scholarly journals Evaluating Gene Flow Using Selected Markers: A Case Study

Genetics ◽  
1998 ◽  
Vol 149 (3) ◽  
pp. 1383-1392 ◽  
Author(s):  
Thomas Lenormand ◽  
Thomas Guillemaud ◽  
Denis Bourguet ◽  
Michel Raymond
Keyword(s):  
Gene Flow ◽  
Insecticide Resistance ◽  
Local Adaptation ◽  
Culex Pipiens ◽  
Selection Pressure ◽  
Fitness Costs ◽  
Southern France ◽  
Culex Pipiens Pipiens ◽  
Selection Intensities

Abstract The extent to which an organism is locally adapted in an environmental pocket depends on the selection intensities inside and outside the pocket, on migration, and on the size of the pocket. When two or more loci are involved in this local adaptation, measuring their frequency gradients and their linkage disequilbria allows one to disentangle the forces—migration and selection—acting on the system. We apply this method to the case of a local adaptation to organophosphate insecticides in the mosquito Culex pipiens pipiens in southern France. The study of two different resistance loci allowed us to estimate with support limits gene flow as well as selection pressure on insecticide resistance and the fitness costs associated with each locus. These estimates permit us to pinpoint the conditions for the maintenance of this pocket of adaptation as well as the effect of the interaction between the two resistance loci.

scholarly journals FITNESS COSTS OF INSECTICIDE RESISTANCE IN NATURAL BREEDING SITES OF THE MOSQUITO CULEX PIPIENS

Evolution ◽  
2004 ◽  
Vol 58 (1) ◽  
pp. 128 ◽  
Author(s):  
Denis Bourguet ◽  
Thomas Guillemaud ◽  
Christine Chevillon ◽  
Michel Raymond
Keyword(s):  
Insecticide Resistance ◽  
Culex Pipiens ◽  
Fitness Costs ◽  
Breeding Sites ◽  
Natural Breeding

scholarly journals FITNESS COSTS OF INSECTICIDE RESISTANCE IN NATURAL BREEDING SITES OF THE MOSQUITO CULEX PIPIENS

Evolution ◽  
2004 ◽  
Vol 58 (1) ◽  
pp. 128-135 ◽  
Author(s):  
Denis Bourguet ◽  
Thomas Guillemaud ◽  
Christine Chevillon ◽  
Michel Raymond
Keyword(s):  
Insecticide Resistance ◽  
Culex Pipiens ◽  
Fitness Costs ◽  
Breeding Sites ◽  
Natural Breeding

scholarly journals Gonoactivity of Culex (Culex) (Diptera: Culicidae) Mosquitoes During Winter in Temperate Argentina

2021 ◽  
Author(s):  
María Florencia Branda ◽  
Magdalena Laurito ◽  
Andrés Mario Visintin ◽  
Walter Ricardo Almirón
Keyword(s):  
Developmental Stage ◽  
Culex Quinquefasciatus ◽  
Culex Pipiens ◽  
Life Cycles ◽  
Morphological Identification ◽  
Dry Ice ◽  
Culex Pipiens Pipiens ◽  
Host Seeking ◽  
Baited Traps ◽  
The City

Abstract The subgenus Culex L. includes species involved in summer–autumn arbovirus transmission but studies during winter are scarce in temperate Argentina. Female specimens were collected host-seeking at dry-ice-baited traps during autumn–winter–spring at two sites in Córdoba City during 2016 and 2017. The specimens were morphologically identified and dissected to determine the follicular developmental stage (gonotrophic activity). Females with advanced follicular stages (≥III) were subjected to molecular procedures to confirm or re-identify previous morphological identification. Five species (Culex apicinus Philippi (Diptera: Culicidae), Culex dolosus (Lynch-Arribálzaga) (Diptera: Culicidae), Culex maxi Dyar (Diptera: Culicidae), Culex pipiens pipiens L. (Diptera: Culicidae), and Culex quinquefasciatus Say (Diptera: Culicidae)) were collected and found gonoactive during winter; showing that a high proportion of Culex (Culex) females remain reproductively active during the unfavorable season for mosquito populations. Among them, it is worth noting the collection of Cx. quinquefasciatus, vector of the St. Louis encephalitis virus (endemic in the city), a specimen of Cx. p. pipiens, and a hybrid of Cx. p. pipiens/Cx. quinquefasciatus (during autumn). The study of this community during winter should continue because a high gonoactive female proportion with advanced follicular stages was found: 29.12 and 13.07% in 2016 and 2017, respectively. Local studies such as this one provide evidence about ornithophilic Culex species with active year-round life cycles, species that could favor arbovirus overwintering.

Long distance pollen-mediated gene flow at a landscape level: the weed beet as a case study

2007 ◽  
Vol 16 (18) ◽  
pp. 3801-3813 ◽  
Author(s):  
STÉPHANE FÉNART ◽  
FRÉDÉRIC AUSTERLITZ ◽  
JOËL CUGUEN ◽  
JEAN-FRANÇOIS ARNAUD
Keyword(s):  
Gene Flow ◽  
Long Distance ◽  
Landscape Level

Tracking the evolution of insecticide resistance in the mosquito Culex pipiens

Nature ◽  
10.1038/23685 ◽  
1999 ◽  
Vol 400 (6747) ◽  
pp. 861-864 ◽  
Author(s):  
Thomas Lenormand ◽  
Denis Bourguet ◽  
Thomas Guillemaud ◽  
Michel Raymond
Keyword(s):  
Insecticide Resistance ◽  
Culex Pipiens

Viability of Culex pipiens pipiens eggs affected by nutrition and aposymbiosis

1985 ◽  
Vol 45 (2) ◽  
pp. 225-230 ◽  
Author(s):  
Dominic S.T. Awahmukalah ◽  
Marion A. Brooks
Keyword(s):  
Culex Pipiens ◽  
Culex Pipiens Pipiens

Communication to the Editor Insecticide Resistance in a Strain ofAphis gossypiifrom Southern France

1997 ◽  
Vol 49 (1) ◽  
pp. 90-96 ◽  
Author(s):  
Robert Delorme ◽  
Danielle Augé ◽  
Marie-Thérèse Béthenod ◽  
François Villatte
Keyword(s):  
Insecticide Resistance ◽  
Southern France
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