甜菜多倍体育种成败的关键,主要在于诱变四倍体及用以制种的二倍体亲系间的配合力,即双亲的优良经济性状与生物学性状及其对当地栽培条件的适应性的遗传传递能力。它表现在用以制得的三倍体对环境条件的适应能力与同化程度和抗逆性及经济效果上。要获得一个理想的三倍体,不但要在诱变、选择、稳定四倍体上采取有效手段,还要选取配合力好的亲本。因此,要获得大幅度增产的三倍体,必须占有不同亲缘的四倍体,并选配大量的制种组合。四倍体甜菜的获得有许多方法,最常采用的主要是:一、诱变当地优良的二倍体,镜检淘汰其它倍数体、非正倍体、嵌合体,选 The key to the success of beet polyploid breeding is mainly the combination ability of tetraploid mutagenesis and diploid progeny used for seed production, that is, the excellent economic traits and biological traits of parents and their adaptation to local cultivation conditions Sexual transmission ability. It manifests itself in the adaptability, assimilation and resistance to environmental conditions and economic effects of the triploids obtained. To obtain an ideal triploid, not only to take effective measures in mutagenesis, selection, stable tetraploid, but also to select a good combination of parents. Therefore, in order to obtain the triploidy with a large increase in production, it is necessary to possess tetraploids of different relatives and to have a large number of seed combinations. There are many ways to obtain tetraploid beet, the most commonly used are: First, the mutagenesis of local diploid diploid, microscopic elimination of other fold body, non-diploid, chimera, selection