发现水稻节间伸长的eui新基因及其高秆隐性种质的多型性，育成长穗颈的雄性不育系，组配成e(eui)-杂交稻，并已进入生产应用。e-杂交稻研究和发展的目标是：减少杂交稻种子生产中50%～90%的赤霉素用量，并提高种子产量和质量；杂交稻增产，同时减少杂交稻种植的氮肥用量。已克隆分离出EUI1，EUI2基因，并获得该突变基因碱基缺失多样性的材料，将为植物生长发育，GA代谢激素与杂种优势，以及基因突变的分子机理和植物基因工程的研究提供材料和机遇。

The eui gene of rice and the diversity of tall recessive germplasm of rice were newly identified. Male sterile lines with elongated uppermost internode, and their corresponding hybrids (-hybrids) possessing eui gene were developed and released. The goals and the target of -hybrid rice research and development are： to cut short dosage of GA3 used in hybrid rice seed production by 50%～90% with increasing seed yield and improving seed quality; to increase hybrid rice yield with decreasing N-fertilizer applied to rice.

The EUI1， EUI2 were isolated, and the diversity showing nucleotide deletion of euil and eui2 were also identified This will provide the materials to enhance the studies on following area： plant growth and development, GA melabolism, growth hormones and heterosis, molecular mechanism of mutation, as well as gene engineering.