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Studies of four thelytokous puerto rican isolates ofMuscidifurax uniraptor [Hymenoptera: Pteromalidae]

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Abstract

Field collections in Puerto Rico revealed 4 behaviorally distinct isolates ofMuscidifurax uniraptor Kogan & Legner that differed initially in diapause and nondiapause emergence, and the age when ♀ progeny were produced. Subsequent F1 and F2 progeny differed in sex ratio and total progeny production. Mating F2 ♀ ♀ from nondiapause isolates to naturally emerging ♂ ♂ from thelytokous populations significantly reduced total progeny and the proportion of ♀ ♀ toca. 20 %. These mated ♀ ♀ at first resembled in behavior those which originated from diapausing parents. Random mating within all isolates beginning in the F3, resulted in a general lower survival and progeny production but was accompanied by a rise in sex ratio toca. 50% ♀ ♀ by the F6 generation. The interinvolvement of extranuclear and genic factors is considered.

Résumé

Les récoltes effectuées à Puerto Rico ont révélé 4 isolats thélytoques deMuscidifurax uniraptor Kogan et Legner qui se différencient par leur comportement. Ils diffèrent d'abord par l'apparition ou non de la diapause, la descendance totale et le pourcentage des sexes dans la F1 et la F2. L'accouplement de ♀ ♀ F2 issues d'isolats non diapausants avec des ♂ ♂ thélytoques réduit d'une manière significative la descendance totale et la proportion des femelles à environ 20 %. Des femelles qui en provenaient ressemblaient d'abord, dans leur comportement, à celles issues de parents en diapause. Cependant, l'accouplement réalisé au hasard parmi tous les isolats commençant à la F3 entraînait en général une réduction de la survie et de la descendance accompagnée par une proportion des sexes d'environ 50 % de femelles par génération de F6. On examine les facteurs extranucléaires et génétiques.

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  1. Division of Biological Control, University of California, 92521, Riverside, CA

    E. F. Legner

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Legner, E.F. Studies of four thelytokous puerto rican isolates ofMuscidifurax uniraptor [Hymenoptera: Pteromalidae]. Entomophaga 33, 269–280 (1988). https://doi.org/10.1007/BF02372616

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  • DOI: https://doi.org/10.1007/BF02372616

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