中国水蛇和铅色水蛇染色体组型的比较研究A Comparision of the Karyotypes of the Water Snakes, Enhydris chinensis and Enhydris plumbea
吴美锡;
摘要(Abstract)：
本文报道福州近郊的中国水蛇和铅色水蛇的染色体组型比较研究的结果.两种蛇的染色体数目均为2n=36,其中8对为大染色体,10对为小染色体,各对染色体的相对长度和臂比指数相似.二者的第1、3、6对为中间着丝点;第2对为近中间着丝点;第5对为近端着丝点;第7、8对为端着丝点;第4对均为性染色体.雄性染色体二倍体同型为ZZ,雌性染色体二倍体异型为ZW,Z为中间着丝点,W为近端着丝点,并且与Z染色体接近同样大小.因此,两种蛇的染色体组型基本相同.这说明水游蛇亚科的水蛇属与游蛇亚科的某些种在性染色体的分化上及其染色体组型,均有相似之处.
关键词(KeyWords)：
基金项目(Foundation):
作者(Authors): 吴美锡;
参考文献(References)：
- Baker, R. J., J. Bull and G. A. Mengden. 1971 Chromosomes of Elape subocularis (Reptilia, Serpentes), with the descriptions of an in vivo technique for preparation of snake chromosomes. Experientia 15, 10．
- Beqak, W., M. L. Becak, H. R. S. Nathareth and S. Ohno. 1961 Close karyotypical kinship between reptilian suborder Serpentes and the class Aves. Chromosoma (Berl.) 15: 606-617．
- Becak, W., and M. L. Becak, 1969 Cytotaxonomy and chromosomal evolution in Serpentes. Cytogenctics 8: 247-262．
- Hardy, L. M., 1976 The chromosomes of a rare Mexican Colubrid snake. Copeia 1:189-191．
- Itoh, M., M. Sasaki and S. Makino. 1970 The Chromosomes of some Japanese snakes, with special regard to sexual dimorphism. Japan. J. Genetics 45, No. 2,121-128．
- Ohno, S., 1967 Sex chromosomes and sex-linked genes. Monogr. Endocrinol. Vol,1, Springer-Verlag.
- Ohno, S. C. Stenhus, E. Faisst and M. T. Zenzes, 1965 Postzygotic chromosomal rearrangements in rainbow trout (Salmo irideus Gibbons). Cytogenetics 4: 117-129．
- Tijo, J. H., Whang, J.: Direct chromosome preparations of bone marrow cells. In: Human chromosome methodology, J. J. Yunis. New York-London: Academic Press 1965．