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水貂的染色体研究 被引量:1

STUDIES ON THE CHROMOSOME OF MINK (MUSTELA VISION)
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摘要 采用复制带、C带和硝酸银染色等分带技术研究了水貂的核型和带型。结果表明,2n=30,枝型为10(M)+16(SM)+2(A),XX(M)。C-带显示该水貂的一些染色体的结构异染色质比较丰富,从着丝粒区域延伸到两臂上,No.5染色体着丝粒结构异染色质有些弱化;X染色体的结构异染色质较常染色体的丰富。Ag-NORs有3个,分布在No.8染色体的次缢痕区域和一条No.2染色体长臂接近着丝粒的区域。 The chromosomes of mink (Mustela vision) had been studied by several banding techniques (C-banding,silver staining and late replication banding). The results are giv-en as below:The diploid number of the mink is 30. Autosomes consist of 5 pairs of meta-centrics, 8 pairs of submetacentrics and 1 pair of acrocentrics. Chromosome No. 8 has a clear secondary constriction on the short arm. X chromosome is a metacentric and its size is almost as the same as Chromosome No. 11.The C-bands of the mink chromosomes are mainly restricted to the centromeric re-gions. Chromosomes Nos. 2, 3, 4, 7 and 8 have large C-bands, extending from the cen-tromere to both arms. The heterochromatin of X chromosome is more abundant than that of autosomes. But the C-band of centromere region of chromosome No. 5 is small and stained slightly.There are three Ag-NORs in the silver-stained karyotype, one pair of them are 1o-cated at the secondary constriction of chromosome No. 8, the other one is located at the long arm of chromosome No. 2, which is only one chromosome with A8-NORs.
出处 《兽类学报》 CAS CSCD 北大核心 1998年第3期192-195,共4页 Acta Theriologica Sinica
关键词 水貂 核型 带型 染色体 Mink (Mustela vision) Karyotype Banding patterns
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参考文献10

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