A genome survey of Tetrix japonica (Insecta, Orthoptera) reveals a comparatively small Tetrigidae genome

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Abstract
The pygmy grasshopper, Tetrix japonica, is a common insect widely distributed in eastern Asia. To further investigate its genome characteristics, high-throughput sequencing was used to obtain genome survey data based on Illumina platforms. Analysis of the results showed that the genome size of T. japonica was 1.51 Gb based on K-mer analysis (K-mer = 23), while the size inferred by the flow cytometry (FCM) was 1.94 Gb. The percentage of repetitive sequence was 51.7%, with LINE being the most abundant element (15.46%) and SINE the least abundant element (0.19%). The genome size of T. japonica was relatively smaller compared to other orthopteran species, suggesting a fewer repetitive sequences. These genome survey data can be useful for genetic analysis and phylogenetic evolution of T. japonica and have potential utility in genomic and biological studies of orthopteran species.

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