棕黑锦蛇赤峰亚种染色体组型、C带和Ag-NORs研究

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。 Abstract: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 macrochromosome.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.

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

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.