Investigation of relative development and reproductivity fitness cost in three insecticide-resistant strains of Aedes aegypti from Thailand

© 2019 by the authors. Licensee MDPI, Basel, Switzerland. Knockdown resistance (kdr) and detoxification enzymes are major resistance mechanisms in insecticide-resistant Aedes aegypti throughout the world. Persistence of the resistance phenotype is associated with high fitness of resistance alleles i...

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Main Authors: Jassada Saingamsook, Jintana Yanola, Nongkran Lumjuan, Catherine Walton, Pradya Somboon
Format: Journal
Published: 2020
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http://cmuir.cmu.ac.th/jspui/handle/6653943832/67527
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Institution: Chiang Mai University
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spelling th-cmuir.6653943832-675272020-04-02T14:54:12Z Investigation of relative development and reproductivity fitness cost in three insecticide-resistant strains of Aedes aegypti from Thailand Jassada Saingamsook Jintana Yanola Nongkran Lumjuan Catherine Walton Pradya Somboon Agricultural and Biological Sciences © 2019 by the authors. Licensee MDPI, Basel, Switzerland. Knockdown resistance (kdr) and detoxification enzymes are major resistance mechanisms in insecticide-resistant Aedes aegypti throughout the world. Persistence of the resistance phenotype is associated with high fitness of resistance alleles in the absence of insecticide pressure. This study determined the relative fitness cost of three insecticide-resistant strains of Aedes aegypti-PMD, PMD-R, and UPK-R-and a hybrid under similar laboratory conditions in the absence of insecticide. The PMD strain is resistant to DDT with no kdr alleles; the PMD-R is resistant to DDT and permethrin with 1534C homozygous kdr alleles; and UPK-R is resistant to DDT, permethrin, and deltamethrin with 989P + 1016G homozygous alleles. The DDT-resistant PMD strain had the highest fitness compared with the two DDT/pyrethroid-resistant strains (PMD-R and UPK-R) and hybrid. Consistent fitness costs were observed in the DDT/pyrethroid-resistant strains and hybrid, including shorter wing length, reduced egg hatchability, shorter female lifespan, and shorter viability of eggs after storage, whereas no effect was observed on blood feeding rate. In addition, reduced egg production was observed in the PMD-R strain and prolonged developmental time was seen in the UPK-R strain. The corresponding hybrid that is heterozygous for kdr alleles was fitter than either of the homozygous mutant genotypes. This is in accordance with the high frequency of heterozygous genotypes observed in natural populations of Ae. aegypti in Chiang Mai city. 2020-04-02T14:54:12Z 2020-04-02T14:54:12Z 2019-09-01 Journal 20754450 2-s2.0-85073369924 10.3390/insects10090265 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85073369924&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/67527
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
topic Agricultural and Biological Sciences
spellingShingle Agricultural and Biological Sciences
Jassada Saingamsook
Jintana Yanola
Nongkran Lumjuan
Catherine Walton
Pradya Somboon
Investigation of relative development and reproductivity fitness cost in three insecticide-resistant strains of Aedes aegypti from Thailand
description © 2019 by the authors. Licensee MDPI, Basel, Switzerland. Knockdown resistance (kdr) and detoxification enzymes are major resistance mechanisms in insecticide-resistant Aedes aegypti throughout the world. Persistence of the resistance phenotype is associated with high fitness of resistance alleles in the absence of insecticide pressure. This study determined the relative fitness cost of three insecticide-resistant strains of Aedes aegypti-PMD, PMD-R, and UPK-R-and a hybrid under similar laboratory conditions in the absence of insecticide. The PMD strain is resistant to DDT with no kdr alleles; the PMD-R is resistant to DDT and permethrin with 1534C homozygous kdr alleles; and UPK-R is resistant to DDT, permethrin, and deltamethrin with 989P + 1016G homozygous alleles. The DDT-resistant PMD strain had the highest fitness compared with the two DDT/pyrethroid-resistant strains (PMD-R and UPK-R) and hybrid. Consistent fitness costs were observed in the DDT/pyrethroid-resistant strains and hybrid, including shorter wing length, reduced egg hatchability, shorter female lifespan, and shorter viability of eggs after storage, whereas no effect was observed on blood feeding rate. In addition, reduced egg production was observed in the PMD-R strain and prolonged developmental time was seen in the UPK-R strain. The corresponding hybrid that is heterozygous for kdr alleles was fitter than either of the homozygous mutant genotypes. This is in accordance with the high frequency of heterozygous genotypes observed in natural populations of Ae. aegypti in Chiang Mai city.
format Journal
author Jassada Saingamsook
Jintana Yanola
Nongkran Lumjuan
Catherine Walton
Pradya Somboon
author_facet Jassada Saingamsook
Jintana Yanola
Nongkran Lumjuan
Catherine Walton
Pradya Somboon
author_sort Jassada Saingamsook
title Investigation of relative development and reproductivity fitness cost in three insecticide-resistant strains of Aedes aegypti from Thailand
title_short Investigation of relative development and reproductivity fitness cost in three insecticide-resistant strains of Aedes aegypti from Thailand
title_full Investigation of relative development and reproductivity fitness cost in three insecticide-resistant strains of Aedes aegypti from Thailand
title_fullStr Investigation of relative development and reproductivity fitness cost in three insecticide-resistant strains of Aedes aegypti from Thailand
title_full_unstemmed Investigation of relative development and reproductivity fitness cost in three insecticide-resistant strains of Aedes aegypti from Thailand
title_sort investigation of relative development and reproductivity fitness cost in three insecticide-resistant strains of aedes aegypti from thailand
publishDate 2020
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85073369924&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/67527
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