 遺伝的変異 / 保全 / リファレンス / 地理的変異 / 集団内変異 / 琵琶湖 / 霞ヶ浦

Outline of Final Research Achievements

Genetic diversity of Nymphoides peltata, an aquatic plant widely distributed in Japan except Hokkaido, was very low and had no geographical structure of genetic variation. Each of the two populations of Notogawa in Lake Biwa and Tomitahama in Lake Kasumigaura possessed the greater part of the genetic diversity in Japan. In the view point of complimentary, conserving one of the two populations above with a population in Kahokugata or a population in Saga Plain could be effective for keeping the genetic diversity. In Lake Kasumigaura, only small area of the communities of floating plants was found based on the photos taken by US army in 1947. Nymphoides peltata grows on the wet land habitats both natural and cultivated and supposed to greatly change its growing places and distribution ranges in short period under the human activities.

Free Research Field

植物分類学