The wall degradation hypotonic method of preparing mitotic chromosome sample was used and the results of karyotype analysis showed that the two cucumis were almost the same according to the constitution of chromosomes: 2 n =24=18 m+4 sm+2 sm(SAT).

• 结果表明 :两种植物均具有 2 4条染色体 ；中部着丝点的染色体 9对 ；近中端着丝点的染色体 3对 ；包括一对具随体的染色体 .；其核型公式均为 :2 n=2 4=1 8m+ 4sm+ 2 sm(SAT)；按照 Stebbins的核型分类方法；细胞类型均为 2 A