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Inheritance of dicrotophos resistance in greenhouse whitefly
Author(s) -
Omer Amir D.,
Tabashnik Bruce E.,
Johnson Marshall W.
Publication year - 1995
Publication title -
entomologia experimentalis et applicata
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.765
H-Index - 83
eISSN - 1570-7458
pISSN - 0013-8703
DOI - 10.1111/j.1570-7458.1995.tb01998.x
Subject(s) - trialeurodes , biology , greenhouse whitefly , backcrossing , homoptera , dominance (genetics) , pest analysis , genetics , veterinary medicine , botany , gene , medicine
We studied inheritance of resistance to dicrotophos in greenhouse whitefly, Trialeurodes vaporariorum Westwood (Homoptera, Aleyrodidae). Compared with females from a field‐collected susceptible strains (S), females from a resistant strain (R) of T. vaporariorum derived from heavily treated cotton fields had a 28‐fold greater LC 50 to dicrotophos in laboratory bioassays. Concentration‐mortality lines obtained from female progeny of reciprocal F 1 crosses (R♀ XS♂ and S♀ XR♂) were similar, suggesting that inheritance of dicrotophos resistance was autosomal and not influenced by maternal effects. Responses of F 1 female progeny were similar to those of the parental S strain, indicating that the resistance was partially recessive (degree of dominance, D, was −0.61). Mortality observed in female progeny obtained from a backcross (F 1 ♀ XR♂) corresponded more closely to expectations derived from polygenic models than to expectations from a monogenic model. The estimated number of effective factors (sensu Lande, 1981) contributing equally to resistance was three.