安徽黄精和琅琊黄精核型初步研究

本文对黄精属（Ｐｏｌｙｇｏｎａｔｕｍ Ｍｉｌｌ．）中安徽特有２种植物的核型进行了初步研究，并分别人近缘种的核型进行了比较。结果表明：安徽黄精（Ｐ．ａｎｈｕｉｅｎｓｅ）核型公式为２ｎ＝２４＝４ｍ＋６ｓｍ＋１２ｓｔ＝２Ｔ，属３Ｂ核型，染色体相对长度组成为２ｎ＝２４＝６Ｌ＋６Ｍ２＋６Ｍ１＋６Ｓ．琅琊黄精（Ｐ．ｌａｎｇｙａｅｎｓｅ）核型公式为２ｎ＝１８＝１０ｍ＋２ｓｍ＋６ｓｔ，属２Ｂ核型；染色体相对长度组

PRELIMINARY STUDY OF THE KARYOTYPE OF POLYGONATUM ANHUIENSE AND P.LANGYAENSE

In the present paper,the karyotypes of 2 endemic species to Anhui Province in Polygonatum Mill.are reported,and they are separately compared with the ones of their intimate species. The results are shown as follows:(1) The karyotypic formula of P.anhuiense D.C.Zhang et J Z.Shao is 2n = 24 = 4m + 6sm + 12st + 2T. The karyotype belongs to 3B type of Stebbins'( 1971)karyotypic asymmetry. The chromosome complement .is 2n = 24 = 6L + 6M2 + 6M1 + 6S according to the standard defined by Kuo et al.(1972).(2)The karyotypic formula of P. langyaense D.C. Zhang et J.Z.Shao is 2n= 18= 10m+ 2sm + 6st. The karyotype belongs to 2B type of Stebbins', which is reported for the first time to this species. The chromosome complement is 2n= 18=2L+8M2+4M1+4S according Kuo's standard. Based on the karyotypic comparison with intimate species,it seems that P.anhuiense is more advanced than P. sibiricum Delar.and P,langyaense is more primitive than P.desoula Kom.