Fall armyworm migration across the Lesser Antilles and the potential for genetic exchanges between North and South American populations.
Fall armyworm migration across the Lesser Antilles and the potential for genetic exchanges between North and South American populations.
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DOI：
10.1371/journal.pone.0171743
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发表时间：
2017
期刊：
影响因子：
3.7
通讯作者：
Westbrook J
中科院分区：
文献类型：
--
作者：
Nagoshi RN;Fleischer S;Meagher RL;Hay-Roe M;Khan A;Murúa MG;Silvie P;Vergara C;Westbrook J
草地贪夜蛾Spodoptera frugiperda（J.E. Smith）（鳞翅目：夜蛾科（Noctuidae）是西半球的一种重要农业害虫，以其广泛的宿主范围、长距离飞行能力和对杀虫剂产生抗性的倾向而闻名，所述杀虫剂包括转基因玉米品种中使用的那些杀虫剂的子集。这些特征加剧了秋粘虫对农业的威胁，在一个地理位置出现的抗性特征可能会迅速传播到整个半球。一个特别令人关切的区域是加勒比，那里从佛罗里达延伸到委内瑞拉的一系列岛屿为北美洲和南美洲的人口提供了一条潜在的迁徙通道，可以使他们之间的遗传相互作用持续不断。在这项研究中，调查人口从秘鲁，玻利维亚，巴拉圭，特立尼达和托巴哥扩大以前的工作在南美洲，表明一个普遍同质的人口方面的单倍型标记。这一人口不同于发现在小安的列斯群岛的遗传和气象观测相结合的描述，表明秋季粘虫迁移从波多黎各远南巴巴多斯，但不支持重大入侵特立尼达和托巴哥和南美洲。空运预测表明，加勒比区域的风型不利于小安的列斯群岛沿着南北方向持续飞行，这支持了这样的结论，即这种迁徙是小规模和零星的，几乎没有提供遗传交换的机会。这些研究结果的影响，传播有害性状之间的两个西半球大陆进行了讨论。
The fall armyworm, Spodoptera frugiperda (J. E. Smith)(Lepidoptera: Noctuidae), is an important agricultural pest of the Western Hemisphere noted for its broad host range, long distance flight capabilities, and a propensity to develop resistance to pesticides that includes a subset of those used in genetically modified corn varieties. These characteristics exacerbate the threat fall armyworm poses to agriculture, with the potential that a resistance trait arising in one geographical location could rapidly disseminate throughout the hemisphere. A region of particular concern is the Caribbean, where a line of islands that extends from Florida to Venezuela provides a potential migratory pathway between populations from North and South America that could allow for consistent and substantial genetic interactions. In this study, surveys of populations from Peru, Bolivia, Paraguay, and Trinidad & Tobago expand on previous work in South America that indicates a generally homogeneous population with respect to haplotype markers. This population differs from that found in most of the Lesser Antilles where a combination of genetic and meteorological observations is described that indicate fall armyworm migration from Puerto Rico to as far south as Barbados, but does not support significant incursion into Trinidad & Tobago and South America. Air transport projections demonstrate that the wind patterns in the Caribbean region are not conducive to consistent flight along the north-south orientation of the Lesser Antilles, supporting the conclusion that such migration is minor and sporadic, providing few opportunities for genetic exchanges. The implications of these findings on the dissemination of deleterious traits between the two Western Hemisphere continents are discussed.