CYTOLOGICAL ANALYSIS OF CHROMOSOMES IN THE 2 SPECIES PARASCARIS-UNIVALENS AND PARASCARIS-EQUORUM
CYTOLOGICAL ANALYSIS OF CHROMOSOMES IN THE 2 SPECIES PARASCARIS-UNIVALENS AND PARASCARIS-EQUORUM
复制标题
DOI：
10.1007/bf00293524
复制
发表时间：
1986-01-01
期刊：
影响因子：
1.6
通讯作者：
PIMPINELLI, S
中科院分区：
文献类型：
--
作者：
GODAY, C;PIMPINELLI, S
用奎尼卡林染色技术、Hoechst 33258染色技术、染色质A3染色技术和C显带技术，对2种单价副蛔虫(2n=2)和4种马副蛔虫(2n=4)的染色体结构和“染色质减少”现象进行了细胞学分析。结果表明：(1)两种植物的染色体在异染色质的位置和类型上都有很大的不同；(2)两种植物都有很强的染色体多态现象，但都是在一个基本的物种特有的表型范围内；(3)在两个不同的胚胎发生阶段，前体细胞中的异染色质都可以被消除，这一过程的结果是产生了核型为2n=60的体细胞。此外，还提供了表明这两个物种之间的杂交是不育的证据。
Chromosome organization and the phenomenon of "chromatin diminution" in the two species Parascaris univalens (2n = 2) and P. equorum (2n = 4) were cytologically analysed by a variety of staining techniques (Quinacrine, Hoechst 33258, Chromomycin A3 and C-banding). The results show that: (1) the chromosomes of the two species differ markedly in both the location and the type of heterochromatin they contain; (2) in both species there is a strong chromosome polymorphism which, however, ranges within a basic species-specific phenotype; (3) the heterochromatin can be eliminated in presomatic cells during early embryogenesis at two different stages and in both cases the consequence of this process is the generation of somatic cells with a 2n = 60 karyotype. Moreover, evidence suggesting the sterility of hybrids between the two species is provided.