两个成熟期不穗发芽、籽粒α－淀粉酶水平始终保持很高的小麦品种与一个低α－酶的对照品种杂交，其Ｆ１、Ｆ２和ＢＣ１代分别种植，收获后对各群体籽粒分别进行α－淀粉酶活性分析．结果表明，高水平籽粒α－淀粉酶的分离和重组受一个隐性等位基因控制，这种遗传方式使得很难把低活性的α－淀粉酶纯合个体与杂合个体（低活性α－淀粉酶表现型，但带有高活性基因）区分开来，并且这一遗传方式对小麦育种家有着十分重要的意义．这一称之为后熟α－淀粉酶的遗传基因并不与位于６Ｂ染色体长臂上的有芒抑制基因Ｂ２连锁在一起。 Two sprouting cultivars with no sprouting at maturity, the wheat varieties with consistently high α-amylase activity were crossed with a low α-enzyme control cultivar. The F1, F2 and BC1 generations were planted separately. After harvest, Alpha-Amylase Activity Assay. The results showed that the isolation and recombination of high-level grain alpha-amylase was controlled by a recessive allele, a genetic approach that made it very difficult to homogenize low activity alpha-amylase homozygous individuals with heterozygous individuals (low activity alpha- Amylase phenotype, but with highly active genes), and this genetic approach is of great importance to wheat breeders. The gene, known as the late-maturing alpha-amylase, is not linked to the Amaranthin B2, which is located on the long arm of chromosome 6B.