通过组培快繁重点杂交组合(陇薯8号×早大白)建立LZ脱毒群体，组培扩繁基因型144份，平均每份基因型生产原原种196粒，共生产28 178粒。经鉴定试验筛选出LZ群体表现优异的基因型19份，田间表现薯形美观、芽眼浅，小区产量平均比对照品种陇薯6号高67.9%，淀粉含量平均比对照品种陇薯6号低5.5%。品系LZ111在16份入选品系中表现优异，薯形椭圆，薯皮白色、薯肉白色，表皮光滑、芽眼浅；小区产量居参试品种(系)的第2位，比对照品种陇薯6号高65.65%；薯块淀粉含量居参试品种(系)的第8位，比对照品种陇薯6号高11.6%；薯块炸片评分居参试品种(系)的第6位，比对照品种陇薯6号低16.7%。

The LZ virus-free population is established by tissue culture of hybridization combination(Longshu 8×Zaodabai)， and 144 genotypes are amplified by tissue culture， with an average of 196 seeds per genotype， producing 28 178 seeds. The result shows that there are 19 genotypes with excellent performance in the LZ population， with the yield is 67.9% higher than that of the control and the average starch content is 5.5% lower than the control. The strain LZ111 is excellent in 16 cultivars， with the shape of oval-shaped， white potato skin， white potato meat， smooth skin and bud eyes shallow. The yield are ranked the 2nd in the tested cultivar， 65.65% higher than that of the control， the starch content of potato tuber are ranked the 8th in the tested cultivar， and 11.6% higher than that of the control， the potato chips are ranked the 6th in the tested cultivar， 16.7% lower than the control.

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国家现代农业产业技术体系专项(CARS-10)、甘肃省科技支撑计划项目(1304NKCA127)、甘肃省青年科技基金计划项目(145RJYA277)、甘肃省农业科学院中青年基金项目(2014GAAS22)资助。