Zoological Research ›› 2018, Vol. 39 ›› Issue (5): 348-355.doi: 10.24272/j.issn.2095-8137.2018.054

Special Issue: Mammals Genetics & evolution

• Articles • Previous Articles     Next Articles

Karyotypes of field mice of the genus Apodemus (Mammalia: Rodentia) from China

Masaharu Motokawa1,*, Yi Wu2, Masashi Harada3, Yuta Shintaku4,5, Xue-Long Jiang6, Yu-Chun Li7,*   

  1. 1 Kyoto University Museum, Kyoto University, Kyoto 606-8501, Japan
    2 Key Laboratory of Conservation and Application in Biodiversity of South China, School of Life Sciences, Guangzhou University, Guangzhou Guangdong 510006, China
    3 Laboratory Animal Center, Graduate School of Medicine, Osaka City University, Osaka 545-8585, Japan
    4 Wildlife Research Center, Kyoto University, Sakyo, Kyoto 606-8203, Japan
    5 Japan Monkey Centre, Inuyama, Aichi 484-0081, Japan
    6 Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming Yunnan 650223, China
    7 Marine College, Shandong University (Weihai), Weihai Shandong 264209, China
  • Online:2018-09-18 Published:2018-07-13
  • Contact: Masaharu Motokawa,Yu-Chun Li,E-mail:motokawa.masaharu.6m@kyoto-u.ac.jp; li_yuchun@sdu.edu.cn E-mail:motokawa.masaharu.6m@kyoto-u.ac.jp; li_yuchun@sdu.edu.cn
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Abstract: Karyotypes of four Chinese species of field mice of the genus Apodemus were examined, including Apodemus chevrieri (diploid chromosome number, 2n=48, fundamental number of autosomal arms, FNa=56), A. draco (2n=48, FNa=48), A. ilex (2n=48, FNa=48), and A. latronum (2n=48, FNa=48). Karyotypes of A. chevrieri, A. draco, and A. ilex are reported here for the first time, providing useful information for their species taxonomy. Determining the karyotypes of all species of Apodemus in Asia, both in this and previous studies, provides a solid overview of the chromosome evolution and species differentiation of the genus in East Asia. In addition to allopatric speciation, chromosome rearrangements likely played an important role in the formation of the four Apodemus species groups as well as speciation within each group in East Asia. For example, increased centromeric heterochromatin in A. latronum may have contributed to the post-mating reproductive isolation from the A. draco-A. ilex-A. semotus clade.

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