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Inheritance of resistance to acrinathrin in Frankliniella occidentalis (Thysanoptera: Thripidae)
Author(s) -
Bielza Pablo,
Quinto Vicente,
Fernández Esther,
Grávalos Carolina,
Abellán Jaime,
Cifuentes Dina
Publication year - 2008
Publication title -
pest management science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.296
H-Index - 125
eISSN - 1526-4998
pISSN - 1526-498X
DOI - 10.1002/ps.1540
Subject(s) - thripidae , biology , western flower thrips , pest analysis , thrips , locus (genetics) , trait , genetics , resistance (ecology) , quantitative trait locus , botany , horticulture , gene , agronomy , computer science , programming language
Abstract BACKGROUND: The western flower thrips (WFT), Frankliniella occidentalis (Pergande), is an economically important pest. The genetic basis of acrinathrin resistance was investigated in WFT. RESULTS: The resistant strain, selected in the laboratory for acrinathrin resistance from a pool of thrips populations collected in Almeria (south‐eastern Spain), showed a high resistance to acrinathrin (43‐fold based on LC 50 values) compared with the laboratory susceptible strain. Mortality data from reciprocal crosses of resistant and susceptible thrips indicated that resistance was autosomal and not influenced by maternal effects. Analysis of probit lines from the parental strains and reciprocal crosses showed that resistance was expressed as a codominant trait. To determine the number of genes involved, a direct test of monogenic inheritance based on the backcrosses suggested that resistance to acrinathrin was probably controlled by one locus. Another approach, which was based on phenotypic variances, showed n E , or the minimum number of freely segregating genetic factors for the resistant strain, to be 0.79. CONCLUSION: The results showed that acrinathrin resistance in WFT was autosomal and not influenced by maternal effects, and was expressed as a codominant trait, probably controlled by one locus. Copyright © 2008 Society of Chemical Industry