Survey of the genetic diversity of Phormia regina (Diptera: Calliphoridae) Using amplified fragment length polymorphisms

  • Picard C
  • Wells J
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There is very little information concerning carrion ßy population genetic structure.We generatedampliÞedfragment lengthpolymorphism(AFLP)proÞles for thecommonblowßy,Phormia regina (Meigen), from sites spanning the contiguous United States. Analysis of molecular variance (AMOVA) based on 232 loci found signiÞcant variation (?SC ?23%) among discrete samples (those collected at a bait in one location over a short period of time). Samples collected in the same location but at different times were also distinct. When samples were pooled into geographic regions (east, central, west), the variation was negligible (?CT ? 0%). A Mantel test found only a very weak correlation between individual genetic and geographic distances. Relative relatedness coefÞcients based on shared allele proportions indicated individual samples were likely to contain close relatives. P. regina arriving at an individual carcass typically represent a nonrandom sample of the population despite a lack of geographic structure. A female blow ßy produces hundreds of offspring at one time; therefore, newly emerged siblings may respond in concert to an odor plume. These results may be of interest to forensic entomologists, many of whom use a laboratory colony founded from a small sample for the growth studies that support casework. Discrepancies between published growth curves may reßect such random differences in the founding individuals

Author-supplied keywords

  • blow fly
  • forensic entomology
  • genetic assignment
  • genotype
  • inbreeding

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  • Christine J. Picard

  • Jeffrey D. Wells

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