摘要
本文分析比较了宝兴泛树蛙（无尾目，树蛙科）四个地理居群的核型、 Ｃ－带和Ａｇ－ＮＯＲｓ，结 果表明它们有相同的２ｎ＝２６，ＮＦ＝５２，和相同的核型模式： ５＋８。但是，它们彼此之间在ＳＭ数 目和顺序、次缢痕或随体的位置以及银染的位置、Ｃ－带类型等都有所不同。普雄居群：Ｎｏｓ．２，３， ６， ９为 ＳＭ，次缢痕和 Ａｇ－ＮＯＲｓ在 １２ｑ ｉｎｔｅｒ；峨眉山居群： Ｎｏｓ．２， ３， ４， ７， ８， ９为 ＳＭ，随体 和Ａｇ－ＮＯＲｓ在１２ｑ ｔｅｒ；利川居群：Ｎｏｓ．２，４，７，８，１３为ＳＭ，次缢痕和Ａｇ－ＮＯＲｓ位于１０ｑ ｉｎｔｅｒ； 景东居群：Ｎｏｓ． ２，３为ＳＭ，随体和 Ａｇ－ＮＯＲｓ在 １２ｑ ｔｅｒ，且有较多的插入型和端位Ｃ－带。推测 居群间的核型分化是倒位和相互易位（包括常染色质和异染色质片段）的结果。文章对细胞地理学 研究的重要性作了讨论。
The karyotypes, C-bands and Ag-NORs of four populations of Polypedates dugritei from different geographical regions were compared. They have the same 2n=26 and 5 + 8 karyotypic formulae, but some dissimilarities were found among them. First, the number and Sequence of submetacentric chromosome were different among them, and then the sec- ondary contriction (SC) or satellite (Sat. ), Ag-NORs and C-band were also different. Nos. 2, 3, 6, 9, are SM,SC and Ag-NORs on 12q inter for Puxiong population;Nos. 2, 3, 4 , 7, 8, 9 are SM, Sat. and Ag-NORs on 12q ter for Mount Omei population ; Nos. 2, 4, 7, 8, 13 are SM, SC and Ag-NORs on 10q inter for Lichuan population. In Jingdong population Nos. 2,3 are SM only, Sat. and Ag-NORs are on 12q ter; besides the C-type C-bands, it has several ter-type and inter-type C-bands. These karyotypic and banding differences a- mong them probably resulted from the inversion and reciprocal transposition of heterochro- matins. The importance of cytogeography research is discussed.
出处
《动物学报》
SCIE
CAS
CSCD
1996年第4期414-420,共7页
ACTA ZOOLOGICA SINICA
基金
国家自然科学基金资助
关键词
蛙
宝兴泛树蛙
地理居群
染色体
Karyotype, C-banding, Ag-NORs,Polypedates dugritei, Cytogeography.
