韓国のオンブバッタおよびショウリョウバッタモドキ集団における染色体変異
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概要
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Chromosomes of primary spermatocytes of 17 males of Atractomorpha bedeli collected in a population at Haenam, Chollanam Do, Republic of Korea, were observed. Supernumerary chromosomes (B-chromosomes) were found in five males (2n♂=18+X+0～3B, Figs. 1-6). The numbers of B's were constant among the cells within the follicles but were variable among the follicles within the testes of the males (Table 1). The characteristics of the B's were the same as those found in the populations in Kyushu, Japan (Sannomiya 1973). The 9th chromosomes (the smallest among the complement) of A. bedeli were of two types, S with a distal supernumerary segment, 1. e., segmented, and N, non-segmented (Figs. 1-6, 7-10, 11-16). The supernumerary segment was euchromatic (Figs. 11 and 12). Three kinds of karyomorphs were distinguishable as follows: S/S (a single male) , S/N (five males), and N/N (11 males). Chromosomes of primary spermatocytes of 14 males of Gonista bicolor collected in a population in Chejudo, Cheju Do, Republic of Korea, were observed. Seven males were found to have B-chromosomes of two types, B1 and B2 (2n ♂=22+X+0～1B1+0～4B2; Figs. 17-22). The B1's were found in two males in which all the primary spermatocytes had a single B1. The B2's were found in five males. The numbers of B2's were variable among the follicles of the testes, while the primary spermatocytes within the follicles had the same number of B2's (Table 3). The characteristics of B1 and B2 were the same as those found in the populations in Kyushu, Japan (Sannomiya 1974).
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