以大拇指矮(Tom Thumb)为矮源,通过杂交和连续回交育成了显性矮秆系及其不育系。不育系矮化对育性的恢复没有不良影响,也不影响繁殖和制种。用显性矮秆不育系配制的杂种,F_1株高接近中亲值。讨论了显性矮秆同型系的株型松散、叶片宽而深绿和抗病性差等问题,这些性状须进一步改良。大拇指矮成熟后期籽粒内α-淀粉酶活性低的特性,可能用于改进T型不育系的种子质量和杂种小麦面粉的加工品质。 With dwarf source Tom Thumb, dominant dwarf lines and their CMS lines were formed by crossing and continuous backcrossing. Dwarfing of sterile lines has no adverse effect on fertility restoration and does not affect reproduction and seed production. F1 hybrids with Dominant Dwarf CMS lines were close to the middle value. The dominant dwarf isoforms were discussed with loose plant type, wide and dark green leaves and poor disease resistance. These traits should be further improved. The low-alpha-amylase activity of the thumb late maturing grain may be used to improve the seed quality of the T-type CMS and the processing quality of the hybrid wheat flour.