论文部分内容阅读
选育与运用具有杂交优势品种是提高甜菜产量、含糖和改善甜菜有益性状的有效途径之一。但是,普通甜菜在自由杂交条件下,并不能达到品种间完全杂交。即除了杂交种子外,还会得到母本与父本类型种子。如目前生产上采用的混合三倍体品种,其品种间杂交率仅为40～60%,其中尚有较低生产力的50%左右的二倍体与四倍体种子。因此,为了达到最高的杂交效果,选用高配合力的雄性不育系生产杂交种,具有十分重要
Breeding and utilization of hybrid varieties is to improve the yield of sugar beet, sugar and improve the usefulness of beet traits one of the effective ways. However, the common beet in the free hybridization conditions, and can not achieve complete hybridization between varieties. That is, in addition to hybrid seeds, but also get the mother and paternal seed. Such as the current production of mixed triploid varieties, the cross-species hybrid rate of only 40 to 60%, of which there are about 50% of the lower productivity of diploid and tetraploid seeds. Therefore, in order to achieve the highest hybridization efficiency, it is very important to select hybrids with high male sterility