甜菜是异花授粉作物,变异机率很大,一般受遗传因子的影响占40%,受环境因子的影响占60%,同时,对良种的要求更应具有生物学特性和经济性状的相对一致性和遗传上的稳定性,只有这样,才能保持品种的种性,也才能更具备品种的代表性。五十年代中,我国以引近品种为主。在全国甜菜主产区,开展了区域联合鉴定,分别选 Beet is a cross-pollination crop, the mutation rate is very high, generally affected by genetic factors accounted for 40%, affected by environmental factors accounted for 60%, at the same time, the requirements for better varieties should have the biological characteristics and economic characteristics of the relative consistency And genetic stability, the only way to maintain the variety of species, but also be more representative of the species. In the fifties, our country mainly refered varieties. In the main beet producing areas nationwide, carried out a joint regional identification, were selected