摘 要 ：作者对10种菊科花卉进行了染色体数目的观察,并对其中8种进行了核型分析。结果如下:翠菊(Callistephus chinensis Nees) 2n=18=18m (4SAT);麦秆菊(Helichrysum bracteatum Andr.)2n=24=18m+6sm;蛇目菊(Coreopsis tinctoria Nutt.) 2n=24=16m+8sm (2SAT);黑心菊(Rudbechia hirta L.) 2n=76;肿柄菊(Tithonia diversifolia A. Gray) 2n=34=24m(4SAT)+10sm (2SAT);大丽花(Dahlia pinnata Cav.) 2n=64;硫华菊(Cosmos sulphureus Cav.) 2n=24=2sm+22st;万寿菊(Tagetes erecta L.) 2n=24=6sm+16st(2SAT)+2t;天人菊(Gaillardia pulchella Foug.) 2n=34=22m+12sm;矢车菊(Centaurea cyanus L.) 2n=24=2sm+16st+6t(2SAT)。
Abstract:This paper reports the chromosome numbers of 10 species of Compositae and the karyotypes of 8 of them They are: Callistephus chinensis 2n=18=18m(4SAT); Helichrysum bracteatum 2n=24=18+6sm;Coreopsis tinctoria 2n=24=16+8sm(2SAT); Rudbechia hirta 2n=76;Tithonia diversifolia 2n=34=24m(4SAT)+10sm(2SAT); Dahlia pinnata 2n=64; Cosmos sulphureus 2n=24=2sm+22st; Tagetes erecta 2n=24=6sm+16st(2SAT)+2t; Gaillardia pulchella 2n=34=22m+12sm;Gentaurea cyanus 2n=24=2sm+16st+6t(2SAT).