DOI: 10.1101/506162Dec 26, 2018Paper

Global invasion history of the world's most abundant pest butterfly: a citizen science population genomics study

BioRxiv : the Preprint Server for Biology
Sean F RyanDeWayne Shoemaker

Abstract

A major goal of invasion and climate change biology research is to understand the ecological and evolutionary responses of organisms to anthropogenic disturbance, especially over large spatial and temporal scales. One significant, and sometimes unattainable, challenge of these studies is garnering sufficient numbers of relevant specimens, especially for species spread across multiple continents. We developed a citizen science project, "Pieris Project", to successfully amass thousands of specimens of the invasive agricultural pest Pieris rapae, the small cabbage white butterfly, from 32 countries worldwide. We then generated and analyzed genomic (ddRAD) and mitochondrial DNA sequence data for these samples to reconstruct and compare different global invasion history scenarios. Our results bolster historical accounts of the global spread and timing of P. rapae introductions. The spread of P. rapae over the last ~160 years followed a linear series of at least four founding events, with each introduced population serving as the source for the next. We provide the first molecular evidence supporting the hypothesis that the ongoing divergence of the European and Asian subspecies of P. rapae (~1,200 yrBP) coincides with the domesticat...Continue Reading

Related Concepts

Mitochondria
Brassica rapa
Research
Spatial Distribution
Asians
DNA Sequence
Crops, Agricultural
Evolution, Molecular
Public Entity
Population Study (Research Activity)

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