Scavone M D, Oliveira C, Trinca L A, Foresti F
Departamento de Morfologia, Instituto de Biociências, Universidade Estadual Paulista, Botucatu, São Paulo, Brazil.
Cytobios. 2001;105(408):55-63.
The synaptonemal complex (SC) of specimens of Bos taurus taurus from the Holstein-Friesian, Piemontese, and Simmental breeds, was analysed. The analysis included quantification of the frequency of various types of abnormalities in the SC, and the frequency of cells with SC abnormalities. All animals had 29 autosomal bivalents and one sexual bivalent and the most frequently recorded abnormality was pairing failure. The number of cells with abnormalities in the Holstein-Friesian breed was 29.41%, in the Piemontese breed was 30.00% and in the Simmental breed it was 29.54%. The subspecies Bos taurus taurus had 29.63% of cells showing abnormalities with 57.33% of these abnormalities occurring in zygotene and 42.67% occurring in pachytene. Statistical analyses showed that there were no significant differences in the number of cells with SC abnormalities among the breeds studied. The frequency of cells with abnormalities, and the efect on the fertility of the Holstein-Friesian, Piemontese and Simmental breeds are discussed.
对来自荷斯坦-弗里生、皮埃蒙特和西门塔尔品种的原牛标本的联会复合体（SC）进行了分析。分析包括对SC中各种异常类型的频率以及具有SC异常的细胞频率进行量化。所有动物均有29对常染色体二价体和一对性二价体，最常记录到的异常是配对失败。荷斯坦-弗里生品种中具有异常的细胞数量为29.41%，皮埃蒙特品种为30.00%，西门塔尔品种为29.54%。原牛亚种有29.63%的细胞显示异常，其中57.33%的异常发生在偶线期，42.67%发生在粗线期。统计分析表明，在所研究的品种中，具有SC异常的细胞数量没有显著差异。讨论了具有异常的细胞频率以及对荷斯坦-弗里生、皮埃蒙特和西门塔尔品种生育力的影响。
