Temporal Genetic Dynamics of an Invasive Species, Frankliniella occidentalis (Pergande), in an Early Phase of Establishment

Xian-Ming Yang,Jing-Tao Sun,Yi-Ming Zhu,Xiao-Feng Xue,Heng Lou,Xiao-Yue Hong

doi:10.1038/srep11877

Xian-Ming Yang, Jing-Tao Sun + Show 4 more

Open Access

https://doi.org/10.1038/srep11877

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Journal: Scientific Reports	Publication Date: Jul 3, 2015
Citations: 15	License type: CC BY 4.0

Affiliation: Nanjing Agricultural University

Abstract

Many species can successfully colonize new areas despite their propagules having low genetic variation. We assessed whether the decreased genetic diversity could result in temporal fluctuations of genetic parameters of the new populations of an invasive species, western flower thrips, Frankliniella occidentalis, using mitochondrial and microsatellite markers. This study was conducted in eight localities from four climate regions in China, where F. occidentalis was introduced in the year 2000 and had lower genetic diversity than its native populations. We also tested the level of genetic differentiation in these introduced populations. The genetic diversity of the samples at different years in the same locality was not significantly different from each other in most localities. FST and STRUCTURE analysis also showed that most temporal population comparisons from the same sites were not significantly differentiated. Our results showed that the invasive populations of F. occidentalis in China can maintain temporal stability in genetic composition at an early phase of establishment despite having lower genetic diversity than in their native range.

Highlights

Code KM09 KM10 KM11 KM12 BS09 BS12 DL09 DL11 DL12 GY09 GY11 QD09 Qingdao in 2012 (QD12) JQ09 JQ11 JQ12 SY09 SY11 SY12 HRB09 HRB10 HRB11 HRB12
We aimed to determine whether the genetic diversity, population size and the allele frequencies of the invasive populations changed and analyzed which factors might account for the temporal genetic dynamics
The southwestern and northern localities were warmer than the other localities and northwestern localities were drier than the other localities

Summary

Introduction

Code KM09 KM10 KM11 KM12 BS09 BS12 DL09 DL11 DL12 GY09 GY11 QD09 QD12 JQ09 JQ11 JQ12 SY09 SY11 SY12 HRB09 HRB10 HRB11 HRB12. Tagetes erecta L.; Hosta ventricosa (Salisb.) Stearn study revealed that these two forms simultaneously established in China[20] and that the genetic diversity of the recently introduced F. occidentalis populations in China is lower than that in its native range[20]. The decreased genetic diversity of F. occidentalis in China provides an opportunity to study the temporal genetic dynamics of recently introduced populations with lower genetic diversity. Such knowledge is crucial for the management of this species and for understanding the factors associated with invasion success. We used a large sampling scheme including eight localities distributed in four climate regimes in China to investigate the post-established dynamics of F. occidentalis populations using mitochondrial and nuclear markers. We aimed to determine whether the genetic diversity, population size and the allele frequencies of the invasive populations changed and analyzed which factors might account for the temporal genetic dynamics

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