Journal
GENOME BIOLOGY AND EVOLUTION
Volume 13, Issue 4, Pages -Publisher
OXFORD UNIV PRESS
DOI: 10.1093/gbe/evab053
Keywords
genome; long-read sequencing; polishing; PoolSeq; Pieris; evolutionary trap
Categories
Funding
- Stanford Undergraduate Field Studies program
- Max Planck Society
- Carl Tryggers Stiftelse anslag [CTS 18:415]
- Japan Society for the Promotion of Science [202060676]
- Swedish Research Council [2017-04386]
- Vinnova [2017-04386] Funding Source: Vinnova
- Swedish Research Council [2017-04386] Funding Source: Swedish Research Council
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This study presents a chromosome-level assembly of Pieris macdunnoughii, a North American butterfly, generated using a combination of sequencing technologies. The results include assembly data, chromosomal framework, and comparative analysis with a European butterfly species, providing insights into the genetic basis of adaptive and maladaptive behaviors in insects and their susceptibility to evolutionary traps.
We reporta chromosome-level assembly for Pierismacdunnoughii, a North American butterfly whose involvement in an evolutionary trap imposed by an invasive Eurasian mustard has made it an emerging model system for studying maladaptation in plant-insect interactions. Assembled using nearly 100x coverage of Oxford Nanopore long reads, the contig-level assembly comprised 106 contigs totaling 316,549,294 bases, with an N50 of 5.2Mb. We polished the assembly with PoolSeq Illumina short-read data, demonstrating for the first time the comparable performance of individual and pooled short reads as polishing data sets. Extensive synteny between the reported contig-level assembly and a published, chromosome-level assembly of the European butterfly Pieris napi allowed us to generate a pseudochromosomal assembly of 47 contigs, placing 91.1% of our 317 Mb genome into a chromosomal framework. Additionally, we found support for a Z chromosome arrangement in P. napi, showing that the fusion event leading to this rearrangement predates the split between European and North American lineages of Pieris butterflies. This genome assembly and its functional annotation lay the groundwork for future research into the genetic basis of adaptive and maladaptive egg-laying behavior by P. macdunnoughii, contributing to our understanding of the susceptibility and responses of insects to evolutionary traps.
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