Population structure and gene flow in the global pest, Helicoverpa armigera
作者： C. J. Anderson , W. T. Tay , A. McGaughran , K. Gordon , T. K. Walsh
DOI: 10.1111/MEC.13841
关键词:
摘要: Helicoverpa armigera is a major agricultural pest that distributed across Europe, Asia, Africa and Australasia. This species hypothesized to have spread the Americas 1.5 million years ago, founding population at present, distinct species, zea. In 2013, H. armigera was confirmed re-entered South America via Brazil subsequently spread. The source of recent incursion unknown structure in poorly resolved, but basic understanding would highlight potential biosecurity failures determine evolutionary history region-specific lineages. Here, we integrate several end points derived from high-throughput sequencing assess gene flow H. zea populations six continents. We first assemble mitochondrial genomes demonstrate phylogenetic relationship with other Heliothine lack distinction between populations. use de novo genotyping-by-sequencing whole-genome sequences aligned bacterial artificial chromosomes, levels admixture. Primarily, find Brazilian are diverse populations, strong signals European as well prevalent Asian African ancestry. also field-caught hybrid H. zea, able provide genomic support for presence conferta subspecies While among bulk remains unresolved, present distinctions pertinent future investigations threat posed by H. armigera.
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