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Genetic diversity of the melon aphid Aphis gossypii (Hemiptera: Aphididae) in a diversified vegetable growing area

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Abstract

The melon aphid, Aphis gossypii Glover (Hemiptera: Aphididae), is a highly polyphagous species. To investigate its genetic diversity among seasonal host plants, we conducted a field study in a diversified vegetable growing area in Beijing, China. The molecular marker mtDNA COI (1563-bp long) was used to analyze the genetic diversity of aphid populations collected from eight plant species belonging to families Malvaceae, Cucurbitaceae and Rosaceae. A total of 33 haplotypes were identified, five of which were shared haplotypes, while the remaining 28 were unique haplotypes. At least one haplotype was shared by all eight A. gossypii populations. Aphid populations showed high levels of nucleotide and haplotype diversity. The genetic diversity indices were maximal on the hibiscus (the primary host), whereas minimal on cucumber and strawberry (the secondary hosts). The analysis of molecular variance showed that most of the variance was distributed within populations. Based on the genetic distances, the eight populations can be divided into two groups, associated with primary and the secondary host plant, respectively. The aphids possibly migrated from Hibiscus to watermelon, thereafter dispersed from watermelon to other secondary host plants. Watermelon was an important host probably due to its early growing season and large planting area. Our results highlighted the need to target the population dispersal for effective control.

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Acknowledgements

We thank Accdon (www.accdon.com) for its linguistic assistance during the preparation of this manuscript. This study was supported by National Natural Science Foundation of China (No. 31501646), Foundation for the Talents by the Beijing municipal (2014000020124G080), and Scientific Research Project of Beijing Municipal Education Commission (KM201710020006).

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Correspondence to Zhiyong Zhang.

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Dong, Z., Li, Y., Liu, S. et al. Genetic diversity of the melon aphid Aphis gossypii (Hemiptera: Aphididae) in a diversified vegetable growing area. Appl Entomol Zool 53, 259–266 (2018). https://doi.org/10.1007/s13355-018-0552-1

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  • DOI: https://doi.org/10.1007/s13355-018-0552-1

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