A coparative study on karyptypes and chromosome banding pattern of three odor frogs of Rana

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	A coparative study on karyptypes and chromosome banding pattern of three odor frogs of Rana
其他题名	臭蛙群三种蛙类核型及染色体带型的比较
	Liu WZ; Yang DT
	1994
发表期刊	动物学研究
卷号	15 期号:增刊页码:166-174
合作性质	其它
摘要	The chromosomes of three odor frogs, Luetuosae-group of Rana were analyzed by conventional, as well as C-banding and silver staining techniques. The three species here examined all had 26-chromosome karyotypes encompassing 5 large and 8 small homologous pairs. Differences among them were found in gross shapes of chromosomes and positions of secondary constrictions. Generally speaking, karyotypes of R.andersonii and R.grahami resembled each other, while the karyotype of R.tiannanensis differen from the former two in several respects. Analyses of karyotypes by C-banding technique indicated that, centromeric areas of every chromosome and interstitial parts of some chromosomes of each species were hetero-chromatinized, and differences of distribution of heterochromatin were found among species. In early metaphase plates of R.andersonii, much more heterochromatinized areas were observed, and when it reached late metaphase, the numbers of heterochromatin sections in each chromosome pair reduced to a limited level, e.g. centromeres and a few intersititial parts. The active nucleolar organizer regions (NORs) were localized in long arms of pair No. 10, in connection with secondary constrictions for R.andersonii and R.grahami as in other odor frogs previously reported,but in the long arm of pair No. 6 for R. tiannanensis. The cytogenetic and taxonomic implications of the findings were discussed based on comparisons with each other, and with published leterature.
其他摘要	本文比较了3种臭蛙,即云南臭蛙（R. andersonii）、无指盘臭蛙（R.grahami）和滇南臭蛙（R.tiennanensis）的核型、C-带和银染核仁组织者区（Ag-NORs）。结果表明,3种臭蛙的核型均为2n=26（NF=52）,由5对大型染色体和8对小型染色体组成,与蛙科大多数种类的核型相似,但是染色体形态和次缢痕的位置和数目有差异。其中,云南臭蛙和无指盘臭蛙的核型相似程度比较大,与其他已报道的臭蛙类的核型相差不大,而滇南臭蛙的核型比较特殊,与其他臭蛙类的核型存在显著差异。 C-带技术显示的结果表明,3种臭蛙所有染色体的着丝点都有比较显著的C-带,而居间区C-带和端点C-带却存在明显的差异。3种中,滇南臭蛙的C-带带型比较特殊。有趣的是在研究中还发现,云南臭蛙的早中期细胞（染色体很长）染色体上发现了很多结构异染色质区,除着丝点C-带外,几乎所有的染色体上都有居间区或端点C-带,而在晚中期细胞中所观察到的C-带数目却较少,除着丝点外,只在少数染色体上发现了C-带。云南臭蛙和无指盘臭蛙的Ag-NORs位于第10对染色体的长臂上,与该染色体上的次缢痕位置相对应,而滇南臭蛙的Ag-NORs位于第6对染色体的长臂上。综上所述,云南臭蛙与无指盘臭蛙的核型及带型较相似,与其他臭蛙相比也有不少共同之处,而滇南臭蛙的核型和带
关键词	Amphibia Ranidae Rana Karyptype Ag-nors C-banding Pattern
收录类别	其他
语种	英语
文献类型	期刊论文
条目标识符	http://ir.kiz.ac.cn/handle/152453/1246
专题	其他
作者单位	Kunming Institute of Zoology, the Chinese Academy of Sciences
推荐引用方式 GB/T 7714	Liu WZ,Yang DT. A coparative study on karyptypes and chromosome banding pattern of three odor frogs of Rana[J]. 动物学研究,1994,15(增刊):166-174.
APA	Liu WZ,&Yang DT.(1994).A coparative study on karyptypes and chromosome banding pattern of three odor frogs of Rana.动物学研究,15(增刊),166-174.
MLA	Liu WZ,et al."A coparative study on karyptypes and chromosome banding pattern of three odor frogs of Rana".动物学研究 15.增刊(1994):166-174.

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