Population genetics and the origin of new invasive biotype Q of Bemisia tabaci (Hemiptera: Aleyrodidae) in Taiwan
碩士 === 國立臺灣大學 === 昆蟲學研究所 === 97 === The sweetpotato whitefly, Bemisia tabaci, is among the top 100 invasive pests in the world. This species causes serious agricultural damages in many countries. More than 26 biotypes have been detected worldwide. Recently, biotype Q was reported as a new invasive p...
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ndltd-TW-097NTU051850082016-05-04T04:31:31Z http://ndltd.ncl.edu.tw/handle/63692318200896873372 Population genetics and the origin of new invasive biotype Q of Bemisia tabaci (Hemiptera: Aleyrodidae) in Taiwan 臺灣地區新入侵煙草粉蝨Q型生物小種族群遺傳結構與入侵源之研究 Yi-Hsien Chiang 蔣宜弦 碩士 國立臺灣大學 昆蟲學研究所 97 The sweetpotato whitefly, Bemisia tabaci, is among the top 100 invasive pests in the world. This species causes serious agricultural damages in many countries. More than 26 biotypes have been detected worldwide. Recently, biotype Q was reported as a new invasive pest globally which has spread throughout the world with the trade of poinsettia (Euphorbia pulcherimma). In 2006, biotype Q was first recorded at the World Vegetable Center in Tainan, Taiwan. After wards, 791 samples were collected in Taiwan. Biotype Q was found in 7 poinsettia greenhouses, but not in the field. I hypothesized that it is in the early stages of invasion. Determining the origin of this invasion is important for importing quarantine. This study provides information for eradication program, and further introductions and reinvasions will hopefully be avoided by applying intensive quarantine regulations on possible invasion routes. Using mitochondrial cytochrome oxidase I (COI) sequences as a molecular marker to study phylogeography, I explored genetic differences and dispersal patterns of B. tabaci biotype Q in the world by reconstructing a minimum spanning network. The origin of biotype Q-related biotypes was in Central and West Africa. However, the origin of biotype Q was somewhere between Europe and Asia, and then it spread into Europe by natural dispersal. Recent invasion events in the world of biotype Q were from Europe. This suggests that it spread by human trade. Moreover, I applied 12 microsatellite loci by means of multiplex polymerase chain reaction (PCR) to investigate phylogenetic relationships and the population structure of B. tabaci biotype Q populations. Results suggest that there were at least 2 invasions of Taiwan. The genetic structure of the Fusing population (Taoyuan County, northwestern Taiwan) possesses molecular characteristics, suggesting that the population initiated from an independent invasion. Furthermore, great gene flow and slight genetic differentiation among populations in Taiwan were shown by violating the isolation by distance expectation. The migration of individuals between greenhouses may be caused by the movement of poinsettias between greenhouses and other human activities. The program of pest management should prescribe the plantlet trade regulation to avoid further dispersal of B. tabaci Q biotype among greenhouses in Taiwan. Chiun-Cheng Ko 柯俊成 2009 學位論文 ; thesis 78 zh-TW |
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碩士 === 國立臺灣大學 === 昆蟲學研究所 === 97 === The sweetpotato whitefly, Bemisia tabaci, is among the top 100 invasive pests in the world. This species causes serious agricultural damages in many countries. More than 26 biotypes have been detected worldwide. Recently, biotype Q was reported as a new invasive pest globally which has spread throughout the world with the trade of poinsettia (Euphorbia pulcherimma). In 2006, biotype Q was first recorded at the World Vegetable Center in Tainan, Taiwan. After wards, 791 samples were collected in Taiwan. Biotype Q was found in 7 poinsettia greenhouses, but not in the field. I hypothesized that it is in the early stages of invasion. Determining the origin of this invasion is important for importing quarantine. This study provides information for eradication program, and further introductions and reinvasions will hopefully be avoided by applying intensive quarantine regulations on possible invasion routes. Using mitochondrial cytochrome oxidase I (COI) sequences as a molecular marker to study phylogeography, I explored genetic differences and dispersal patterns of B. tabaci biotype Q in the world by reconstructing a minimum spanning network. The origin of biotype Q-related biotypes was in Central and West Africa. However, the origin of biotype Q was somewhere between Europe and Asia, and then it spread into Europe by natural dispersal. Recent invasion events in the world of biotype Q were from Europe. This suggests that it spread by human trade. Moreover, I applied 12 microsatellite loci by means of multiplex polymerase chain reaction (PCR) to investigate phylogenetic relationships and the population structure of B. tabaci biotype Q populations. Results suggest that there were at least 2 invasions of Taiwan. The genetic structure of the Fusing population (Taoyuan County, northwestern Taiwan) possesses molecular characteristics, suggesting that the population initiated from an independent invasion. Furthermore, great gene flow and slight genetic differentiation among populations in Taiwan were shown by violating the isolation by distance expectation. The migration of individuals between greenhouses may be caused by the movement of poinsettias between greenhouses and other human activities. The program of pest management should prescribe the plantlet trade regulation to avoid further dispersal of B. tabaci Q biotype among greenhouses in Taiwan.
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author2 |
Chiun-Cheng Ko |
author_facet |
Chiun-Cheng Ko Yi-Hsien Chiang 蔣宜弦 |
author |
Yi-Hsien Chiang 蔣宜弦 |
spellingShingle |
Yi-Hsien Chiang 蔣宜弦 Population genetics and the origin of new invasive biotype Q of Bemisia tabaci (Hemiptera: Aleyrodidae) in Taiwan |
author_sort |
Yi-Hsien Chiang |
title |
Population genetics and the origin of new invasive biotype Q of Bemisia tabaci (Hemiptera: Aleyrodidae) in Taiwan |
title_short |
Population genetics and the origin of new invasive biotype Q of Bemisia tabaci (Hemiptera: Aleyrodidae) in Taiwan |
title_full |
Population genetics and the origin of new invasive biotype Q of Bemisia tabaci (Hemiptera: Aleyrodidae) in Taiwan |
title_fullStr |
Population genetics and the origin of new invasive biotype Q of Bemisia tabaci (Hemiptera: Aleyrodidae) in Taiwan |
title_full_unstemmed |
Population genetics and the origin of new invasive biotype Q of Bemisia tabaci (Hemiptera: Aleyrodidae) in Taiwan |
title_sort |
population genetics and the origin of new invasive biotype q of bemisia tabaci (hemiptera: aleyrodidae) in taiwan |
publishDate |
2009 |
url |
http://ndltd.ncl.edu.tw/handle/63692318200896873372 |
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