title: Two new karyotypes and bandings in Microtus mandarinus faeceus (Rodentia).
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.
authors.affiliation: College of Life Science, Xuzhou Normal University, Xuzhou, P. R. China.
authors.forename: Huanmin
authors.initials: H
authors.lastname: Liu
authors.forename: Nan
authors.initials: N
authors.lastname: Yan
authors.forename: Bicai
authors.initials: B
authors.lastname: Zhu
mesh_terms: D000818:Animals; D003411:Arvicolinae / Q000145:classification / Q000235:genetics*; D002871:Chromosome Banding; D005260:Female; D007621:Karyotyping; D008297:Male; D011110:Polymorphism, Genetic / Q000235:genetics*; D012730:Sex Chromosomes / Q000235:genetics*