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Do outbreaks affect genetic population structure? A worldwide survey in Locusta migratoria, a pest of plagued by microsatellite null alleles Inra
Chapuis, M.P.; Lecoq, M.; Michalakis, A.; Loiseau, A.; Sword, A.; Piry, S.; Estoup, A..
An understanding of the role of factors intrinsic to a species’ life history in structuring contemporary genetic variation is a fundamental, but understudied, aspect of evolutionary biology. Here, we assessed the influence of the propensity to outbreak in shaping worldwide genetic variation in Locusta migratoria, a cosmopolitan pest well known for its expression of density-dependent phase polyphenism. We scored 14 microsatellites in nine subspecies from 25 populations distributed over most of the species’ range in regions that vary in the historical frequency and extent of their outbreaks. We rejected the hypothesis that L. migratoria consists of two genetically distinct clusters adapted to habitats either rarely (nonoutbreaking) or cyclically...
Tipo: Journal Article Palavras-chave: CRIQUET MIGRATEUR COMPUTER SIMULATION; LIFE-HISTORY EVOLUTION; LOCUST; PHASE POLYPHENISM; SPATIAL DYNAMICS; SUBSPECIES.
Ano: 2008 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD201030b8d97e&uri=/notices/prodinra1/2010/12/
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Eight polymorphic microsatellite loci for the Australian plague locust, Chortoicetes terminifera Inra
Chapuis, M.P.; Popple, J.A.; Simpson, S.J.; Estoup, A.; Martin, J.F.; Steinbauer, M.; McCulloch, L.; Sword, G.A..
Few population genetics studies have been carried out on major locust species. In particular, an understanding of the population genetic structure of the Australian plague locust, Chortoicetes terminifera, is lacking. We isolated and characterized eight polymorphic microsatellite loci in C. terminifera, and described experimental conditions for polymerase chain reaction multiplexing and genotyping these loci. The number of alleles per locus ranged from 11 to 29 and the expected heterozygosity ranged from 0.797 to 0.977. One locus was found to be X-linked. Results of cross-taxon amplification tests are reported in four species of the Oedipodinae subfamily
Tipo: Journal Article Palavras-chave: CRIQUET PELERIN; ESPECE INVASIVE CHORTOICETES TERMINIFERA; LOCUST; MICROSATELLITES; NULL ALLELES; ORTHOPTERA; PEST.
Ano: 2008 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2009f0f82bce&uri=/notices/prodinra1/2010/02/
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Parental crowding influences life-history traits in Locusta migratoria females Inra
Chapuis, M.P.; Crespin, L.; Estoup, A.; Augé-Sabatier, A.; Foucart, A.; Lecoq, M.; Michalakis, Y..
Parental environments could play an important role in controlling insect outbreaks, provided they influence changes in physiological, developmental or behavioural life-history traits related to fluctuations in population density. However, the potential implication of parental influence in density-related changes in life-history traits remains unclear in many insects that exhibit fluctuating population dynamics, particularly locusts. In this study, we report a laboratory experiment, which enabled us to characterize the life-history trait modifications induced by parental crowding of female individuals from a frequently outbreaking population of Locusta migratoria (Linnaeus) (Orthoptera: Acrididae). We found that a rearing history of crowding led to reduced...
Tipo: Journal Article Palavras-chave: CRIQUET CONTROLLED LABORATORY EXPERIMENT; CROWDING; DENSITY-DEPENDENT POLYPHENISM; LIFE-HISTORY; LOCUST; OFFSPRING QUALITY; PARENTAL EFFECTS; OUTBREAK; PEST; REPRODUCTIVE TIMING.
Ano: 2010 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20102d27fcfe&uri=/notices/prodinra1/2010/12/
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