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杂种优势是指两个遗传性不同的亲本杂交产生的杂种F_1代优于双亲的现象。人们在生产上利用杂种优势先后创造了杂交玉米、杂交高粱、杂交水稻和杂交油菜等,这为大幅度地增加其产量做出了巨大贡献。小麦是我国北方的主要粮食作物,同样也存在着明显的杂种优势,随着人口增多,耕地面积逐年减少,提高小麦单产亦成为农业科技人员的主要任务。一、国内小麦杂种优势利用研究概况自从本世纪30年代美国在生产上应用杂交玉米以后,人们也想利用杂种小麦,但制种困难。50年代初日本木原均用山羊草作母本与普通小麦回交获得小麦
Heterosis refers to the hybridization of two hereditary parents F1 hybrid superior to the phenomenon of parents. People have used hybrid vigor in the production of hybrid corn, hybrid sorghum, hybrid rice and hybrid rape, etc., which greatly contribute to the increase of its production. Wheat is a major grain crop in the northern part of our country. There is also obvious heterosis. As the population increases, the area of arable land decreases year by year. Improving wheat yields has also become a major task for agricultural scientists and technicians. First, the domestic utilization of wheat heterosis Survey Overview Since the 1930s the United States in the production of hybrid corn, people also want to use hybrid wheat, but difficult to seed. In the early 1950s, Japan, the original wood were used as a female parent goat grass and common wheat backcrossed access to wheat