Sourakov Andrei, Zhang Jing, Cong Qian, Song Leina, Grishin Nick V
McGuire Center for Lepidoptera & Biodiversity, Florida Museum of Natural History, Gainesville, Florida, USA.
Department of Biophysics, University of Texas Southwestern Medical Center, Dallas, Texas, USA.
J Appl Entomol. 2022 Dec;146(10):1225-1229. doi: 10.1111/jen.13082. Epub 2022 Sep 21.
During the last 10 years, the Erythrina stem borer moth, , emerged as a pest of cultivated coral trees ( spp.) in California. Erythrina trees are valued for their moderate drought resistance and beautiful flame-like flowers. They are beloved enough to be considered Los Angeles's official "City Tree." Thus, they are a valuable horticultural crop and are grown by many nurseries and occur throughout the landscape in coastal southern California. Coral trees have been heavily affected by recently. Using whole genome sequencing techniques, we analysed the origins of this and other infestations of in coastal areas and found that they have likely originated from the repeated expansions of the native range of the species in Arizona, a process possibly driven by climatic factors and/or movement of plants by humans. We also found sufficient genetic differences between the western population of the moth and the rest of the New World populations to describe a new western subspecies, Sourakov & Grishin ssp. n. (type locality USA: CA, San Diego Co., La Jolla). These findings are of economic importance for future attempts to control the moth's impact on activities surrounding the horticultural use of spp. by the Californian landscape and nursery industries.
在过去10年里，刺桐蛀茎蛾（ ）成为加利福尼亚州人工种植刺桐树（ spp.）的一种害虫。刺桐树因其适度的抗旱能力和美丽的火焰状花朵而备受珍视。它们深受喜爱，以至于被视为洛杉矶的官方“市树”。因此，它们是一种有价值的园艺作物，许多苗圃都有种植，在南加州沿海地区的景观中随处可见。最近，刺桐树受到了严重影响。我们使用全基因组测序技术，分析了这种害虫以及沿海地区其他刺桐害虫侵扰的起源，发现它们可能源自亚利桑那州该物种原生范围的多次扩张，这一过程可能是由气候因素和/或人类对植物的迁移所驱动。我们还发现，该蛾类的西部种群与新世界其他种群之间存在足够的遗传差异，从而描述了一个新的西部亚种，即Sourakov & Grishin ssp. n.（模式产地：美国加利福尼亚州圣地亚哥县拉霍亚）。这些发现对于未来控制该蛾类对加利福尼亚州景观和苗圃行业刺桐树园艺用途相关活动的影响具有重要经济意义。
