人们早就梦想到能够在实验室内大量生产种子，最大幅度的提高育种效率，在培育新品种上有可能发生一次大的革命。即在培育品种过程中，如果选择优良的个体，能够像F1（杂交第一代）那样遗传性稳定，品质优良的种子。美国和日本的两家公司，已成功地开发了芹菜、莴苣、苜蓿的人 People have long dreamed of being able to produce large quantities of seeds in laboratories, to maximize the efficiency of breeding and to have a major revolution in cultivating new varieties. That is to say, in the process of cultivating varieties, if an excellent individual is selected, the seeds of the genetically stable and excellent quality like F1 (hybrid first generation) can be obtained. The two companies in the United States and Japan have successfully developed celery, lettuce, and alfalfa