Genomic analysis of population structure and target‐site mutations of Tetranychus trunctus in China

Resistance evolution in T. truncatus is tightly coupled with population history. The strong isolation of the SEC lineage maintains a distinct, independently evolved resistance profile (F331Y), limiting the ingress of northern haplotypes. Conversely, extensive anthropogenic gene flow in northern China has facilitated the widespread dispersal of the single-origin F331W and G328A mutations. These findings highlight that both historical divergence and human-mediated dispersal shape local resistance landscapes, necessitating region-specific management strategies.