摘 要 ：首次报道了5种国产沙参属（Adenophora）植物的染色体数目和核型。北方沙参A．borealis Hong et Y．Z．Zhao的核型公式为 2n=34=28m＋4sin（2sat）＋2st(2sat); 雾灵沙参 A．wulingshanica Hong 的核型公式为 2n=34=26m（4sat）＋6sm＋2st或2n=34＋1B=26m（4sat）＋6sm＋2st＋1B；秦岭沙参 A.peliolata Pax et Hoffm．的核型公式为2n=34=26m（2sat）＋6sm＋2st或 2n=34＋1B=26m（2sat）＋6sm＋2st＋1B；裂叶沙参 A．loboPhylla Hong的核型公式为2n=34=26m＋4sm（2sat）＋4st或2n=34＋2B=26m＋4sm（2sat）＋4st＋2B。泡沙参 A．otaninii Korsh的核型公式为 2n=34-28m（2sat）＋4sm＋2st。它们同以往报道的其它种的核型相似：以中部着丝点染色体（m）为主，至少具一对近端着丝点染色体（st）和一对随体染色体，核型的对称程度较高，着丝点端化值（T.C）为58.4％～62.0％。结合其它性状，讨论了裂叶沙参的特殊性。
Abstract:In this paper, chromosome numbers and karyotypes of five species of Adenophora are reported for the first time. The species under study are native to China. The results are as follows: 2n= 34= 28m+4sm(2sat)+2st(2sat) for A. borealis; 2n= 34= 26m(4sat)+6sm+2st or 2n = 34+1 B = 26m (4as t)+6 sm+2 st+ 1B for A. w ulingshanica; 2n = 34 = 26m (2sat)+6sm+2st or 2n = 34+1B = 26m (2 sat)+6 sm +2 st+ 1B for A. petiolata, 2n = 34 = 26m+4sm (2 sat)+4 st or 2n= 34+2B = 26m+4st(2sat)+4st+2B for A. lobophylla; 2n= 34= 28m(2sat)+4sm+2st for A. potaninii. The karyotypes of these species are consistent with those of the species previously re-ported. The chromosomes are small, with the majority of them being "m" ones; and a pair of sat-chromosomes and a pair of " st" chromosomes are always present. The centromeric terminalization value of chromosomes is 58.4%~ 62.0%, which shows high symmetry of karyotpyes in this genus. The special karyotype of A.lobophylla. together with its morphological characters, suggests that it is more advanced than the other species and its position is dicussed.