Genetic structure and dispersal patterns of the invasive psocid Liposcelis decolor (Pearman) in Australian grain storage systems

Katarina Mikac, Nancy FitzSimmons

    Research output: Contribution to journalArticle

    12 Citations (Scopus)

    Abstract

    Microsatellite markers were used to investigate the genetic structure among invasive L. decolor populations from Australia and a single international population from Kansas, USA to determine patterns of dispersal. Six variable microsatellites displayed an average of 2.5–4.2 alleles per locus per population. Observed (HO) heterozygosity ranged from 0.12–0.65 per locus within populations; but, in 13 of 36 tests, HO was less than expected. Despite low levels of allelic diversity, genetic structure estimated as h was significant for all pairwise comparisons between populations (h = 0.05–0.23). Due to suspected null alleles at four loci, ENA (excluding null alleles) corrected FST estimates were calculated overall and for pairwise population comparisons. The ENA-corrected FST values (0.02–0.10) revealed significant overall genetic structure, but none of the pairwise values were significantly different from zero. A Mantel test of isolation by distance indicated no relationship between genetic structure and geographic distance among all populations (r2 = 0.12, P = 0.18) and for Australian populations only (r2 = 0.19, P = 0.44), suggesting that IBD does not describe the pattern of gene flow among populations. This study supports a hypothesis of long distance dispersal by L. decolor at moderate to potentially high levels.
    Original languageEnglish
    Pages (from-to)521-527
    Number of pages7
    JournalBulletin of Entomological Research
    Volume100
    Issue number5
    DOIs
    Publication statusPublished - 2010

    Fingerprint

    Psocodea
    Genetic Structures
    Population
    null alleles
    Alleles
    Microsatellite Repeats
    loci
    microsatellite repeats
    Liposcelis decolor
    Gene Flow
    gene flow
    heterozygosity
    testing
    alleles
    genetic variation

    Cite this

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    title = "Genetic structure and dispersal patterns of the invasive psocid Liposcelis decolor (Pearman) in Australian grain storage systems",
    abstract = "Microsatellite markers were used to investigate the genetic structure among invasive L. decolor populations from Australia and a single international population from Kansas, USA to determine patterns of dispersal. Six variable microsatellites displayed an average of 2.5–4.2 alleles per locus per population. Observed (HO) heterozygosity ranged from 0.12–0.65 per locus within populations; but, in 13 of 36 tests, HO was less than expected. Despite low levels of allelic diversity, genetic structure estimated as h was significant for all pairwise comparisons between populations (h = 0.05–0.23). Due to suspected null alleles at four loci, ENA (excluding null alleles) corrected FST estimates were calculated overall and for pairwise population comparisons. The ENA-corrected FST values (0.02–0.10) revealed significant overall genetic structure, but none of the pairwise values were significantly different from zero. A Mantel test of isolation by distance indicated no relationship between genetic structure and geographic distance among all populations (r2 = 0.12, P = 0.18) and for Australian populations only (r2 = 0.19, P = 0.44), suggesting that IBD does not describe the pattern of gene flow among populations. This study supports a hypothesis of long distance dispersal by L. decolor at moderate to potentially high levels.",
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    Genetic structure and dispersal patterns of the invasive psocid Liposcelis decolor (Pearman) in Australian grain storage systems. / Mikac, Katarina; FitzSimmons, Nancy.

    In: Bulletin of Entomological Research, Vol. 100, No. 5, 2010, p. 521-527.

    Research output: Contribution to journalArticle

    TY - JOUR

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    AU - Mikac, Katarina

    AU - FitzSimmons, Nancy

    PY - 2010

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    AB - Microsatellite markers were used to investigate the genetic structure among invasive L. decolor populations from Australia and a single international population from Kansas, USA to determine patterns of dispersal. Six variable microsatellites displayed an average of 2.5–4.2 alleles per locus per population. Observed (HO) heterozygosity ranged from 0.12–0.65 per locus within populations; but, in 13 of 36 tests, HO was less than expected. Despite low levels of allelic diversity, genetic structure estimated as h was significant for all pairwise comparisons between populations (h = 0.05–0.23). Due to suspected null alleles at four loci, ENA (excluding null alleles) corrected FST estimates were calculated overall and for pairwise population comparisons. The ENA-corrected FST values (0.02–0.10) revealed significant overall genetic structure, but none of the pairwise values were significantly different from zero. A Mantel test of isolation by distance indicated no relationship between genetic structure and geographic distance among all populations (r2 = 0.12, P = 0.18) and for Australian populations only (r2 = 0.19, P = 0.44), suggesting that IBD does not describe the pattern of gene flow among populations. This study supports a hypothesis of long distance dispersal by L. decolor at moderate to potentially high levels.

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