黄芪复合体（豆科）核型研究补充材料

本文首次报道了民和黄芪的染色体数目及核型。发现该种与黄芪复合体其它类群的染色体数目相同，但核型有别，其核型公式为２ｎ＝１６＝８ｍ（２ＳＡＴ）＋８ｓｍ。这种核型变异与它的形态变异一致。在黄芪复合体内，每一类群的染色体至少具１对随体，且附着在最后１对染色体的短臂上（除蒙古黄芪具２对随体外），而Ｔｏｈ（１９７１）报道采自Ｋｙｕｎｇｉ和Ｍｔ．Ｈａｒｌａ膜荚黄芪和高山膜荚黄芪（新拟）的染色体不具随体，可能观察有误。

AN ADDITIONAL NOTE ON KARYOTYPE ANALYSIS OF ASTRAGALUS PENDULIFLORUS COMPLEX(FABACEAE)LAM.

The chromosome number and karyotype of Astragalus minhensis X.Y.Zhu et C. J. Chen are reported for the first time in this peper.It was found to have the same chromosome number as other members of Astragalus penduliflorus Lam. complex,but inconsistent with the other's karyotypes.Its karyotype formula is 2n=16=8m(2SAT)+8sm,which belongs to 2A type.This kind of karyotypic variations is in accordance with its morphological variations.Within the complex,each taxon should have at least a pair of satellites attached to the short arms of the last pair of chromosomes, but Toh's report on A. membranaceus and A.membranaceus var.alpinus(1971),which have not a pair of satellites attached to the same short arms as above,may be observed incorrectly.