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234.  Derived from:  Legner, E. F.  1987.  Some quantitative aspects of inheritance in breeding synanthropic fly parasitoids.  Bull. Soc. Vect. Ecol. 12(2);  528-533. 




          The inheritance of solitary and gregarious development in two strains of Muscidifurax raptorellus Kogan & Legner appears quantitative, as successive backcrosses of hybrids to original parental males result in additive intensities of trait expression.  The magnitude of each increase is dependent on the number of backcrosses that are performed to create the hybrid, the particular "load" of backcrosses that a hybrid possesses determining the degree to which the next mating will affect behavior.  The curve for increasing expression of behavior appears sigmoid.  Females changed their behavior significantly immediately following mating.  Thus, for biological control the liberations of parasitoid males possessing certain desirable traits, such as high fecundity or parasitization rates might be a rapid way to enhance control of target hosts by causing expression of the trait in feral females with whom the males mate, as well as by the resultant offspring.


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