以流式细胞仪分离小麂(Muntiacus reevesi)Y染色体和黑麂(Muntiacus crinifrons)Y1,Y2,X+4和1号染色体,利用DOP-PCR技术富集了分离的各单条染色体。然后,将小麂的Y染色体的DOP-PCR产物经Cy3标记后直接作为涂染探针, 应用染色体涂染技术与雌雄黑麂的核型标本进行杂交,确认了黑麂真正的Y染色体为Y2染色体。再以黑麂的Y1,Y2,X+4和1号染色体的DOP-PCR产物为模板,用人的特异性的 SRY（sex determining region of the Y chromosome ） 基因引物对其进行扩增,结果表明黑麂只有Y2染色体出现了SRY扩增片段。然后扩增产物克隆和测序,比较它与人的同源性,初步把黑麂的Sry基因定位在Y2染色体上。最后提取雄性黑麂的基因组DNA,并用同一对引物对其进行扩增,亦得到Sry基因的片段,对此扩增片段进行克隆,测序,结果表明其与Y2染色体得到的Sry基因片段完全一样，与人SRY基因的同源性均为83%。
Comparing to its sister-family （Rhinolophidae）, Hipposideridae was less studied by cytogenetic approaches. Only a few high-resolution G-banded karyotypes have been reported so far, and most of the conclusions on the karyotypic evolution in Hipposideridae were based on conventional Giemsa-staining. In this study, we applied comparative chromosome painting, a method of choice for genome-wide comparison at the molecular level, and G- and C-banding to establish comparative map between five hipposiderid species from China, using a whole set of chromosome-specific painting probes from one of them （Aselliscus stoliczkanus）. G-band and C-band comparisons between homologous segments defined by chromosome painting revealed that Robertsonian translocations, paracentric inversions and heterochromatin addition could be the main mechanism of chromosome evolution in Hipposideridae. Comparative analysis of the conserved chromosomal segments among five hipposiderid species and outgroup species suggests that bi-armed chromosomes should be included into the ancestral karyotype of Hipposideridae, which was previously believed to be exclusively composed of acrocentric chromosomes.
