【摘要】 以棘胸蛙骨髓作材料。棘胸蛙的二倍体染色体组型为2n=26。10条大的和16条小的染色体,可配成13对。所有的染色体都是中央着丝点(第1、4、5、6、7、8、10、11、12和13对)和亚中着丝点(第2、3和9对),其核型为10m+3sm。在第7对短臂上常见有明显的次缢痕,在第3及第5对染色体长臂上偶见有微小的次溢痕。雌雄个体间未见异型染色体。作者认为次缢痕的位置可作为蛙属物种间标志之一。更多还原

【Abstract】 Analyses Karyotype of rana spinosa with its bone marrow as material, The diploid chromosome number is 26 ( 2n=26 ) ,10 large chromosomes and 16 small ones are homologously matched into 13 pairs. The chromosomes are metacentric ( Nos 1, 4, 5, 6, 7, 8, 10, 11, 12, and 13 pairs) and submetacentric ( Nos 2, 3 and 9 pairs). That is 10m + 3sm. A pronounced secondary constriction is usually seen in the short arms of No. 7 pair. Chromsomes of No. 3 and 5 pairs carry occasionally a nondistinctive secondary constriction in long arms. No heteromorphic pair is detected either in males or females.It is considered that the position of secondary constriction of karyotype may be used as to identify the species of ranidae.更多还原