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Population structure of Phthorimaea operculella (Lepidoptera: Gelechiidae) in the United States.

Authors
  • Medina, R F
  • Rondon, S I
  • Reyna, S M
  • Dickey, A M
Type
Published Article
Journal
Environmental Entomology
Publisher
Oxford University Press
Publication Date
Jun 01, 2010
Volume
39
Issue
3
Pages
1037–1042
Identifiers
DOI: 10.1603/EN09286
PMID: 20550820
Source
Medline
License
Unknown

Abstract

The potato tuberworm, Phthorimaea operculella Zeller, is one of the most damaging pests of potatoes worldwide. Although tuberworm was recorded in California as early as 1856, it was first reported in damaging numbers in Oregon and Washington in the early 2000s. The objective of this study was to provide baseline information on the population structure of potato tuberworm in the United States. Potato tuberworm adults were collected from potato fields in the major production regions in the United States. Amplified fragment length polymorphisms (AFLP) were used to determine the genetic population structure of potato tuberworm. We used 219 individuals and 335 polymorphic AFLP bands to infer the geographic population structure of potato tuberworm. Posterior probabilities calculated using the model-based clustering method implemented in STRUCTURE, and F(st) values calculated using AFLP-SURV confirmed the existence of two distinct populations in the United States (one mostly associated to the western United States and the other one mostly associated to the eastern United States). This study provides baseline data for the molecular characterization of potato tuberworm populations, which will aid in tracking the origin of future invasions within the United States.

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