BEMISIA TABACI BIOTYPE Q DOMINATES OTHER BIOTYPES ACROSS CHINA

文献类型： 外文期刊

第一作者： Wan, Fang-Hao

作者： Wan, Fang-Hao;Chu, Dong

作者机构：

关键词： sequence characterized amplified region marker: SCAR marker;genetic divergence;species distribution;species domination;GeneBank sequence data

期刊名称：FLORIDA ENTOMOLOGIST （ 影响因子：1.425； 五年影响因子：1.595 ）

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收录情况： SCI

摘要： Bemisia tabaci (Gennadius) biotype Q was first reported as an invasive species in 2005 in China. The present study is the first with this serious pest to determine the distribution and proportion with B. tabaci Q-SCAR (sequence characterized amplified region) marker, and to identify the distribution of the biotype Q through extensive survey and systematic sampling in most regions of China. We made 22 collections from 15 provinces in Sep-Oct, 2007. The results showed that B. tabaci biotype Q was found in 19 collections from Shangdong, Gansu, Shaanxi, Guangxi, Zhejiang, Guizhou, Tianjin, Shanxi, Hunan, Henan, Hubei, Jiangsu, and Hainan provinces. The proportion (%) of B. tabaci biotype Q occurrence varied from 6.4% to 95.2% in these 19 collections, and it dominated (>50%) in 10 collections. The genetic divergence analysis based on mitochondrial cytochrome oxidase I (mtCOI) gene revealed that Q-SCAR marker was specific to biotype Q, and the non-Q biotypes mainly consisted of biotype B. The present results revealed that the biotype Q has become dominant across the country, and suggested that the displacement of non-Q biotypes by biotype Q has occurred in many regions. Furthermore, the introduction of the biotype Q might has mainly occurred through human activities rather than natural sources.

分类号： Q96

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