利用小麦矮秆基因Ｒｈｔ１，Ｒｈｔ２，和Ｒｈｔ３的不同形式（单个基因或组合）的春小麦近等基因系（以春小麦品种ｃｖ，ＡｐｒｉｌＢｅａｒｄｅｄ为背景，回交转育而成），研究了在半旱薄地上Ｒｈｔ基因对农艺性状的影响。结果为，Ｒｈｔ１和Ｒｈｔ２基因型的产量因子显著大于Ｒｈｔ３，Ｒｈｔ２＋Ｒｈｔ３和Ｒｈｔ１＋Ｒｈｔ２基因型；Ｒｈｔ３矮秆基因显著降低了倒二叶长度和明显加宽了旗叶倒二叶的宽度；Ｒｈｔ２基因明显提高了经济系数；降秆能力：Ｒｈｔ２＋Ｒｈｔ３＞Ｒｈｔ３＞Ｒｈｔ１＋Ｒｈｔ２＞Ｒｈｔ１或Ｒｈｔ２，地上部生物产量与之相反。 The spring wheat proximal isogenic lines with different forms (single genes or combinations) of wheat dwarfing genes Rht1, Rht2, and Rht3 (backcrossed with the spring wheat cultivars cv and April Bearded) were studied. Influence of Aboveground Rht Genes on Agronomic Traits. The results showed that the yield factors of Rht1 and Rht2 genotypes were significantly larger than those of Rht3, Rht2 + Rht3 and Rht1 + Rht2 genotypes; Rht3 dwarf gene significantly reduced the length of the second leaves and widened the width of the second leaves of the flag leaves; Rht2 gene was significantly increased Economic coefficient; descending stalk ability: Rht2 + Rht3> Rht3> Rht1 + Rht2> Rht1 or Rht2, the aboveground biomass yield was the opposite.