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用双生苗品系ＡＰⅢ和ＡＰⅣ衍生的单生苗（ＡＰⅢ①、ＡＰⅣ①）和双生苗（ＡＰⅢ②、ＡＰⅣ②）植株与常规品系皖９０２４和０２４２８组配成１２个正反交组合，用不同ＡＰ编号互配成６个杂交组合，对１８个组合的亲本及Ｆ＿１、Ｆ＿２和从其中的１４个杂交组合Ｆ＿２双生苗植株衍生的Ｆ＿３株系的双生苗发生进行了观察。结果表明，ＡＰⅢ和ＡＰⅣ的双生苗特性是一种可遗传的隐性性状，但其遗传表达较为复杂，表现为从双生苗亲本中可衍生出单生苗和双生苗，而衍生的单生苗也可产生两种类型；从ＡＰ编号与常规品系杂交的Ｆ＿２中重组获得的双生苗，在Ｆ＿３表达程度随组合、株系而异，从不表达至高于双生苗亲本。对双生苗特性遗传复杂的原因进行了初步分析。
The two elite seedlings derived from APⅢ and APⅣ, APⅢ①, APⅣ① and APⅢ② and APⅣ②, were crossed with conventional lines Anhui 9024 and 02428 to form 12 reciprocal crosses with different AP numbers Six hybrid combinations were used to study the twin emergence of F_3 lines derived from 18 combinations of F_1 and F_2 and F_2 twin plants from 14 cross combinations. The results showed that the twin seedling trait of APⅢ and APⅣ was a heritable recessive trait, but its genetic expression was rather complicated. Single and twin seedlings could be derived from twin parents, while the derived single seedlings Two types of diploid seedlings could also be produced. The F_3 twinning seedlings obtained from recombinant F_2 hybridized with AP lines were different in combination and lines, and never expressed higher than that of twin parents. The reasons for the complex inheritance of twin seedlings were analyzed preliminarily.