Skip to Main Content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Home > Search > Publication Information

  1. Share via EmailShare on FacebookShare on LinkedInShare on Twitter
    Dislike this pubLike this pub
    Author(s): Nathan Havill; Anthony Cognato; Ek del-Val; Robert Rabaglia; Ryan C. Garrick
    Date: 2019
    Source: Insect Systematics and Diversity
    Publication Series: Scientific Journal (JRNL)
    Station: Northern Research Station
    PDF: Download Publication  (459.0 KB)

    Description

    Southern pine beetle, Dendroctonus frontalis Zimmermann, is a major native pest of pine trees in the southeastern United States, Mexico, and Central America. The species' range has recently expanded north for the first time in recorded history. Accordingly, information about the timing of population divergence and past geographic range occupancy may provide an important yardstick for understanding rapid range expansions. Using 16 new and eight existing microsatellite loci, together with mitochondrial (COI) and nuclear (EF-1α and 28S) DNA sequence data, we characterized broad-scale patterns of genetic variation in D. frontalis, and estimated divergence times for the entire D. frontalis species complex. Molecular dating suggested a middle Miocene (ca. 12 million years ago [Mya]) origin of the D. frontalis species complex, and an early Pleistocene (ca. 2.2 Mya) divergence between eastern and western D. frontalis populations that are separated by the Tamaulipan mezquital ecoregion in southern Texas and northeastern Mexico. In the western D. frontalis group, there was additional differentiation between populations from Michoacán versus Arizona, suggesting that additional genetic structure could be uncovered in this region. In the eastern group, there was high genetic diversity, but little structure. There was no pattern of isolation by distance, and only weak population differentiation that distinguished populations from Georgia and Florida from the other eastern populations. Overall, our results suggest that eastern D. frontalis originated as a distinct group well before the last glacial period, but additional markers may be necessary to fully describe its contemporary rapid range expansion.

    Publication Notes

    • Check the Northern Research Station web site to request a printed copy of this publication.
    • Our on-line publications are scanned and captured using Adobe Acrobat.
    • During the capture process some typographical errors may occur.
    • Please contact Sharon Hobrla, shobrla@fs.fed.us if you notice any errors which make this publication unusable.
    • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Havill, Nathan P; Cognato, Anthony I; del-Val, Ek; Rabaglia, Robert J; Garrick, Ryan C. 2019. New Molecular Tools for Dendroctonus frontalis (Coleoptera: Curculionidae: Scolytinae) Reveal an East–West Genetic Subdivision of Early Pleistocene Origin. Insect Systematics and Diversity. 3(2): 817-. https://doi.org/10.1093/isd/ixz002.

    Cited

    Google Scholar

    Keywords

    southern pine beetle, DNA sequence, genetic diversity, microsatellite, population genetics

    Related Search


    XML: View XML
Show More
Show Fewer
Jump to Top of Page
https://www.fs.usda.gov/treesearch/pubs/57956