Whole genome resequencing of pink stem borer (Part 4/4)

Understanding the genetic basis of adaptive evolution following habitat expansion can have important implications for pest management. The pink stem borer (PSB), Sesamia inferens (Walker), is a destructive pest of rice that was historically restricted to regions south of N34° latitude in China. However, with changes in global climate and farming practices, the distribution of this moth has progressively exceeded its traditional limit of 34° N and encompassed most regions in North China. However, the evolutionary processes and local adaptative changes of this species, are not yet fully understood. Here, we employed genome resequencing to genotype over 1 million of high‐quality SNPs and 20,000 SVs from 14 geographical populations across China. Three highly differentiated genetic groups were formed, corresponding to Northern and Southern China regions and the Yunnan-Guizhou Plateau. The pairwise genetic distance between locations was highly correlated with geographic and environmental dis...

解析生境扩张后的适应性演化遗传基础，对害虫防治具有重要指导意义。粉红色茎螟（pink stem borer, PSB）*Sesamia inferens* (Walker) 是一种水稻重大害虫，历史上其分布仅局限于中国北纬34°以南区域。然而，随着全球气候与耕作制度的变化，该蛾类的分布范围已逐步突破北纬34°的传统界限，覆盖了华北大部分区域。但目前学界对该物种的演化过程与本地适应性变化机制仍未完全阐明。本研究采用基因组重测序技术，对中国境内14个地理种群的超过100万个高质量单核苷酸多态性（single nucleotide polymorphisms, SNPs）与2万个结构变异（structural variations, SVs）进行基因分型。研究共鉴定出三个遗传分化显著的类群，分别对应中国华北、华南区域以及云贵高原。种群间的两两遗传距离与地理及环境因子存在显著相关性……