constriction

The secondary constrictions appear on the chromosomes of No.

但是作者发现牛蛙骨髓细胞的第7、8、10、12号染色体上均有次缢痕。

The results demonstrate that different samples have the same karyotype,2n=26(5L+0M+8S),NF=52,and the secondary constriction locates on 6p.

结果表明,3地的泽蛙核型均为2n=26(5L+0M+8S),NF=52,染色体次缢痕均出现在6p上。

① The karyotype,secondary constriction and Ag-NORs of the topotypes of Polypedates dugritei were reported the first time.

本文选择宝兴泛树蛙模式标本产地四川宝兴居群(背部有斑点和无斑点两种类型)、大瓦山居群、瓦屋山居群,也选择了被命名为昭觉泛树蛙的模式标本产地四川昭觉的居群,共两种泛树蛙4个居群的5类52号标本,进行染色体组型、次缢痕及Ag-NORs研究。