The filtered genome-wide SNP dataset used for population genomic analyses of wing dimorphism in the pygmy grasshopper Tetrix japonica

This dataset contains the filtered genome-wide SNP dataset used for population genomic analyses of wing dimorphism in the pygmy grasshopper Tetrix japonica. The variant file is provided in compressed VCF format and includes high-quality biallelic SNPs retained after read mapping, variant calling, and quality filtering. The dataset was used for downstream analyses including principal component analysis, population structure inference, phylogenetic reconstruction, genome-wide genetic differentiation estimation, nucleotide diversity analysis, Tajima’s D calculation, and selection-scan analyses comparing long-winged and short-winged individuals. The VCF file contains SNPs mapped to the seven assembled chromosomes of the Tetrix japonica reference genome. Variants were filtered to remove low-quality sites, highly missing sites, rare variants below the minor allele frequency threshold, and sites with abnormal sequencing depth. Only SNPs passing the final filtering criteria were retained for downstream analyses.