马铃薯主栽品种对晚疫病抗性的鉴定

Identification of Late Blight Resistance for Main Potato Varieties

为了筛选产量高、抗晚疫病性能好、适宜宁南山区大面积推广的优良品种,在适宜马铃薯种植和晚疫病流行的西吉县对23个马铃薯品种作田间抗病性鉴定。结果表明:马铃薯品种‘青薯9号’、‘庄薯1号’、‘庄薯3号’、‘冀张薯8号’、‘陇薯3号’等品种高产、抗病性强,适宜大面积推广。产量在1 000 kg/667 m2以上且抗性较好的品种依次是:‘晋薯14号’、‘宁薯4号’、‘晋薯15号’、‘宁薯13号’、‘同薯23号’、‘克新17号’,适宜做轮换品种。经相关分析,不同马铃薯品种的病情指数和产量呈极显著的负相关。

In order to screen varieties with high yield and high late blight resistance,we conducted an experiment in which disease indices of 23 potato varieties were analyzed in Guyuan City.Excellent varieties suitable for local environments were selected.Results showed that the varieties ＇Qingshu 9＇,＇Zhuangshu 1＇,＇Zhuangshu 3＇,＇Jizhangshu 8＇ and ＇Longshu 3＇ had high yield and good disease resistance,which should be extended in large scale.＇Jinshu 14＇,＇Ningshu 4＇,Jinshu 15＇,＇Ningshu 13＇,＇Tongshu 23＇,and ＇Kexin 17＇,which had fair high late blight resistance and a yield of more than 1000 kg/667m2,should be used as candidates.Correlation analysis indicated that the relationship between disease index and yield was significantly negative.