棕黑锦蛇赤峰亚种染色体组型、C带和Ag-NOR_s研究  

Studies on the Karyotype, C-banding Pattern and Ag-NORs of Elaphe schrenckii anomala

作　　者：郭超文[1,2] 马虹[1,2] 

机构地区：[1]安徽师范大学生物系 [2]安徽省滁州卫生学校

出　　处：《遗传》1997年第3期20-22,共3页Hereditas（Beijing)

摘　　要：以骨髓细胞为材料研究了棕黑锦蛇赤峰亚种的染色体，结果表明，该物种的２ｎ＝３６，由８对大型的和１０对微小的染色体组成，ＡＦ＝５０。Ｎｏ．４为性染色体（ＺＷ型）；所有大型染色体均显示端粒深染Ｃ带，但仅Ｎｏ．２、３、５和Ｚ染色体显示着丝粒浅染Ｃ带。Ｗ染色体为整条Ｃ带阳性；该物种一对ＮＯＲ分布于微小染色体。锦蛇属核型可能经历过染色体间的着丝粒融合的罗伯逊易位。This paper reports the karyotype, C-bands and Ag-NORs of Elaphe schrenckii anomala (Boulenger). The diploid number, 2n=36, comprising 8 pairs of macro- and 10 pairs of microchromosomes in the E. s. anomala. AF=50. The No. 4 is sex chromosome, which belong to ZW type. The C-banding technique revealed telomeric constitutive heterochromatin in the whole macrochromosomes. But the centromeric C band was only observed in No. 2, 3, 5 and Z chromosome, while a whole W chromosome is constitutive heterochromatinization. Two NORs was observed in group of microchromosome.

关 键 词：染色体组型 C带 AG-NORS 棕黑锦蛇 

分 类 号：Q959.620.3[生物学—动物学]