Geographic variation of karyotypes involving circular overlaps in Japanese harvestmen (Arachnida: Opiliones) with their taxonomic revisions
| Project/Area Number |
17K07534
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Biodiversity/Systematics
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| Research Institution | Tottori University |
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Principal Investigator |
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| Project Period (FY) |
2017-04-01 – 2021-03-31
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| Project Status |
Completed (Fiscal Year 2020)
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| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Keywords | 地理的変異 / 染色体 / 交雑帯 / 環状重複 / 種分化 / ザトウムシ / 遺伝的浮動 / シカ害 / 形質弛緩 / 繁殖干渉 / 生物地理 / 地理的分化 / 核型分化 / 分子系統 / 系統分類 |
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| Outline of Final Research Achievements |
Harvestmen (Arachnida, Opiliones) are suitable animals to understand chromosomal speciation due to their enormous geographical diversity in the number of chromosomes and external morphology even in a single species. In this study, chromosomal data were accumulated for the unstudied areas for Gagrellula ferruginea, the Leiobunum curivipalpe-species group, and Nelima genufusca-species group, and so on. Nature of the several chromosomal hybrid zones have been also analysed. Population genomics surveyed for two thelytokous harvestmen, L. manubriatum and L. globosum revealed that their thelytoky was of facultative, and females of the species mate with two males on average in the wild.
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| Academic Significance and Societal Importance of the Research Achievements |
染色体種分化は1970-1980年代に種分化の1プロセスとして注目されたが，最近は研究があまり進展していない。1990年代以降，野外集団遺伝学に関心のある研究者の多くが解析手法として核型分析からDNAに移行したのが一因と考えられる。ザトウムシ類は染色体数の地理的分化がきわめて顕著な動物群であり，染色体情報なしには，別種か同種かの識別も困難であった。この研究ではこれまで未調査であった地域についても染色体情報を得たことにより，本類の分類学的整理の基礎を確立できた。また，染色体交雑帯でヘテロ接合核型が超優性を示す例をはじめて示した。産雌単為生殖の進化生物学的問題に新視点を提供できた.
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Report
(5 results)
Research Products
(50 results)
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[Journal Article] Distributions of a halophilous and a riparian species of harvestmen along Sendai River, Tottori City, with the first records of harvestmen in Tottori Sand Dunes2020
Author(s)
Tsurusaki, N., Kawaguchi, M., Funakura, Y., Matsumoto, T., & Obae, Y
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Journal Title
Acta Arahnologica,
Volume: 69
Pages: 95-103
NAID
Related Report
Peer Reviewed
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[Journal Article] A stable phylogenomic classification of Travunioidea (Arachnida, Opiliones, Laniatores) based on sequence capture of ultraconserved elements.2018
Author(s)
Derkarabetian, S., Starrett, J., Tsurusaki, N., Ubick, D., Castillo, S., Hedin, M.
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Journal Title
ZooKeys
Volume: 760
Pages: 1-36
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] A stable phylogenomic classification of Travunioidea (Arachnida, Opiliones, Laniatores) based on sequence capture of ultraconserved elements2018
Author(s)
Derkarabetian, S., Starrett, J., Tsurusaki, N., Ubick, D., Castillo, S., Hedin, M.
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Journal Title
ZooKeys（受理ずみ，印刷中）
Volume: -
Related Report
Peer Reviewed
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[Presentation] Phylogenomic analysis and revision of the Travunioidea (Opiliones, Laniatores) based on ultraconserved elements.2017
Author(s)
Derkarabetian, S., Starrett, J., Tsurusaki, N., Ubick, D. & M. Hedin
Organizer
41st Annual Meeting of The American Arachnological Society，July 24-28, 2017，Queretaro, Juriquilla Fernando Avarez Padilla
Related Report
Int'l Joint Research
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