根据应用目的(粒用、青贮)和现有选育杂交种的原始材料、技术经济条件以及其它条件选育并在全国农业生产上应用的杂交种多种多样,其中包括突变体。杂交种有:单交种、三交种、双交种、复交种、顶交神及其它杂交种。在许多特定的条件和可能的情况下,选育回交杂交种(即其中一个或两个亲本均来源于 Hybrids that are bred and applied to agricultural production across the country according to the intended use (grain, silage) and the original materials, technical and economic conditions and other conditions of existing breeding hybrids include mutants. Hybrids are: single cross, three crossbred, double crossbred, complex cross, top cross God and other hybrids. In many specific conditions and possible situations, the selection of backcross hybrids (ie, one or both of which are derived from