目前选育橡胶优良品系的主要方法仍然是有性杂交。但在杂交育种的实践中,存在的问题是杂交亲本的配合力。育种工作者通常遇到的情况是,具有某些优良性状的亲本,其优良性状并不在杂交后代中表现出来;相反,某些只具有一般性状的亲本,其杂交后代却有良好的表现。这显 At present, the main method of selecting excellent strains of rubber is still sexual hybridization. However, in the practice of crossbred breeding, the existing problem is the combining ability of the hybrid parents. Breeding workers usually encounter the situation that parents with some excellent traits whose fine traits are not shown in the cross of offspring; on the contrary, some parents with only common traits have good performance in their offsprings. This is significant