Spatial and temporal genetic variability in French populations of the peach-potato aphid, Myzus persicae

Article Abstract:

The genetic variability at seven microsatellite loci of Myzus persicae exhibiting both parthenogenesis and sexual reproduction modes shows that breeding system affects genotypic varaiability as indicated by more varaiability among cyclically parthenogenetic aphids than their obligately parthenogenetic counterparts. Such differences in the population structure indicate migration accompanies with the change of host during sexual reproduction and lowers the level of population differentiation.

Animal reproduction, Aphididae, Aphids

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Nuclear and chloroplast genetic structure indicate fine-scale spatial dynamics in a neotropical tree population

Article Abstract:

Comparative analysis of generational and spatial genetic structure of Dicorynia guianensis canopy tree indicates a strong link between demographic and genetic spatial structures within small distances. Data show that genetic differentiation is significant between spatial aggregates than between cohorts. Furthermore, chloroplast markers exhibit larger spatial autocorrelation than nuclear markers.

Usage, Trees, Trees (Plants), Spatial analysis (Statistics), Genetic discrimination, Gene frequency

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Does insecticide resistance alone account for the low genetic variability of asexually reproducing populations of the peach-potato aphid Myzus persicae?

Article Abstract:

The acquisition of insecticide resistance genes for large areas, combined with the absence or rarity of sexual recombination, led to the low genetic variability in the Myzus persicae in a wide geographical scale. The study suggests that human-induced selective pressures probably shape the genetic structure of Myzus persicae populations living on oilseed rape.

Esterases, Evolution (Biology), Evolution, Genetic research, Insecticide resistance

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