1987～1988年,以16个菊花品种配制成12个杂交组合,研究了花、茎、叶的若干性状在F_1代的表现。结果表明,1.所有被研究的性状在F_1代都发生了广泛的分离,这意味着无性繁殖使亲本品种保持着高度的杂合性;2.F_1杂种的花色 From 1987 to 1988, 12 cross combinations were made from 16 chrysanthemum varieties, and the performance of several traits of flowers, stems and leaves in F 1 generation was studied. The results showed that: 1. All the traits studied were widely separated in F1 generation, which means that asexual reproduction maintained a high degree of heterozygosity for the parental varieties;