2012 Fiscal Year Final Research Report
Estimates of the biodiversity based on the ubiquitous monitoring / genotyping of the rare plants around the lakeshore of Lake Biwa.
| Project/Area Number |
21310152
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Resource conservation science
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| Research Institution | Lake Biwa Environmental Research Institute |
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Principal Investigator |
KANEKO Yuko 滋賀県琵琶湖環境科学研究センター, 総合解析部門, 専門研究員 (90280817)
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| Co-Investigator(Kenkyū-buntansha) |
SETOGUCHI Hiroaki 京都大学, 大学院・人間・環境学研究科, 教授 (70206647)
TAKADA Takenori 北海道大学, 大学院・地球環境科学研究院, 教授 (80206755)
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| Project Period (FY) |
2009 – 2012
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| Keywords | 生物多様性保全 / レッドリスト / 植物 / 遺伝構造 / 絶滅確率 |
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| Research Abstract |
We investigated the genetic structure of Lake Biwa populations of (i) Lathyrus japonicus, (ii)Vitex rotundifolia, (iii) Euphorbia adenochlora and (iV) Carex vesicaria in Japan, using newly developed microsatellite loci and chloroplast DNA haplotypes. The genetic diversity was significantly lower in the inland (Lake Biwa) populations than coastal ones in the two beach species (i and ii). In addition, STRUCTURE and phylogenetic analyses supported robust genetic differentiation between the inland-coastal populations. Thus, Lake Biwa’s populations might have experienced a founder effect during the initial migration to Lake Biwa and genetic drift during inland isolation. The genetic diversity of the Lake Biwa populations of the two floodplain plants (iii and iv) was also low, showing that numbers of genets were smaller than that of ramets. We collected 425 papers of 12 Red list species, which we focused on this project, to obtain the information on their life history and reproductive property. Furthermore, we developed a computer simulation program in which fecundity strongly depends on genetic structure of the population. It enables us to quantify the relationship between the population genetic structure and extinction probability due to inbreeding depression.
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Research Products
(22 results)
