| 横断山区四种湍蛙的细胞遗传学研究 |
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| 引用本文： | 吴政安,潭安呜,赵尔宓.横断山区四种湍蛙的细胞遗传学研究[J].遗传学报,1987(1). |
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| 作者姓名： | 吴政安 潭安呜 赵尔宓 |
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| 作者单位： | 中国科学院发育生物学研究所 北京
(吴政安)，中国科学院成都生物研究所 成都
(潭安呜)，中国科学院成都生物研究所 成都(赵尔宓) |
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| 摘 要： | 通过染色体组型分析,C带(BSG技术)分析及一种简便的Ag-NORs带分析,对四川湍蛙、理县湍蛙、棕点湍蛙和棘皮湍蛙的种间关系、染色体的演化及其性染色体等问题进行了初步探讨。结果表明:(1)四川湍蛙、理县湍蛙和棕点湍蛙之间的亲缘关系较近,而它们与棘皮湍蛙的亲缘关系较远;(2)在近缘种的分化中,染色体结构异染色质的变化和臂间倒位是重要的因素之一,这在小型染色体上表现得尤为突出;(三)四川湍蛙具有在形态上分化很明显的性染色体。C带分析表明,此性染色体主要由常染色质构成,但在其Y染色体的长臂上存在明显的中间C带,推测尚处于性染色体分化的初期阶段。
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| 关 键 词： | 核型分析 C带带型 银染区(Ag-NORs) 两栖动物 湍蛙性染色体 |
Cytogenetic Studies on Four Species of Amolopa in the Hengduan Range |
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| Wu Zhengan.Cytogenetic Studies on Four Species of Amolopa in the Hengduan Range[J].Journal of Genetics and Genomics,1987(1). |
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| Authors: | Wu Zhengan |
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| Abstract: | Using karyotypic analysis,BSG technique and a quick,simple Ag-NORs staining method,we studied the inter-species relations,chromosome evolution and sex chromosomes of Amolops mantzorum,A.lifanensis,A.loloensis and A.granulosus.Results indicate: 1.The kinship of A.mantzorum,A.liianensts and A.loloensis is closer,and their relationship with A.granulosus is further; 2.In differentiation of closely related species,the changes in heterochromatin and pericentric inversions are key factors,this is well' noted in the small chromosomes; 3.A.mantzorum has well-differentiated XY type sex chromosomes,the Y chromosome is mainly composed of euchromatin,but has strong C-band in the middle of the long arm.It is suggested that the Y chromosome of A.mantzorum is in the initial stage of sex chromosome differentiation. |
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| Keywords: | Karyological analysis C-banding Ag-NORs Amphibians Sex chromosome of Amolops |
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