马铃薯品种(系)资源的疮痂病抗性鉴定

为了筛选出高抗疮痂病马铃薯品种(系),本研究以36份马铃薯品种(系)资源为材料,分别在南宁市和玉林市种植,通过调查发病率和病情指数,用隶属函数法对36份材料的疮痂病抗性田间自然病圃鉴定结果进行分析。结果表明,发病率(x)和病情指数(y)呈正态分布,y是x的指数函数;明确了其中有2份高抗疮痂病马铃薯品种(系)和1份高感疮痂病马铃薯材料,田间种植法与人工接种鉴定结果基本一致,为马铃薯疮痂病情预测和抗疮痂病育种提供了参考。

Identification of Scab Resistance in Potato Variety Resources

In order to screen some potato varieties (lines) with high resistance to scab, the scab resistance of 36 potato variety (line) resources planted in Nanning city and Yulin city were comprehensively evaluated through the point of the incidence and disease index. The membership function method were used to analyze these field identification results in this study. The results showed that the incidence (x) and disease index (y) presented the normal distribution. y is the exponential function of x. Two potato varieties with high resistance to scab and one potato material with high susceptibility to scab were obtained. The results of field planting method are basically the same as that of artificial inoculation identification. These findings could provide reference for the prediction of potato scab disease and scab resistance breeding.