Phenotypic plasticity in host choice behavior in black bean aphid, Aphis fabae (Homoptera: Aphididae) |
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Authors: | G Gorur C Lomonaco A Mackenzie |
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Institution: | 1. Nigde üniversitesi, Fen-Edebiyat Fakültesi, Biyoloji B?lümü, 51100, Nigde, Turkey 2. Instituto de Biologia, Universidade Federal de Uberlandia, Minas Gerais, Brazil 3. Department of Biology, University of Essex, C04 3SQ, Colchester, UK
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Abstract: | The study of phenotypic plasticity in host choice behavior is crucial to predict evolutionary patterns of insect–plant interactions.
The presence of sufficient variation in plasticity may facilitate host race formation and sympatric speciation. In this study,
13 Aphis fabae Scopoli genotypes reared both on broad bean and nasturtium exhibited statistically significant genotypic variability in host
selection behavior. Some genotypes displayed increase in preference and acceptance in a novel host plant through generations.
There are also strong conditioning effects of nasturtium as nasturtium reared genotypes are more willing to choose nasturtium
over broad bean while broad bean reared genotypes do not show differences in choosing between the two host plants. There are
also positive relationships between fitness and host choice behavior particularly for nasturtium. Results of the study supported
the hypothesis that phenotypic plasticity in host choice behavior may be one of the major determinants of the evolutionary
trajectory of a parasitic species, such as aphids. |
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Keywords: | Aphid Host selection Phenotypic plasticity Speciation |
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