| Project/Area Number |
22570215
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Evolutionary biology
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| Research Institution | Kyushu University |
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Principal Investigator |
TUDA Midori 九州大学, 大学院・農学研究院, 准教授 (20294910)
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| Co-Investigator(Kenkyū-buntansha) |
NAKAHIRA Kengo 九州大学, 大学院・農学研究院, 助教 (70596585)
YANAGI Shin-ichi 九州大学, 総合研究博物館, 専門研究員 (50532363)
YAMADA Naotaka 九州大学, 大学院・農学研究院, 助教 (20304769)
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| Co-Investigator(Renkei-kenkyūsha) |
SAEKI Yoriko 九州大学, 総合研究博物館, 学術研究員 (40646858)
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| Project Period (FY) |
2010 – 2012
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| Project Status |
Completed (Fiscal Year 2012)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2012: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2011: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2010: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Keywords | 昆虫 / 形態 / 多様性 / 遺伝 / 多型 / 進化 / 母性効果 / 系統進化 |
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| Research Abstract |
Mechanisms for development and maintenance in intrapopulation polymorphism of antennal segment number were studied in Callosobruchusbeetle species from both macroevolutionary and microevolutionary points of view. According to the reconstructed molecular phylogeny of the genus Callosobruchus, the antennal segment polymorphism independently evolved multiple times only in an African species clade. This indicates that phylogenetic effect contributed to the development of the polymorphism to some extent. Individuals with abnormal antennal segment number were selected. Mating among selection and control strains showed that having abnormal antenna was costly in females but beneficial in males. This result demonstrated for the first time that sexual conflict plays an important role in maintenance of polymorphism of not only often-reported ecological traits but also morphological traits.
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