文献类型： 外文期刊
作者： Tu Xiong-bing 1 ; Fan Yao-li 1 ; Ji Ming-shan 2 ; Liu Zhong-kuan 3 ; Xie Nan 3 ; Liu Zhen-yu 3 ; Zhang Ze-hua 1 ;
作者机构： 1.Chinese Acad Agr Sci, Inst Plant Protect, State Key Lab Biol Plant Dis & Insect Pests, Beijing 100193, Peoples R China
2.Shenyang Agr Univ, Coll Plant Protect, Biopesticide Engn Res Ctr Liaoning Prov, Shenyang 110161, Peoples R China
3.Hebei Acad Agr & Forestry Sci, Inst Agroresourse & Environm, Shijiazhuang 050051, Peoples R China
关键词： thrips quantity ratio (TQR) model;alfalfa;cultivar resistance;thrips;natural enemy
期刊名称：JOURNAL OF INTEGRATIVE AGRICULTURE （ 影响因子：2.848； 五年影响因子：2.979 ）
ISSN： 2095-3119
年卷期： 2016 年 15 卷 3 期
页码：
收录情况： SCI
摘要： The thrips quantity ratio (TQR) model is an important tool for evaluating crop resistance to thrips based on the correlation between thrips quantities and cultivars. Unfortunately, it is inaccurate, and the results appear significantly inconsistent when analysing the same cultivars in the same field study. To improve this model, we first studied the resistance of 28 alfalfa cultivars to thrips in Cangzhou, Hebei Province, north China. The results showed that the most suitable evaluation period was from May to June, as the thrips population was stable during this period. Second, we found that the natural enemy population was significantly positively correlated with the thrips population density (R=0.7275, P<0.0001), which might influence resistance estimation. Hence, we introduced a parameter 'alpha', corresponding to the natural enemy quantity ratio, to eliminate the effect of the natural enemy using "alpha TQR". Using the improved method, 28 cultivars were clustered into three classes: the resistant class, sensitive class, and median class. All numerical values were calculated for alpha TQR displayed as a Gaussian distribution. This information showed that all data should be divided into nine groups using a median value of 1 +/- 0.1 with an equal difference of 0.1. Based on the new standard cultivars, Gongnong 1, Alfaking, Cangzhou and Algonquin were classified as highly resistant cultivars; Zhongmu 3, Gongnong 2, Zhongmu 1 and Zhongmu 2 were classified in the resistant group; Queen was classified in the moderately resistant group; Derby, WL354HQ, KRIMA, Apex, 53HR, SARDI 5 and Farmers Treasure were classified in the median class; WL319HQ, WL343HQ and Sitel were classified as the low sensitive group; WL440HQ and SARDI 7 as the moderately sensitive group; WL168HQ and Sanditi as the sensitive group; and SARDI 10, WL363HQ, FD4, WL323 and SOCA as the highly sensitive group.
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