| Budget Amount *help |
¥16,900,000 (Direct Cost: ¥13,000,000、Indirect Cost: ¥3,900,000)
Fiscal Year 2019: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2018: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2017: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2016: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
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| Outline of Final Research Achievements |
In order to explore the mechanism of speciation via mechanical reproductive isolation, we performed ecological, evolutionary and developmental studies using Ohomopterus ground beetles that possess species-specific genital morphologies. Sexually antagonistic selection was revealed to operate in male and female genitalia, resulting in coevolutionary diversification between sexes. Difference in genital morphology increased at the secondary contact of species, suggesting reproductive character displacement driven by reinforcing selection. Additionally, this process generated further geographical variation in genital morphology within species and resulted in incipient speciation. Morphogenetic processes of male and female genitalia were described, thereby the developmental basis of genital diversification was inferred.
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