Population genetic structure and migration patterns of Dendrothrips minowai (Thysanoptera: Thripidae) in Guizhou, China

详细信息    查看全文

• 作者：Zhao-yun Lyu ; Jun-rui Zhi ; Yu-feng Zhou ; Ze-hong Meng and Juan Wen
• 刊名：Entomological Science
• 出版年：2017
• 出版时间：January/December 2017
• 年：2017
• 卷：20
• 期：1
• 页码：127-136
• 全文大小：443K
• ISSN：1479-8298

文摘

Dendrothrips minowai Priesner (Thysanoptera: Thripidae) is one of the most destructive insect pests on tea plants. Although outbreaks of this pest occur annually in South China, especially in Guizhou Province, little is known about its population genetics, such as genetic diversity and gene flow. To investigate its population genetic structure and migration routes in Guizhou Province, we analyzed 24 D. minowai populations across Guizhou using six microsatellite loci. We detected the moderate genetic diversity and the population genetic structure of this thrip species. Neighbor-joining (NJ) phylogenetic tree and STRUCTURE analyses recognized two clusters within the studied populations. No correlation between genetic and geographical distances (r = 0.0139, P = 0.5830) was detected and more than 89% of the variation occurred among samples within populations. Gene flow analysis revealed high migration rates (74.0 – 894.1) among D. minowai populations. Overall, the trend of asymmetrical gene flow was from northeast to southwest. Our analyses demonstrated that D. minowai derived or originated from multiple sites and could be eventually divided into two groups in Guizhou.