2009 Fiscal Year Final Research Report
Eco-physiological study on phase polyphenism in locusts
| Project/Area Number |
19380039
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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 |
Applied entomology
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| Research Institution | National Institute of Agrobiological Sciences |
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Principal Investigator |
TANAKA Seiji National Institute of Agrobiological Sciences, 昆虫-昆虫・植物間相互作用研究ユニット, 上級研究員 (50370664)
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| Project Period (FY) |
2007 – 2009
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| Keywords | トノサマバッタ / サバクトビバッタ / 相変異 / 大発生 / 昆虫 |
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| Research Abstract |
The migratory locust, Locusta migratoria, displays phase polyphenism in which various morphological, physiological, biochemical and behavioral traits vary continuously in response to population density. The present study examined the transgenerational transmission of crowding stimuli by looking at morphological and behavioral traits of hatchlings. It was found that the rearing density in the parental generation affected hatchling body size of the progeny, which showed a significant correlation with a phase-dependent morphometric trait at the adult stage in the progeny generation. In the desert locust, Schistocerca gregaria, a similar phenomenon was observed with some differences. The present study has revealed that population density in both parental and progeny generations plays an important role in the control of phase-dependent morphological and behavioral traits in locusts.
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