选育早熟,丰产、含油率高的甘兰型油菜新品种是我省粮、棉、油超《纲要》的重要课题之一。在选种工作中,特别是系统选育的单株选择中,往往需要处理几千个样株的含油率测定,如果仍用常规抽提的方法,样品和材料消耗多工作量亦大。近年来,国外从油类种籽的比重与含油量的相关关系上,获得了大量筛选品种的新方法,我们参考其中的一个方法对15个甘兰型油菜品种进行了初步试验和研究,简报如下:一、试验方法用溴苯和煤油调制成从比重1.08到1.18(每0.02为一级)六种梯度的溶液,[注]分别放在25毫升的量筒中,成为一组比重梯度系列管,然后在每一个已经经过1—2毫米 Breeding of early maturity, high yield, high oil content of Brassica napus new varieties of grain, cotton, oil super “outline” one of the important issues. In the selection work, especially in the selection of plants for system selection, it is often necessary to deal with the determination of the oil content of several thousand samples, and if the conventional extraction method is still used, samples and materials consume a large amount of work. In recent years, a large number of new methods for screening varieties have been obtained from the correlation between the proportion of oil seeds and the oil content in foreign countries. We have made preliminary tests and studies on 15 varieties of Brassica oleracea with reference to one of them As follows: First, the test method with bromobenzene and kerosene prepared from the specific gravity of 1.08 to 1.18 (each 0.02 for a) six gradient solution, [Note] were placed in a 25 ml graduated cylinder to become a series of gravimetric gradient tube , Then after each one has gone 1-2 mm