一、前言番茄一般是自花授粉植物,但是长期的近亲繁殖,容易降低产量,使抗病性感弱,这是由于两种生物学上彼此关系相近的性細胞結合在一起时,所形成的受精卵,內在的矛盾小,生活力低,而表现衰退现象。近年来世界各国广泛的应用有性什交来培育什种优势,在农叶增产上已得到了显著的效果,尤其在苏联等社会主义国家,在这方面更深入的研究,得到了輝煌的成績。 I. INTRODUCTION Tomatoes are generally self-pollinating plants, but long-term inbreeding tends to reduce yields and make them resistant to disease. This is due to the fact that when two cells that are biologically closely related to each other are brought together, Eggs, the inherent contradictions small, low vitality, and the performance of recession. In recent years, various countries in the world have extensively applied what kind of sex to cultivate their advantages and have achieved remarkable results in boosting their agricultural output. In particular, the socialist countries such as the Soviet Union have made brilliant achievements in their further research in this field .