Population Genomics and Genetic Diversity of the Invasive Chrysanthemum Lace Bug (Corythucha Marmorata) Across Its Invasive Range in Japan

Abstract

Abstract The escalating global movement of alien species, facilitated by increased trade and travel, poses a pressing need to comprehend their invasive potential and the consequent ecological and economic ramifications. Despite a growing body of evidence on rapid evolutionary shifts in invasive species, comprehensive insights into the genetic variability underlying these adaptations are constrained by limited genomic resources. Understanding the role of genetic variation in the success or failure of biological invaders is crucial,. This study focuses on the chrysanthemum lace bug, Corythucha marmorata, as a model 2system to investigate the interplay of genetic variation, local adaptation, and invasion dynamics. Our analysis reveals a low genetic structure among countries, with significant genetic differentiation observed within populations. The scarcity of private alleles suggests a limited number of independent sources for the invader populations. Furthermore, the prevalence of a single genetic cluster indicates potential novel-selection pressures, potentially influenced by the host plant. The lace bug's specialization on goldenrod is emphasized despite reports of exploiting various hosts.