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陆地棉科遗２号×中棉完紫的种间杂交衍生后代群体中分离出一株矮秆小叶突变体，经多年选择育成了矮早棉１号。在北京气候条件下，矮早棉１号成熟时，株高只有４５ｃｍ，不到正常陆地棉的１／２。遗传分析揭示矮早棉１号的矮化早熟特性系由两对隐性基因控制，其基因符号定名为ｄ_１和ｄ_２，矮早棉１号为双隐性纯合子，基因型为ｄ_１ｄ_１ｄ_２ｄ_２。正常陆地棉ＴＭ－１、中棉所１２及中棉所１６均为显性纯合子，基因型为Ｄ_１Ｄ_１Ｄ_２Ｄ_２。控制棉花株高的两对基因Ｄ_１／ｄ_１和Ｄ_２／ｄ_２间表现重叠作用。矮早棉１号在棉花早熟育种中有重要价值。
One cotton dwarf leaflet mutant was isolated from the interspecific hybrid derived offspring of Upland cotton × Kemianyuan 2 × Zhongmiandian violet. After several years of selection, Dwarrant Gum No.1 was bred. Under the Beijing climate conditions, when the short morning cotton 1 matured, the plant height was only 45cm, less than 1/2 of normal upland cotton. Genetic analysis revealed that the dwarfing early maturity characteristics of Dianchangmian 1 were controlled by two pairs of recessive genes. The gene symbols were named as d_1 and d_2. The short recessive cotton No.1 was double recessive homozygote and the genotype was d_1d_1d_2d_2. The normal land cotton TM-1, China cotton 12 and China cotton 16 were dominant homozygotes, genotype D_1D_1D_2D_2. Two pairs of genes controlling cotton plant height overlapped between D_1 / d_1 and D_2 / d_2. Short morning cotton 1 has important value in cotton precocious breeding.