塑料大棚内6个欧亚种葡萄品种对霜霉病的抗性表现

Resistance Performance of Six Eurasian Grape Varieties to Downy Mildew in Plastic Greenhouse

在葡萄霜霉病盛发期(7~9月份),通过田间自然鉴定和室内离体叶圆片接种鉴定方法,探讨了塑料大棚内6个欧亚种葡萄品种对霜霉病的抗性。2种方法均以叶片为调查对象,以发病率和病情指数为指标。结果表明:供试的6个欧亚种葡萄品种都不抗霜霉病,但品种间存在感病性的差异。根据室内离体叶圆片接种鉴定的病情指数,将试验品种分为3类:凤凰51号为高感品种,维多利亚、研选5号、9307为中感品种,早紫、粉红亚都蜜为低感品种。由于供试品种中早紫和粉红亚都蜜品种对霜霉病的抗病性最强,建议在霜霉病发病严重的南方保护地适度推广栽培,也可作为育种的原始材料加以利用。

In the most serious occurrence period of downy mildew(from July to September),resistance performance of 6 grape varieties(Vitis vinifera)to downy mildew in plastic greenhouse is evaluated in naturally infected field and artificial inoculation on leaf discs in lab.The two methods are both for investigating leaves,the indexes are disease incidence and disease indexes.The results show that tested 6 grape varieties are not resistant to downy mildew,but there are differences among the cultivars.According to the disease indexes of artificial inoculation on leaf discs in lab,the studied varieties can be divided into 3 types:Fenghuang 51 is the highest susceptible variety,Vitoria,Yanxuan 5 and 9307 are moderately susceptible varieties;Zaozi and Fenhongyadumi are slightly susceptible varieties.Comprehensive analysis shows that disease resistance of Zaozi and Fenhongyadumi are the strongest to downy mildew in the tested varieties.It is suggested that it should be popularized and cultivated in the protected areas of southern China where the incidence of downy mildew is serious,and it can also be used as the original material of breeding.