The effect of the sowing date and density on the main economic characters were analyzed in tumorous stem mustard.
为给茎瘤芥的标准化栽培技术提供依据，研究了播期和密度对茎瘤芥主要经济性状的影响。
Key findings are as follows: 1. Selfing had significant impacts on the main economic characters of Brassica napus l.
主要研究结果如下：1。自交对甘蓝型油菜主要经济性状有显著影响。
All the main economic characters of the populations showed the trend of the selective targets with decay of variability.
两群体各主要经济性状有向选择目标集中、变异度下降的趋势。
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