五种珍珠菜的核型研究

本文对５种珍珠菜亚属植物进行了染色体数目及核型研究。其中瓣珍珠菜２ｎ＝２４＝１２ｍ＋８ｓｍ＋４ｓｔ（２ＳＡＴ）、黑腺珍珠菜２ｎ＝２２＝２ｍ＋４ｓｍ＋６ｓｔ＋１０ｔ、泽珍珠菜２ｎ＝２４＝１４ｍ＋６ｓｍ（２ＳＡＴ）＋４ｓｔ和小叶珍珠菜２ｎ＝４８＝３４ｍ＋１０ｓｍ＋４ｓｔ的染色体数目及核型为首次报道。中国九江产的红根草核型２ｎ＝２４＝２０ｍ＋４ｓｍ（２ＳＡＴ）与日本产的核型２ｎ＝２４＝１８ｍ（１ＳＡＴ）

Study on the Karyotypes of Five Species in Subgen. Palladia(Lysimachia) from China

In the present paper,karyological studies were carried out in five species of Subgen. Palladia (Lysimachia) from China, of which the chromosome numbers and the karyotypes of the four species are first reported,which are: Lysimachia glanduliflora Hanelt 2n=24=12m 8sm 4st(2SAT), Lysimachia heterogenea Klatt 2n=22=2m 4sm 6st 10t, Lysimachia candida Lindl. 2n=24=14m 6sm(2SAT) 4st and Lysimachia parvifolia Franch. 2n=48=34m 10sm 4st. The karyotype of Lysimachia fortunei Maxim from Jiujiang of China (2n=24=20m 4sm(2SAT)) is somewhat different from that from Japan (2n=24=18m(1SAT) 6sm(SAT)). The four sections with nine species in the Subgen. Palladia (Lysimachia) were also cytologically analysed in the paper. The result shows that in the four sections,Sect. Spicatae has the most symmetrical karyotype,Sect.Lubinia has the most asymmetrical karyotype ,and Sect.Candidae is between the fomer two sections, but Sect. Miltandrae has various kinds of the karyotypes including the former three sections.