| 北方春玉米区亚洲玉米螟对Bt玉米的抗性风险分析 |
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| 引用本文：黄运新,封洪强,吴孔明.北方春玉米区亚洲玉米螟对Bt玉米的抗性风险分析.植物保护学报,2019,46(6):1262-1269 |
| DOI：10.13802/j.cnki.zwbhxb.2019.2018208 |
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| 中文摘要:为了解我国北方春玉米区种植Bt玉米条件下主要靶标害虫亚洲玉米螟Ostrinia furnacalis的Bt抗性风险，探索合理的Bt玉米种植比例，根据亚洲玉米螟的特点构建种群动态与遗传模型，对不同的Bt玉米种植比例进行分析评估。结果显示，当以种子混合种植75%的Bt玉米+25%的非Bt玉米庇护所时，亚洲玉米螟的种群控制时间，即亚洲玉米螟种群密度下降到每百株玉米植株30头幼虫以下的时间，为1~2年，而害虫的抗性时间，即亚洲玉米螟种群抗性基因频率达到50%的时间，在1代区为40年、在2代区为20年。当以种子混合种植20%、15%、10%、5%的非Bt玉米庇护所时，亚洲玉米螟的种群控制时间仍为1~2年，而害虫的抗性时间缩短，在1代区分别是29、21、15、9年，在2代区分别是14、10、7、4年。表明在研究区域内以种子混合种植20%以上的非Bt玉米庇护所可维持对亚洲玉米螟的Bt抗性管理至少14年。 |
| 中文关键词:Bt玉米 亚洲玉米螟 种群控制 抗性演化 模型分析 |
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| Risk analysis of the resistance of Asian corn borer to Bt corn in the spring corn-growing region of northern China |
| Author Name | Affiliation | E-mail | | Huang Yunxin | Faculty of Resources and Environmental Science, Hubei University, Wuhan 430062, Hubei Province, China | y.huang@hubu.edu.cn | | Feng Hongqiang | Institute of Plant Protection, Henan Academy of Agricultural Sciences, Zhengzhou 450002, Henan Province, China | | | Wu Kongming | State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China | |
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| Abstract:In order to understand the risk of the resistance of the Asian corn borer Ostrinia furnacalis to Bt corn and determine the appropriate proportion of Bt corn-planting area in the spring corn-growing region of northern China, the models of O. furnacalis population dynamics and genetics under different planting conditions of Bt corn were developed and analyzed. The results showed that, when 75% Bt corn or 25% non-Bt corn refuge was planted by mixing seeds, the time to population control, i.e. the time for the O. furnacalis population density to drop below 30 larvae per 100 corn plants, was one to two years, while the time to resistance, i.e. the time for the frequency of resistance allele in the O. furnacalis population to reach 50%, was 40 years in the first-generation region and 20 years in the secondgeneration region. When 20%, 15%, 10% and 5% non-Bt corn refuges were planted, the time to population control was also one to two years, while the time to resistance was 29, 21, 15 and 9 years in the first-generation region, and 14, 10, 7 and 4 years in the second-generation region, respectively. In conclusion, planting at most 80% Bt corn or at least 20% non-Bt corn refuge was required in order to manage the Bt-resistance of O. furnacalis for at least 14 years in the study region. |
| keywords:Bt corn Asian corn borer population control resistance evolution model prediction |
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