The locust genome provides insight into swarm formation and long-distance flight
Locusts are one of the world’s most destructive agricultural pests and represent a useful model system in entomology. Here we present a draft 6.5 Gb genome sequence of Locusta migratoria, which is the largest animal genome sequenced so far. Our findings indicate that the large genome size of L. migratoria is likely to be because of transposable element proliferation combined with slow rates of loss for these elements. Methylome and transcriptome analyses reveal complex regulatory mechanisms involved in microtubule dynamic-mediated synapse plasticity during phase change. We find significant expansion of gene families associated with energy consumption and detoxification, consistent with long-distance flight capacity and phytophagy. We report hundreds of potential insecticide target genes, including cys-loop ligand-gated ion channels, G-protein-coupled receptors and lethal genes. The L. migratoria genome sequence offers new insights into the biology and sustainable management of this pest species, and will promote its wide use as a model system.
[…] We used 106 F1 individuals produced from a cross between two L. migratoria, one from the Hainan province and another from the laboratory-raised population, to perform RADseq. BWA (v. 0.6.2) was used to align the reads to the reference. SAMtools (v. 0.1.18) were used to call single-nucleotide polymorphism and filtering. A custom PERL script was developed to identify segregating polymorphic patterns and classify linkage groups. Marker ordering and spacing were carried out using JoinMap (v. 3.0). […]
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