人们对良种的要求,通常用八个字来概括,叫做“高产、优质、抗逆性强”。这个作物上通用的提法,一直延用至今。一个品种,能全面达到“八字”要求,当然最为理想,不过如此面面俱到,实属难求。因此,育种工作者,总是根据本身服务的对象和地区,来考虑和制订具体的育种目标,有重点地突出某一个或某一些性状,作为主攻方向。譬如,水稻育种,以往主要是攻高产,现在开始重视品质育种了,试图通过育种手段,提高稻米的蛋白质、氨基酸的含量,以改进稻米的食用品质。 People’s requirements for thoroughbreds are generally summed up in eight characters and are called “high yield, good quality and strong resistance”. The generic term for this crop has been used until now. A variety, can fully meet the “character” requirement, of course, the most ideal, but so exhaustive, it is hard to find. Therefore, breeders always consider and formulate specific breeding objectives according to the target and area of ​​their services, with emphasis on one or a few traits as their main direction of attack. For example, rice breeding has mainly been to attack high-yielding crops. Now it has begun to attach importance to quality breeding. It is trying to raise the rice protein and amino acid content through breeding methods so as to improve the food quality of rice.