Characterization of a Q-banded karyotype of a crossbred bull

Abstract

With the objective of characterizing the Q-banding pattern of cattle chromosomes, peripheral blood lymphocyte metaphase chromosomes of a bull calf (Bos indicus x Bos taurus L.) were studied using quinacrine fluorescence banding technique. A karyotype of the Q- banding pattern of bovine chromosomes, together with a diagrammatic representation and a complete diploed cell is presented. The haploid set of metaphase chromosomes showed 125 positive bands. A detailed description of the positive bands were given in the idiogramme, providing accurate description of the banding pattern on individual chromosomes of this species. This technique is simple and reproducible and can be used in routine chromosome analysis.