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根据我国审定登记的5 个苏丹草品种的种子特征、幼苗胚芽鞘在温室3 种不同营养液及田间条件下的颜色特征,探讨了苏丹草品种真实性和纯度鉴定的方法。结果表明,供试苏丹草品种可以通过种壳颜色、种子形状、千粒重和幼苗胚芽鞘颜色组成比例分组,其中宁农苏丹草与其余4 个品种在上述性状上均存在显著差异,极易区分;其余4 个品种间可以由千粒重进一步划分为2 组。与高粱幼苗胚芽鞘的颜色组成相似,苏丹草幼苗的胚芽鞘颜色也可以分为紫红色和绿色,并可作为品种真实性鉴定的特异性状。
According to the seed characteristics of five sudangrass varieties registered in our country, the color characteristics of the seedling coleoptiles in three kinds of different nutrient solutions and field conditions in greenhouse, the authenticity and purity identification methods of sudangrass varieties were discussed. The results showed that the cultivars of Sudangrass could be divided into groups according to the color of seed coat, seed shape, 1000 - grain weight and seed coat coleoptile color. Among them, the Sudan grass of Ning nong and other four cultivars showed significant differences in these traits, The remaining four varieties can be further divided by 1000 grain weight into two groups. Similar to the color composition of the coleoptile of sorghum seedlings, the coleoptile color of sudangrass seedlings can also be divided into fuchsia and green, and can be used as the trait identification of the authenticity of varieties.