大豆抗蚜性资源抗性的鉴定分析

 【目的】对田间抗性测验筛选得到的P189、P203、P574和P746等4份栽培大豆抗蚜性资源进行抗性鉴定。【方法】采用选择性、非选择性试验方法以及重复鉴定。【结果】资源P189、P574和P746在蚜虫抗性等级和受害指数水平上和不具有抗性的对照品种相比具有显著的差异（P=0.05），其中P574和P746表现更加稳定，能阻止蚜虫在植株上繁殖，为抗生性品种;P203在田间自然感蚜和选择性试验中与不具有抗性的对照品种相比具有显著的差异（P=0.05），在非选择性试验中感蚜，表现对蚜虫生长有一定的抑制作用，为排趋性品种。【结论】田间自然感蚜，选择性试验和非选择性试验在划分蚜虫抗性等级和受害指数水平上存在明显的差异，这些差异是在不同的选择压下宿主对侵害者反应的表现。

Identification of Soybean Resources with Resistance to Aphids

【Objective】 The resistance to soybean aphid (Aphis glycines Matsmura) was found in four cultivars P189, P203, P574, and P746. 【Method】 Those resources were identified again in field test, choice test and no-choice test. 【Result】 The grade of resistance to aphids and damage index of P189, P203 and P746 was significantly different from those of susceptible cultivars (P=0.05). P574 and P746 possessed antibiotic resistance, prevented aphids from reproduction on the plants. P203 possessed antixenosis resistance, prevented aphids from reproduction in field test and choice test, but susceptible in no-choice test. 【Conclusion】 Population development of aphids on plants is significantly different in field test, choice test and no-choice test, which is caused by different selective pressure.