2009 Fiscal Year Final Research Report
Speciation in phytophagous insects : Assessment of manifold effects of host change on reproductive isolation
| Project/Area Number |
18207005
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Biodiversity/Systematics
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| Research Institution | Hokkaido University |
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Principal Investigator |
KATAKURA Haruo Hokkaido University, 大学院・理学研究院, 教授 (40113542)
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| Co-Investigator(Kenkyū-buntansha) |
AOTSUKA Tadashi 首都大学東京, 大学院・理工学研究科, 教授 (40106604)
NAKANO Susumu 広島修道大学, 人間環境学部, 教授 (70237337)
FUJIYAMA Naoyuki 北海道教育大学, 教育学部, 准教授 (90360958)
KATOH Toru 北海道大学, 大学院・理学研究院, 助教 (80374198)
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| Project Period (FY) |
2006 – 2009
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| Keywords | マダラテントウ類 / ハムシ類 / 生態的種分化 / DNA解析 / 生殖隔離 / 寄種特異性 / 食草利用 / 東・東南アジア |
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| Research Abstract |
Effects of host change on the reproductive isolation of phytophagous specialists were studied using phytophagous ladybird beetles and leaf beetles. Host shift has resulted in nearly complete reproductive isolation between two pairs of specialist species/populations by ecological isolation. In addition, in temperate regions, phenological differences between two potential host plants affected oviposition and/or diapause schedules of phytophages. Examples were also given for parallel host shift, rapid host shift, beetle plasticity in ability to utilize various potential host plants, and effects of host quality variation on the host selection of beetles.
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