普杜大学玉米育种工作的一个重要部分就是致力于选育自交系。这些自交系要能把抗逆性、对环境变化的适应性、直立性和高产潜力传递给杂交种。近年来单交种的商品化,使育种家十分强调自交系本身的性能。向农民发放价格合理的单交种并能使种子公司受益,需要有高 Pudding University, an important part of maize breeding is committed to breeding inbred lines. These inbreds should be able to pass on their resistance to changes, their adaptability to environmental changes, their uprightness and their high yield potential to hybrids. The commercialization of single crossbreeds in recent years has breederly emphasized the performance of inbred lines themselves. The need to pay farmers a reasonably priced single cross and to benefit seed companies