一、前言二十多年来,世界小麦产量无论发达国家,还是发展中国家差不多每年均以3.4%的速度增长.产量的增加与采用先进的集约栽培措施有关.然而,多数情况下,只有同时采用半矮秆品种,产量的显著增加才会成为可能.半矮秆品种具有坚硬的茎秆,收获前不易发生茎折和倒伏,有利于机械收割,也可避免伴随倒伏而引起籽粒加工品质的降低. I. INTRODUCTION For more than two decades, world wheat production has grown at an average annual rate of 3.4%, both in developed and developing countries, and the increase in production is related to the adoption of advanced intensive cultivation practices. However, in most cases, The use of semi-dwarf varieties, a significant increase in production will be possible. Semi-dwarf varieties with hard stems before harvest is not prone to stem collapse and lodging, is conducive to mechanical harvesting, but also to avoid the accompanying lodging caused by grain processing quality reduce.