Journal of Pest Science (2018) 91:539–550
Population genetic structure and expansion patterns of the cotton
pest Adelphocoris fasciaticollis
· Wanzhi Cai
· Junyu Luo
· Shuai Zhang
· Wendan Li
· Chunyi Wang
· Limin Lv
· Jinjie Cui
Received: 28 April 2017 / Revised: 2 November 2017 / Accepted: 20 November 2017 / Published online: 25 November 2017
© Springer-Verlag GmbH Germany, part of Springer Nature 2017
Understanding the population genetic structure and demographic dynamics of important agricultural pest insects is very
important in studying insecticide resistance and control strategies. The plant bug Adelphocoris fasciaticollis (Reuter) (Hemip-
tera: Miridae) is one of the main insect pests on cotton in Northern China. We studied large-scale genetic structure and genetic
diversity patterns and explored the demographic history. We also employed a phylogeographical approach on A. fasciaticollis
samples using sequence data from mitochondrial DNA (mtDNA) and nuclear DNA (ncDNA). MtDNA showed a signiﬁcant
correlation between genetic and geographical distances, but ncDNA did not support this correlation. Both datasets revealed
that A. fasciaticollis populations had experienced recent expansion and lacked a geographical structure. One reason for lack
of a genetic structure is a high level of gene ﬂow among the populations. We suggest that the strong ﬂight capability of A.
fasciaticollis has been aided by the East Asian monsoon and cold fronts to accelerate the rate of range expansion. In addition,
decreased insecticide usage and disturbances from human activities may all have contributed to population expansion. The
low eﬀective population number was based on two datasets. It is suggested that the host crop use, local climate conditions,
and the recent population expansion might be the main inﬂuencing factors.
Keywords Recent expansion · Eﬀective population size · Genetic diversity · Genetic structure · Mitochondrial and nuclear
Adelphocoris fasciaticollis is an important pest of cotton
and other crops. The population genetics of A. fasciati-
collis throughout Northern China remain unclear.
This study estimated the population structure and expan-
sion patterns of A. fasciaticollis in Northern China.
We speculated that the forces that drive population
expansion are in agroecosystems and identiﬁed the driv-
ers of the current geographical structure.
Our ﬁndings provide an important theoretical basis for
developing new strategies of biological control against
Adelphocoris fasciaticollis (Reuter) (Hemiptera: Miridae)
is an indigenous insect pest mainly distributed in Northern
China, particularly in the Yellow River cotton region. With
the wide-scale adoption of cotton engineered to produce
insecticidal proteins from the bacterium Bacillus thuringien-
sis (Bt) in China and the decreased usage of broad-spectrum
insecticides, A. fasciaticollis has become the main pest on
cotton and other crops (Wu et al. 2002). This is because the
Bt protein only kills Lepidoptera insect pests such as the
cotton bollworm, Helicoverpa armigera, but is not toxic to
Communicated by B. Lavandero.
Electronic supplementary material The online version of this
article (https://doi.org/10.1007/s10340-017-0939-8) contains
supplementary material, which is available to authorized users.
* Jinjie Cui
State Key Laboratory of Cotton Biology, Institute of Cotton
Research of CAAS, Anyang 455000, China
Department of Entomology, China Agricultural University,
Beijing 100193, China