Whole genome resequencing of pink stem borer (Part 1/4)

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 dist..., ,

阐明生境扩张过程中的适应性进化遗传机制，对于害虫防控具有重要意义。粉色茎螟（pink stem borer, PSB，学名：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度以南区域。然而，随着全球气候变化与耕作模式的改变，该蛾类的分布范围已逐步突破北纬34度的传统界限，扩散至华北大部分区域。但目前学界对该物种的进化过程与本地适应性演化机制仍缺乏充分认知。本研究通过基因组重测序技术，对中国14个地理种群的样本进行基因分型，共获得超过100万个高质量单核苷酸多态性（single nucleotide polymorphism, SNPs）位点与2万个结构变异（structural variation, SVs）。研究共划分出3个高度分化的遗传类群，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距离及环境距离呈高度相关……