关键词: 长爪沙鼠, 染色体

Abstract: Objective In order to collect the whole data about G band in chromosomes of Mongolian gerbils for cytogenetics through studying the G band from the first to the fifth chromosomes which are easily differentiated of Mongolian gerbils. Methods\ The peripheral blood was taken from the gerbils(3 males and 3 females) for lymphocyte culture.Slices were gained for the lymphocytes in the metaphase of cell division and dealed with trypsine.Then the stained samples were selected for observation.Result\ The exponent of chromosome of Mongolian gerbils showed the first chromosome and the second chromosome have 8 fuscous bands which could be differentiated by location of centromere each.The third chromosome had 6 fuscous bands which located near the centromere and far extremity of middle part in the long arm and short arm.The forth chromosome and the fifth chromosome had 4 fuscous bands each,and fuscous bands in the short arm of the fifth chromosome which could be differentiated lies in one side of centromere.Conclusion\ The first to the fifth chromosomes of Mongolian gerbils have basic specific fuscous G bands which can become important signs for compartmentalizing the chromosome band.

Key words: Mongolian gerbils, Chromosome, G band