| 鲬Platycephalus indicus（Linnaeus）的核型和Ag─NOR带研究 |
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| 引用本文： | 孔晓瑜,喻子牛,谢宗墉,徐文武.鲬Platycephalus indicus（Linnaeus）的核型和Ag─NOR带研究[J].中国海洋大学学报(自然科学版),1994(3). |
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| 作者姓名： | 孔晓瑜 喻子牛 谢宗墉 徐文武 |
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| 摘 要： | 采用ＰＨＡ体内注射肾细胞直接法和银染法研究的核型及Ａｇ－ＮＯＲ带。提出的核型公式为２ｎ＝４８，２ｍ＋８ｓｍ十２ｓｔ＋３６ｔ，ＮＦ＝５８。核型中第二对端部着丝点染色体（ｔ染色体）为典型的具次缢痕染色体。银染结果显示次缢痕部位为银集核仁组织者区（Ａｇ－Ｎｕ－ｃｌｅｏｌｕｓｏｒｇａｎｉｚｅｒｒｅｇｉｏｎ，Ａｇ－ＮＯＲｓ），并表现出数目和结构多态性。此外，还讨论了的不同群体间核型的差异，认为不同群体间存在明显的多态性。
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| 关 键 词： | 鲬，核型，Ag－NOR带，多态性 |
STUDIES ON KARYOTYPE AND Ag-NOR BANDING OF PLATYCEPHALUS INDICUS (LINNAEUS) |
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| Kong Xiaoyu, Yu Ziniu,Xie Zongyong, Xu Wenwu.STUDIES ON KARYOTYPE AND Ag-NOR BANDING OF PLATYCEPHALUS INDICUS (LINNAEUS)[J].Periodical of Ocean University of China,1994(3). |
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| Authors: | Kong Xiaoyu Yu Ziniu Xie Zongyong Xu Wenwu |
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| Institution: | Kong Xiaoyu; Yu Ziniu;Xie Zongyong; Xu Wenwu(Department of Aquaculture) (Scientefic Administration) |
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| Abstract: | The karyotype and Ag-NOR banding of Platycephalus indicus are examined from the renal tissue by the PHA injection-air drying method and the method of silver-staining. P. indicus has a diploid chromosome number of 48 and its karyotype formula is 2m 8sm 2st 36t, NF=58. The t2 chromosome pair in the karyotype are typical chromosomes with secondary constrictions. The results of silver-staining indicate that the regions of secondary constrictions are nucleolus organizer regions (Ag-NORs), and it is shown that there are quantitative and structural polymorphism of Ag-NORs in the species. The difference of karyotypes between the two populations of P. indicus is also discussed and it is believed that karyotype polymorphism exists in this species. |
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| Keywords: | Platycephalus indicus karyotype Ag-NOR banding polymorphism |
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