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- 2018
内蒙古自治区主栽马铃薯品种对黄萎病的抗性鉴定
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Abstract:
为明确内蒙古自治区主栽马铃薯品种对黄萎病的抗性情况，于2016年分别在内蒙古自治区乌兰察布市凉城县、锡林郭勒盟正蓝旗、锡林郭勒盟多伦县3个试验田对16个马铃薯品种抗性进行鉴定。试验采用室内与田间鉴定相结合，通过调查地上部植株和地下部块茎的发病程度评价马铃薯品种的抗性。室内抗性鉴定结果显示，在所测定的16个马铃薯品种中，抗病品种有3个（10 ≤病情指数<20），占总品种的18.75%；中抗品种有8个（20 ≤病情指数<35），占总品种的50.00%；感病品种有5个（病情指数≥ 35），占总品种的31.25%，未发现免疫和高抗品种。田间人工病圃和自然病圃抗性鉴定结果显示，部分品种在不同地区的抗性表现不稳定，其中合作88在不同地区的抗性水平较强，适合在黄萎病流行地区种植，从而达到防病增产的目的。
In order to clarify the resistance level of potato varieties against Verticillium dahliae in Inner Mongolia, the main cultivars of potato varieties were identified in three counties, Liangcheng in Wulanchabu City, Zhenglan Banner and Duolun of Xilin Gol League, with 16 different varieties in 2016. The identification were carried out under both field and laboratory condition by using the method of inoculation and nature infected. Evaluation of potato resistance to V. dahliae was performed by investigating the symptom on both the underground tubers and aerial part leaves of plant. The results showed with the total tested varieties that the resistance level of different potato varieties to Verticillium wilt was variable,and three varieties showed resistant level (10 ≤ disease index<20) and the ratio was 18.75%, eight varieties showed middle resistance level (20 ≤ disease index<5), accounting for 50.00%,and five varieties showed susceptibility (disease index ≥ 35), accounting for 31.25%, and no immune and high resistance variety was screen out in this identification. Through a comprehensive analysis of the results obtained from the investigation on the part leaves and the underground tubers of potato varieties planted both in the artificial nursery and natural infected field, the resistance of some varieties were discovered instability in different areas. Hezuo 88 showed the highest level against V. dahliae, this variety was suitable for planting in the epidemic area of Verticillium wilt with potato, thereby achieving the purpose of controlling disease and increasing yield.
