油菜单株角果数、角粒数和千粒重是构成产量的三个因素,不但单个因素对产量有着直接影响,而且任一因素会通过其他因素对产量起间接的作用。为了进一步了解各因素对单株产量所起的作用的相对重要性,采用1975—1980年白菜型油菜品种(品系)多点比较试验资料进行通径分析。供试品种(品系)20个,属北方白菜型冬油菜,分别在洛川、黄龙、陇县、 The number of pods per plant, the number of grains and the 1000-grain weight of oilseed rape are the three factors that make up the yield. Not only the single factor has a direct impact on the yield, but also any factor can play an indirect role on the yield through other factors. In order to further understand the relative importance of each factor on the yield per plant, the path analysis was carried out by using the comparative test data of Brassica campestris L. from 1975 to 1980. Test varieties (strains) 20, is a northern cabbage-type winter rape, respectively, in Luochuan, Huanglong, Longxian,