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Population Genetics of Soybean Aphid: Elaborating Species Specific SNPs to test Bottleneck and Migration Hypotheses across North-central US and Canada

Year: 2011
Type: article
Abstract: Since its introduction in 2000 to North America, the soybean aphid (Aphis glycines) has spread across much of the U.S. and Canadian soybean growing regions, and has become one of the most damaging insect pests of this crop.Such rapid and largescale pattern suggests that A. glycines has high rates of adaptability and dispersal.These trends have been linked to the effect of host transition, and the ability of aphid populations to clone and migrate across soybean fields during summer.The soybean aphid is a holocyclic insect that alternates between two hosts: (1) buckthorn, where sexual reproduction, oviposition and overwintering occur; and (2) soybean, where clonal reproduction and large-scale migration occur.We conducted a study using eight North American locations where aphids were collected twice, early and late in the soybean season.To analyze the genetic structure of the sampled populations, we used six microsatellite markers, and developed and validated twenty-four Single Nucleotide Polymorphic markers.These markers are, to my knowledge, the first SNPs to be validated for soybean aphid.The objective for the study was to analyze the genetic structure of soybean aphid populations during the transition from buckthorn to soybean in spring, and the progressive changes in the genetics of these populations after clonal reproduction and migration.The hypotheses from the study were that (1) soybean aphids go through population bottlenecks that differentiate population at the beginning of the season, and (2) there is a large-scale dispersion of aphids across soybean fields once the aphids have reached a population outbreak.Results from the study showed strong
Language: English
Subfield: Genetics
Open Access status: green
OpenAlex ID: W2658510225
FWCI:
Cites: 7
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Related to: 10