旱作区抗病优质高效马铃薯新品种(系)筛选试验初报

为筛选出适宜天水市旱作区种植的优质马铃薯品种，解决马铃薯生产中存在的品种单一、抗病、优质专用品种相对缺乏及产量水平相对低下等问题。以当地主栽马铃薯品种陇薯6号为对照品种，对引进的11个马铃薯品种(系)进行了品种比较试验。结果表明，DSS-35折合产量最高，为35 704.05 kg/hm2，较对照品种陇薯6号增产15.23%；京张薯1号、陇薯20号折合产量较高，分别为34 784.40、34 340.85 kg/hm2，较对照品种陇薯6号分别增产12.26%、10.83%。这3个马铃薯品种(系)综合性状优良、商品薯率较高，较抗病毒病和环腐病，块茎晚疫病发病较轻，适宜在天水市旱作区及同类生态区种植。

Preliminary Report on the Screening Experiment of New Potato Varieties(Lines) with Disease Resistance, High Quality and High Efficiency in Dry Farming Region

To select premium potato varieties suitable for the dry farming region in Tianshui and to address issues in potato production such as repetitious variety, lack of high quality and disease resistant varieties, and relatively low production level, a comparision experiment was conducted by using 11 introduced potato varieties(lines) and Longshu 6(main local variety) as the control. Results showed that average yield peaked in DSS-35, i.e. 35 704.05 kg/ha, and was 15.23% higher compared with that of the control, yields in Jingzhangshu 1 and Longshu 20 were also high which were 34 784.40 kg/ha and 34 340.85 kg/ha, respectively, and were 12.26% and 10.83% higher compared with that of the control, respectively. Those 3 varieties(lines) showed ideal comprehensive characters and high commodity rates of potato, they were also resistant topotato virus and ring rot diseases with less occurrence of late blight, and were considered to be suitable for dry farming production in Tianshui as well as other areas with similar ecological conditions.