Data from: Genome-wide analyses of the Bemisia tabaci species complex reveal contrasting patterns of admixture and complex demographic histories

Once considered a single species, the whitefly, Bemisia tabaci, is a
complex of numerous morphologically indistinguishable species. Within the
last three decades, two of its members (MED and MEAM1) have become some of
the world's most damaging agricultural pests invading countries
across Europe, Africa, Asia and the Americas and affecting a vast range of
agriculturally important food and fiber crops through both feeding-related
damage and the transmission of numerous plant viruses. For some time now,
researchers have relied on a single mitochondrial gene and/or a handful of
nuclear markers to study this species complex. Here, we move beyond this
by using 38,041 genome-wide Single Nucleotide Polymorphisms, and show that
the two invasive members of the complex are closely related species with
signatures of introgression with a third species (IO). Gene flow patterns
were traced between contemporary invasive populations within MED and MEAM1
species and these were best explained by recent international trade. These
findings have profound implications for delineating the B. tabaci species
status and will impact quarantine measures and future management
strategies of this global pest.

曾被误认为单一物种的烟粉虱（Bemisia tabaci），实则是由多个形态上无法区分的隐存物种构成的复合种群。
在过去三十年中，该复合种群内的两个类群（MED与MEAM1）已成为全球危害最严重的农业害虫之一：它们入侵了欧洲、非洲、亚洲及美洲的众多国家，并通过取食为害与传播多种植物病毒，对大量具有重要经济价值的粮食与纤维作物造成严重损害。
长期以来，研究者仅依靠单个线粒体基因及少量核标记开展该物种复合种群的相关研究。
本研究突破了这一局限，利用38041个全基因组范围的单核苷酸多态性（Single Nucleotide Polymorphisms, SNP）标记展开分析，结果显示该复合种群中的两个入侵类群为亲缘关系密切的物种，且存在与第三个类群（IO）的基因渐渗信号。
研究追溯了MED与MEAM1类群内当代入侵种群间的基因流模式，该模式最适宜以近期的国际贸易活动进行解释。
本研究结果对明确烟粉虱的物种界定具有深远意义，并将对这一全球性害虫的检疫措施制定与未来防控策略产生重要影响。

搜集汇总

背景与挑战

背景概述

该数据集提供了烟粉虱（Bemisia tabaci）物种复合体的全基因组分析数据，重点关注入侵物种MED和MEAM1的遗传结构和基因流模式。研究基于38,041个单核苷酸多态性（SNPs），揭示了物种间的亲缘关系和复杂的人口历史，这些发现对害虫管理和检疫措施具有重要意义。数据集包括VCF文件、脚本和SAM文件，支持基因组SNP调用和进一步分析。