在相似条件下饲养的三个不同品种牛的染色体中的姐妹染色单体交换。

Sister chromatid exchange in chromosomes of cattle from three different breeds reared under similar conditions.

作者信息

Iannuzzi L, Di Meo G P, Perucatti A, Ferrara L, Gustavsson I

机构信息

CNR-Institute on Adaptation of Cattle and Buffalo, Southern Italy Environment (I.A.B.B.A.M.), Naples.

出版信息

Hereditas. 1991;114(3):201-5. doi: 10.1111/j.1601-5223.1991.tb00325.x.

DOI:10.1111/j.1601-5223.1991.tb00325.x

PMID:1960099

Abstract

A homogeneous group (same sex, age and environmental conditions) of 35 Italian cattle of the Podolian, Friesian, and Romagna breeds was investigated concerning the spontaneous incidence of sister chromatid exchange (SCE). The mean values of SCEs/cell were 7.9 +/- 3.4, 7.1 +/- 3.3, and 7.3 +/- 3.2 in the Podolian, the Friesian, and the Romagna breeds, respectively, with significant differences between the Podolian and the Friesian breeds. Simultaneous disclosure of SCEs and fluorescent G-bands in the lighter chromatid made possible the identification of chromosome 1, in addition to the biarmed X and Y chromosomes. The inter-chromosomal SCE-distribution revealed a nonrandom pattern due to significantly increased values of SCEs in chromosomes 1 and X, particularly in the Romagna breed.

摘要

对35头意大利波多利牛、弗里西亚牛和罗马涅牛组成的同质群体（相同性别、年龄和环境条件）进行了姐妹染色单体交换（SCE）自发发生率的调查。波多利牛、弗里西亚牛和罗马涅牛的SCEs/细胞平均值分别为7.9±3.4、7.1±3.3和7.3±3.2，波多利牛和弗里西亚牛品种之间存在显著差异。除了双臂X和Y染色体外，在较浅染色单体中同时显示SCEs和荧光G带使得能够识别1号染色体。染色体间SCE分布显示出非随机模式，因为1号染色体和X染色体上的SCE值显著增加，特别是在罗马涅牛品种中。