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首页> 外文期刊>Journal of Medical Entomology >Divergence of Lutzomyia (Psathyromyia) shannoni (Diptera: Psychodidae: Phlebotominae) Is Indicated by Morphometric and Molecular Analyses When Examined Between Taxa From the Southeastern United States and Southern Mexico
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Divergence of Lutzomyia (Psathyromyia) shannoni (Diptera: Psychodidae: Phlebotominae) Is Indicated by Morphometric and Molecular Analyses When Examined Between Taxa From the Southeastern United States and Southern Mexico

机译：在美国东南部和墨西哥南部的分类群之间进行形态计量和分子分析表明，Lutzomyia（Psathyromyia）shannoni（Diptera：Psychodidae：Phlebotominae）的发散

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摘要

The medically important sand fly Lutzomyia shannoni (Dyar 1929) was collected at eight different sites: seven within the southeastern United States and one in the state of Quintana Roo, Mexico. A canonical discriminant analysis was conducted on 40 female L. shannoni specimens from each of the eight collection sites (n = 320) using 49 morphological characters. Four L. shannoni specimens from each of the eight collection sites (n = 32) were sent to the Barcode of Life Data systems where a 654-base pair segment of the cytochrome c oxidase subunit 1 (CO1) genetic marker was sequenced from each sand fly. Phylogeny estimation based on the COI segments, in addition to genetic distance, divergence, and differentiation values were calculated. Results of both the morphometric and molecular analyses indicate that the species has undergone divergence when examined between the taxa of the United States and Quintana Roo, Mexico. Although purely speculative, the arid or semiarid expanse from southern Texas to Mexico City could be an allopatric barrier that has impeded migration and hence gene flow, resulting in different morphology and genetic makeup between the two purported populations. A high degree of intragroup variability was noted in the Quintana Roo sand flies.
机译：具有重要医学意义的沙蝇Lutzomyia shannoni（Dyar，1929年）在八个不同的地点收集：美国东南部的七个地点和墨西哥金塔纳罗奥州的一个地点。对来自八个采集点（n = 320）中每一个的40个雌性香农L. Shannoni标本进行了典型判别分析，使用49个形态学特征。将八个收集地点（n = 32）中的每个地点的四个香农标本送入生命数据条形码系统，在该系统中，从每个沙子中测序出细胞色素c氧化酶亚基1（CO1）遗传标记的654个碱基对片段飞。除了遗传距离，差异和分化值外，还基于COI片段进行系统发育估计。形态分析和分子分析的结果均表明，在美国的分类群和墨西哥的金塔纳罗奥州之间进行检查时，该物种已发生分歧。尽管纯粹是推测性的，但从得克萨斯州南部到墨西哥城的干旱或半干旱地区可能是异种屏障，阻碍了移民并因此阻碍了基因流动，导致了两个据称种群之间的形态和遗传组成不同。在金塔纳罗奥州的沙蝇中观察到高度的组内变异性。

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