A chromosome-level genome assembly of the chilli thrips Scirtothrips dorsalis Hood (Thysanoptera: Thripidae)
Busuulwa, A.; Liesenfelt, T.; Mongue, A. J.; Lahiri, S.
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Thrips are known for being pests of many agricultural crops, as well as vectors of plant viruses. Yet despite their economic importance, genomic resources for this group remain limited, and no chromosome-level genome has been available for the genus Scirtothrips. One such species is the chilli thrips, Scirtothrips dorsalis Hood (Thysanoptera: Thripidae). This invasive and highly polyphagous pest is established across much of the world and transmits several tospoviruses. Genomic resources would provide a new means to understand the traits that make thrips difficult to manage. Here, we present a chromosome-level genome assembly for S. dorsalis. The assembly is 266.5 Mb, with 96.9% of the sequence anchored in 16 chromosome-scale scaffolds. It contains 20,557 genes, and repetitive elements account for 28.8% of the sequence, which is comparable to those of other sequenced Thripidae. A species tree based on 3,019 single copy orthologs placed S. dorsalis as sister to Scirtothrips hansoni, with Scirtothrips most closely related to Frankliniella, Megalurothrips, and Odontothrips. The mitochondrial genome is a single circular molecule of 15,207 bp in which the sequence of the published mini circle is integrated, in contrast to the bipartite mitogenome previously reported for the same cryptic species.
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