【摘要】 本试验以２０个马铃薯无性系为材料，进行块茎产量相关性状通径分析。结果表明，９个相关性状对块茎产量影响的顺序为：块茎数＞块茎大小＞根数＞根系拉力＞根鲜重＞冠层鲜重＞商品薯率＞出苗天数＞冠层覆盖度。提高块茎数和块茎大小是增加块茎产量的主要途径。选择根系发达的材料，是提高块茎产量的重要途径。商品薯率通过决茎大小，冠层覆盖度通过块茎数进行间接选择，亦可提高块茎产量。出苗天数的增加可导致块茎产量大幅度减少。更多还原

【Abstract】 Abstract Twenty potato varieties were used in this study to conduct a path analysis on some characters relevant to tuber yield. Among the nine characters observed, the sequence of their role on tuber yield was as follows: tuber number>tuber size>root number>RPR>fresh root weight>fresh canopy weight>rate of marketable tuber>emergence days>CCD. Tuber yields can be increased by two important ways, increasing tuber number and tuber size. Seleting materials with flourishing root system was an effective way to improve tuber yields. Indirect selection of marketable tuber rate through tuber size and CCD through tuber number could improve tuber yields. To increase emergence days could lead to reduction of tuber yields.更多还原