一、引言人类干预大麦的发展已使这种作物遍布世界各地,有成千上万的人从事改良大麦品种的工作。改良者总是力图得到产量增加和产品更合乎需要的,价值更高的作物。改良技术已从宗教魔术式的,发展到耐心选育品种计划。育种者的直接目标,包括试图找到纠正某种缺陷的方法,例如抵抗倒伏、落粒和特种病虫害的类型,以达到最大限度地提高产量潜力的综合目的。前一种情况涉及的基因可能较少,而后一种情况也许涉及大多数染色体组,并与植株整 I. INTRODUCTION Human intervention The development of barley has led to the spread of this crop all over the world, with tens of thousands of people working on improving barley varieties. The reformers are always trying to get higher value crops with increased yields and more desirable products. Improved technology from the religious magic, the development of patient breeding varieties plan. The immediate goal of breeders, including trying to find ways to correct a defect, such as lodging resistance, falling and the type of pest and disease, in order to achieve the maximum comprehensive yield potential. The first case may involve fewer genes, while the latter case may involve most of the genomes and interact with the whole plant