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Two new karyotypes and bandings in Microtus mandarinus faeceus (Rodentia)
Huanmin Liu1, Nan Yan, Bicai Zhu
1College of Life Science, Xuzhou Normal University, Xuzhou, P. R. China.
Abstract:
Here we report our study on two new karyotypes and C-bandings of M. m. faeceus. Our study shows that there are polymorphisms in the X chromosome of M. m. faeceus (Rodentia), which exibitsubtelocentric X(ST), metacentric X(M) and submetacentric X(SM) patterns, respectively. One new karyotype formula is: 2n = 49 = 4sm + 42t + 1m + XX (sm,sm), and the sex chromosomes are: X(M) X(SM); The other new karyotype formula is: 2n = 50 = 4sm + 43t + 1m + XX (sm,sm), and the sex chromosomes are: X(SM)X(SM). One C-banding karyotype formula is: 2n = 49 = 4sm + 44t + X(st)0, and the sex chromosome is: X(ST)O and the other C-banding karyotype formula is: 2n = 50 = 4sm + 44t + XY(m,t), and the sex chromosomes are: X(M) Y.
