Inbreeding and Rotational Breeding of the Parasitoid Fly, Exorista japonica (Diptera: Tachinidae), for Successive Rearing

概要

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Successive rearing of the tachinid fly, Exorista japonica TOWNSEND, a natural enemy of many lepidopterous larvae, was conducted using two different breeding techniques in order to provide insects for small and medium-scale laboratory experiments. Ten pairs of parasitoids collected in the field were used as the parent generation to begin the inbreeding and rotational breeding experiments. The rates of adult emergence and host motrality decreased even at F_2, and lines derived from all pairs became extinct by F_6, under the inbreeding conditions, However these rates did not differ significantly from F_1 to F_9 during rotational breeding. When a sister and a non-sister female fly were simultaneously provided as potential mates, male flies did not avoid sib-mating. Therefore, rotational breeding is necessary to prevent inbreeding depression when rearing these parasitoids in a laboratory on a relatively small scale.
日本応用動物昆虫学会の論文
1996-08-25