マイマイガの弱強両種族交配F_1成虫における卵巣移植

概要

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The hosts used in the ovarian transplantation are the F_1-animals from the cross between a female of the Sa.-A strain (the weak race from Sapporo) and a male of the Noh.-B strain (the strong race from Noheji, Aomori Pref.) of the gypsy-moth. They received, without gonadectomy, a pair of larval ovaries of the Noh.-A strain (the strong race from Noheji) at their 4th instar stage. Details of the results are shown in Table 1. From the study of external morphology, all of them were males which included the normal males (XX) and those produced by sex-reversal (XY), but the latter were not easily distinguished from the former in general appearance. Histological investigations of their imaginal gonads, however, revealed that three out of them were female intersexes bearing the gonads in which male and female germ cells were recognizable (Fig. 1). The results of the present study reveal that the grafted ovaries exert no appreciable influence upon the external sex characters of the host.
社団法人日本動物学会の論文
1955-04-15