在60年代及70年代初,国家实验站和几家商业种子公司,就开始在美国小麦种植区进行杂交麦的研究。在大学里,这类探索性的研究大多与育种计划联系在一起,作为理科硕士、哲学博士的论题进行研究。选育亲本复杂,杂交小麦商品化耗资太大,所以国家实验站减弱了培育杂交小麦的力量。在美国,除了北达科塔州大学的研究项目和几个州就小麦某些特殊问题进行试验外,几乎所有的杂交小麦育种的研究试验,都由商业性种子公司和化学公司进行,然而各州的产量试验提供了杂交小麦与常规小麦对比资料。杂交小麦的育种研究主要是在中部和南部大平原地区的硬粒红皮冬小麦上进行,也有一些在中西部的软粒红皮冬小麦区和北部大平原的硬粒红皮春小麦区进行的。它主要集中在硬粒红皮小麦的原 In the 1960s and early 1970s, the National Experimental Station and several commercial seed companies began researching the hybrid wheat in the wheat growing areas of the United States. At university, most of these exploratory studies are linked to breeding programs and studied as a subject for MSc, Ph.D. Breeding parents complex, commercialization of hybrid wheat cost too much, so the national experimental station weakened the power to cultivate hybrid wheat. In the United States, in addition to research projects at the University of North Dakota and several states testing specific problems with wheat, almost all research trials of hybrid wheat breeding have been conducted by commercial seed companies and chemical companies, however, The yield test provides a comparison of conventional wheat and conventional wheat. Breeding of hybrid wheat is mainly carried out on hardy red winter wheat in the central and southern Great Plains and some in the soft red winter wheat area in the Midwest and the hard red spring wheat area in the northern Great Plains. It is mainly concentrated in the original Durian wheat