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      • 韓國のオンブバッタおよびショウリョウバッタモドキ 集團における 染色體變異

        茅野愛子,茅野博,吳文儒 濟州大學校 基礎科學硏究所 1993 基礎科學硏究 Vol.6 No.1

        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, i.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 (1] males). Chromosomes of primary spermatocytes of 14 males of Gonista bicolor collected in a population in Chjudo, Cheju Do, Republic of Korea, were observed. Seven males were found to have B-chromosomes of two type, 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 B₁and B₂were the same as those found in the populations in Kyushu, Japan (Sannomiya 1974). 1.韓國全羅南道海南において授集したオンブバッタの雄17個體の第一精母細胞の染色體を觀察した. 12個體では9個の2價染色體と1個の1價染色體(X染色體)が見られたが, 5個體では, 前記の染色體の外にB染色體をもっていた(2n?=18+X+0~3B). B染色體の數は同一の個體の精巢でも, フォリクルによって異なっていた. しかし. 1つのフォリクルの中では, どの第一精母細胞にも同じ數のB染色體が見られた. 5個體のそれぞれにおけるB染色體の數の變動の範圍は, 0~2, 0~2, 1~2, 0~3, および, 0~3であった. これらのB染色體の細胞學的特徵は, Sannomiya(1973)が日本(九州)の集團について報告したものと同じであった. 2.韓國海南のオンブバッタ集團では, 常染色體の第9染色體に, 過剩部分をもつS型と, 過剩部分をもたないN型とが區別された. この過剩部分は眞正染色質であった. 二價染色體の特徵から, 接合體の染色體型として, S/S(1個體), S/N(5個體), および, N/N(11個體)の3型が識別された. 3.韓國濟州島のショウリョウバッタモドキ集團から雄14個體を採集し, 第一精母細胞の染色體を견察した. 7個體では11個の二價染色體と1個の一價染色體(X染色體)をもっていたが, 他の7個體には前記の染色體の外に, B染色體が含まれていた(2n=22+X+0~1 B₁+0~4 B₂). B₁は2個體に, また, B₂は5個體に見られた. B₁はどの第一精母細胞にも1個見られた. しかし, B₂の數は同一の個體の精巢の中でも, フォリクルによって異なっていた. 5個體のそれぞれにおけるB₂染色體の數の變動の幅は, 1~2, 1~2, 1~2, 1~3, および, 2~4であった. B₁およびB₂の特徵は, 日本(九州)のショウリョウバッタモドキの集團について, Sannomiya(1974)が報告したB染色體と同じであった.

      • 韓國のオブバッタおよびショウリョウバッタモドキ集團における染色體變異

        茅野 博,吳文儒,茅野愛子 濟州大學校 基礎科學硏究所 1994 基礎科學硏究 Vol.7 No.1

        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♂=18₁×10~3 B,Figs.1ㆍ6). 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, I. 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, B₁and 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 B₁and B₂were the same as those found in the populations in Kyushu, Japan (Sannomiya 1974). 1. 韓國全羅南道海南において採集したオンブバッタの雄17個體の第一精母細胞の染色體を觀察した. 12個體では9個の2價染色體と1個の1價染色體(X染色體)が見られたが, 5個體では, 前記の染色體の外にB染色體をもっていた(2n♂=18+X+0~3B). B染色體の數は同一の個體の精巢でも, フォリクルによって異なっていた. しかし. 1つのフォリクルの中では, どの第一精母細胞にも同じ數のB染色體が見られた. 5個體のそれぞれにおけるB染色體の數の變動の範圍は, 0∼2, 0∼2, 1∼2, 0∼3, および, 0∼3であった. これらのB染色體の細胞學的特徵は, Sannomiya (1973) が日本 (九州) の集團について報告したものと同じであった. 2. 韓國海南のオンブバッタ集團では, 常染色體の第9染色體に, 過剩部分をもつS型と, 過剩部分をもたないN型とが區別された. この過剩部分は眞正染色質であった. 二價染色體の特徵から, 接合體の染色體型として, S/S(1個體), S/N(5個體), および, N/N(11個體)の3型が識別された. 3. 韓國濟州島のショウリョウバッタモドキ集團から雄14個體を採集し, 第一精母細胞の染色體を觀察した. 7個體では11個の二價染色體と1個の一價染色體(X染色體)をもっていたが, 他の7個體には前記の染色體の外に, B染色體が含まれていた(2n♂=22+X+0~1B₁+0~4B₂). B₁は2個體に, また, B₂は5個體に見られた. B₁はどの第一精母細胞にも1個見られた. しかし, B₂の數は同一の個體の精巢の中でも, フォリクルによって異なっていた. 5個體のそれぞれにおけるB₂染色體の數の變動の幅は, 1∼2, 1∼2, 1∼2, 1∼3, および, 2∼4であった. B₁およびB₂の特徵は, 日本(九州)のショウリョウバッタモドキの集團について, Sannomiya (1974)が報告したB染色體と同じであった.

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