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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。
In this experiment, 20 potato clones were used as the material to conduct the path analysis of tuber yield-related traits. The results showed that the sequence of nine related traits affecting the tuber yield was: tuber number> tuber size> root number> root tension> fresh weight> canopy fresh weight> commercial potato product rate> emergence time> canopy coverage. Increasing tuber number and tuber size are the main ways to increase tuber yield. Select the root system of developed materials, is an important way to improve tuber yield. The commodity potato yield is determined indirectly by the size of the stem, canopy coverage by the number of tubers, and tuber yield. The increase in days of emergence can result in a substantial reduction in tuber yield.