| 棕色田鼠的细胞遗传学研究 |
| |
| 引用本文： | 朱必才,徐熠,等.棕色田鼠的细胞遗传学研究[J].遗传学报,1993,20(2):135-140. |
| |
| 作者姓名： | 朱必才 徐熠 |
| |
| 作者单位： | [1]陕西师范大学生物系，西安710062 [2]西安医科大学基础部生物教研室 |
| |
| 摘 要： | 本次首次报告棕色田鼠（Microtus mandarinus)的核型，核型公式为2n=50=2(M,T) 2SM 44T XX(M,SM),XY(SM,ST)，发现第一对常染色体及X性染色体存在多态现象，在所研究的15只雌性个体中有7只雌性个体的细胞只有1条X性染色体，性染色体组成为XO型，核型公式为2n=49=2(M,ST) 2SM 44T＋XO，。其中X性染色体不同于雄性中的X（SM），为M类型，本文提出的综色田鼠3种核型与Brown等人（1964）提出的Microtus oregoni的3种核型（XO，YO，XY）有异，本文还阐述了染色体多态产生的机制和探讨了XO型个体发生的机理及其繁殖。
|
| 关 键 词： | 棕色田鼠 细胞遗传学 田鼠属 |
Cytogenetic Studies of Brown Field-Mouse |
| |
| Zhu Bicai Liu Jiakun Xu Yi Zhang Yuhui Wang Tingzheng.Cytogenetic Studies of Brown Field-Mouse[J].Journal of Genetics and Genomics,1993,20(2):135-140. |
| |
| Authors: | Zhu Bicai Liu Jiakun Xu Yi Zhang Yuhui Wang Tingzheng |
| |
| Abstract: | The karyotype of Brown Field-Mouse (Microtus mandarinus) is reported in this paper. The formula of karyotypes is:2?= 50 = 2(M,T) + 2SM + 44T + XX(M,SM)XY(SM,ST). The first pair of the autosomes and the X-chromosomes show polymorphism. Only one X-chromosome can be found in the seven out of the fifteen female specimens studied. The formula of its karyotypes is 2n = 49 = 2(M,ST)+2SM + 44T + XO. The X-chromosomes of these seven specimens are metacentric, and are different from the X(that is SM) of normal male, these are tha type M. Three kinds of karyotypes of Microtus mandarinus studied in this paper are different from the karyotypes (XO,OY,XY) of M. oregoni siudied by Brown et al. (1964). The mechanism of generation of chromosomal polymorphism is discussed. Individual ontogenesis mechanism of the type XO and its reproduction are also discussed. |
| |
| Keywords: | Microtus mandarinus Polymorphism Karyotype G-banding pattern |
| 本文献已被 CNKI 维普 等数据库收录！ |
|
