Gene flow among <i>Tetranychus urticae</i> (Acari: Tetranychidae) populations in Greece

Tsagkarakou, Anastasia; Navajas, María; Papaioannou-Souliotis, P.; Pasteur, Nicole

doi:10.1046/j.1365-294x.1998.00305.x

Cited by 54 publications

(25 citation statements)

References 34 publications

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“…In addition, breeding colonies that were initially isolated become connected by increased population density (Hinomoto and Takafuji 1995;Uesugi et al 2009). Such a relationship between genetic differentiation and population density has been observed in confined greenhouse environments (Hinomoto and Takafuji 1994;Tsagkarakou et al 1997Tsagkarakou et al , 1998Tsagkarakou et al , 1999Navajas et al 2002). Our data showed that the heterozygote deficiency within an individual tree was lower at site B, which was characterized by much more overall mite damage.…”

Section: Discussionsupporting

confidence: 77%

Evidence of a high level of gene flow among apple trees in Tetranychus urticae

2009

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The dispersal mechanism of the two-spotted spider mite Tetranychus urticae Koch (Acari: Tetranychidae) could affect predator-prey population dynamics and the spread of acaricide resistance. To investigate the propensity for spider mite migration in the field, the genetic structure of spider mite populations was studied in two apple orchards using five microsatellite markers. Adult female mites were collected from trees separated by approximately 10-24 m along a line covering a distance of about 100 m. The genetic data suggested that a high population density increased the migration rate among the breeding colonies within a single tree. Spatial autocorrelation analysis suggested a positive genetic structure in the first distance class within the two orchards, which might have been caused by crawling or short-distance aerial dispersal. Meanwhile, mites may also have a large-scale migration system that could cause a high level of gene flow and constrained isolation-by-distance or genetic clines within the approximately 100-m range of the study sites. Therefore, mites might aerially disperse over long distances on a scale of <100 m while also taking shorter trips among nearby trees within a distance of 10-24 m in the apple orchards.

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Section: Discussionsupporting

confidence: 77%

Evidence of a high level of gene flow among apple trees in Tetranychus urticae

2009

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“…In an experimental study where two strains of T. urticae homozygous for different Pgi alleles were introduced in a strawberry greenhouse, Hinomoto & Takafuji (1994) showed that the genetic differentiation within the population was negatively correlated with population density. Similarly, density was detected as the factor determining the homogenization of populations of T. urticae in open fields (Tsagkarakou et al. , 1998).…”

Section: Discussionmentioning

confidence: 99%

Genetic structure of a greenhouse population of the spider miteTetranychus urticae: spatio‐temporal analysis with microsatellite markers

Navajas

Perrot‐Minnot

Lagnel

et al. 2002

Insect Molecular Biology

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The genetic structure of a greenhouse population of the mite Tetranychus urticae was studied by the analysis of five microsatellite loci. Genetic variation was compared during a crop season between periods of population foundation and rapid population increase and was investigated in two consecutive years. The population displayed significant heterozygote deficiency at all the sampling periods. However, inbreeding tended to decrease with increasing density (FIS coefficient between 0.13 and 0.25). No significant genetic differentiation between samples was found either at a spatial scale within the greenhouse or at a temporal scale between two growing seasons (FST between 0.008 and 0.09). Estimations of the genetic relatedness between pairs of individuals indicated that the distances between pairs of sisters and unrelated mites in the greenhouse were not significantly different, suggesting that mites do not tend to form patches that reside close to the point of birth.

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“…Females oviposit where they feed, move little; and the emerging juveniles stay very near to where they developed, given highly inbred populations resulting by sib-matings. When migration is low or absent and when mite density is reduced, mites in such small colonies are highly inbred (Hinomoto and Takafuji 1995;Tsagkarakou et al 1997Tsagkarakou et al , 1998Navajas et al 2002).…”

Section: Genetic Variation and Inbreedingmentioning

confidence: 99%

Microsatellite markers reveal spatial genetic structure of Tetranychus urticae (Acari: Tetranychidae) populations along a latitudinal gradient in Europe

et al. 2007

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The genetic structure of populations of the two-spotted spider mite Tetranychus urticae was investigated along a south-north European transect spanning from southern France to The Netherlands. Mites were collected on Urtica dioica in 6 sampling zones. Microsatellite variation at 5 loci revealed considerable genetic variation with an average heterozygozity of 0.49. Significant heterozygote deficiency was found in 7 populations out of the 18 samples analyzed and one of them was completely monomorphic. Tetranychus urticae populations show some level of genetic structuring. First, genetic differentiation between localities (F (ST) estimates) was significant for all comparisons. Second, the analysis of molecular variance, AMOVA, indicates that there is an effect, albeit low (9%), of the locality in accounting for allele frequency variance. Geographic distance emerges as a factor responsible for this genetic structure. The results are discussed in relation to the biological features of the species and the known patterns of migration. Related agronomical issues are addressed.

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Gene flow among Tetranychus urticae (Acari: Tetranychidae) populations in Greece

Cited by 54 publications

References 34 publications

Evidence of a high level of gene flow among apple trees in Tetranychus urticae

Evidence of a high level of gene flow among apple trees in Tetranychus urticae

Genetic structure of a greenhouse population of the spider miteTetranychus urticae: spatio‐temporal analysis with microsatellite markers

Microsatellite markers reveal spatial genetic structure of Tetranychus urticae (Acari: Tetranychidae) populations along a latitudinal gradient in Europe

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