本世纪以来农作物一代杂种已在世界各国得到普遍利用。实践证明由于采用了优良的一代杂种,明显地提高了农作物产量。一代杂种之所以有较强的优势,一方面是由于双亲有较高的配合力,另一方面与其自然杂交率高有其密切关系。甜菜虽属异花授粉作物,但是两个品种(品系)间自然杂交率仅为50—60％,这就在一定程度上影响了杂交优势效果。甜莱属于聚合花果,花器较小,通过人工去雄法大量 Since the turn of the century, crop hybrids have gained widespread use in all countries of the world. Practice has proved that due to the use of a good generation of hybrids, significantly increased crop yields. The reason why the generation of hybrids have a strong advantage, on the one hand because of their parents with higher combining power, on the other hand, its high rate of natural hybridization has its close relationship. Although sugar beet is a cross-pollination crop, the natural hybridization rate between the two varieties (strains) is only 50-60%, which affects the heterosis effect to a certain extent. Sweet Lai belongs to the polymerization of fruit, flower smaller, through a large number of male to male method