THE KARYOTYPE ANALYSIS OF MICHELIA (MAGNOLIACEAE) IN CHINA
中国含笑属核型分析

Karyotypes of 12 species of Michelia in the Magnoliaceae were studied. Their karyotype formulas are: M. macclurei var. sublanea 2n=34m(2SAT) 4sm; M. alba 2n=34m 4sm; M. floribunda 2n=30m 8sm; M. champaca 2n=32m 6sm; M. shiluensis 2n=32m 6sm; M. platypetala 2n=32m 6sm(2SAT); M. figo 2n=32m 6sm; M. maudiae 2n=32m 6sm; M. longistamina 2n=32m 6sm; M. foveolata 2n=34m 4sm;M. skineriana 2n=30m 8sm;M. wilsonii 2n=30m 8sm(2SAT). All the species are of the symmetrical karyotype. The karyotypes all belong to 2A type except that of M. floribunda which is of 1A type. Due to the karyotype similarity among species, the karyotype data in Michelia may be hardly useful for infrageneric taxonomy.