长鬣蜥的染色体组型和减数分裂联会复合体的研究  

Studies of Mitotic Chromosomes and Meiotic Synaptonemal Complex of Physignathus cocincinus (Reptilia)

作　　者：王蕊芳[1] 贺维顺[1] 陈佺 施立明[1] 

机构地区：[1]中国科学院昆明动物研究所,650107

出　　处：《Acta Genetica Sinica》1993年第3期211-215,共5页

摘　　要：本文报道长鬣蜥(Physignathus cocincinus)有丝分裂染色体及C-,Ag-带以及减数分裂联会复合体核型。染色体数2n=36,NF=48,核型组成为12V+24m(V为双臂大染色体,其中No.2为亚中着丝粒染色体,m为微小染色体)。结构异染色质主要分布在小染色体上。一对Ag-NORs分布于第2对亚中着丝粒染色体末端。C-, Ag-banded mitotic chromosomes and synaptonemal complex (SC) of Physignathus co-cincinus are reported in this paper. The diploid chromosome number is 2n = 36(12V + 24m, V is used for metacentric and submetacentric chromosome of the macrochromosome, m for mi-crochromosome), NF = 48. The C-bands locate mainly on all of the microchromosomes. A pair of NORs is distributed on the terminal of No.2 submetacentric chromosome.The different stages of meiosis in Physignathus cocincinus gonads are reported. A micro-spreading synaptonemal complex from spermatocytes is studied by electron microscopy. The SC karyotype of the Physignathus cocincinus with 18 bivalents has been constructed.

关 键 词：染色体组型 长鬣蜥 减数分裂 

分 类 号：Q959.620.3[生物学—动物学]