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利用赤霉酸不敏感性作为矮秆基因的遗传标记，通过系谱分析和基因等位性测验，认定了我国７６个优良矮秆小麦品种或材料的赤霉酸不敏感矮秆基因。主要结果如下：（１）在所认定的７６个品种中，Ｒｈｔ１基因型的１６个，占２１％；Ｒｈｔ２基因型的５５个，占７２％；Ｒｈｔ１＋Ｒｈｔ２基因型的５个，占７％。表明我国优良矮秆小麦遗传资源中，Ｒｈｔ２基因型占绝对优势，Ｒｈｔ１基因型次之，Ｒｈｔ１＋Ｒｈｔ２基因型较少。（２）Ｒｈｔ１基因型遗传资源主要分布在河南、陕西和河北等省；Ｒｈｔ２基因型遗传资源以山东最多，河北、河南和北京次之，其它省较少。（３）Ｒｈｔ２基因在生产上的累计推广面积为Ｒｈｔ１的２倍；Ｒｈｔ１基因在生产上的累计推广面积以河南最多，安徽、江苏和陕西次之，其它省较少；Ｒｈｔ２基因以山东累计推广面积最大，河南次之，江苏也有较大面积，其它省较少。但它们的利用与育种密切相关。因此，Ｒｈｔ１和Ｒｈｔ２在我国的利用可能没有特殊的地域性。
The gibberellic acid-insensitive dwarfing genes of 76 elite dwarf wheat cultivars and materials in China were identified by using the insensitivity of gibberellic acid (GA) as the genetic marker of dwarfing genes and by pedigree analysis and gene allelicity test. The main results are as follows: (1) Among the 76 identified varieties, 16 of Rht1 genotypes accounted for 21%, 55 of Rht2 genotypes accounted for 72% and 5 of Rht1 + Rht2 genotypes accounted for 7%. The results showed that the Rht2 genotype had the absolute advantage in the fine dwarf wheat genetic resources in China, followed by Rht1 genotype and Rht1 + Rht2 genotype. (2) The Rht1 genotypes were mainly distributed in Henan, Shaanxi and Hebei provinces. Rht2 genotypes were the most in Shandong, Hebei, Henan and Beijing, but less in other provinces. (3) The accumulated popularized area of Rht2 gene in production was twice that of Rht1; the accumulated popularized area of Rht1 gene was the largest in Henan, Anhui, Jiangsu and Shaanxi, while the other provinces were less; Rht2 gene was promoted in Shandong The area is the largest, followed by Henan, Jiangsu also has a larger area, less in other provinces. However, their utilization and breeding are closely related. Therefore, the utilization of Rht1 and Rht2 in our country may not have special regional characteristics.