首页> 外文期刊>Insect Systematics and Diversity >Phylogeography of Walnut-Infesting Rhagoletis suavis (Diptera: Tephritidae) Flies
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Phylogeography of Walnut-Infesting Rhagoletis suavis (Diptera: Tephritidae) Flies

机译:核桃浸入rhagoletis甜(双翅目:tephritidae)苍蝇的植物地理学

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摘要

Discerning the biogeography and historical ranges of organisms is important to understanding the processes causing population divergence and speciation. Mountainous regions in North America have contributed to widespread divergence within animals andplants as species become geographically isolated and diverge. Here, we investigate patterns of divergence for six species of walnut-infesting flies in the Rhagoletis suavis species group (Diptera: Tephritidae) in the United States and Mexico based on sequence analysis of mitochondrial DNA (mtDNA) encoded Cytochrome Oxidase I and II genes (COI and COII). We resolved the relationship of the newly described species, Rhagoletis ramosae, found in the highlands of Mexico, within the R. suavis species group totest alternate hypotheses of migration and divergence. Bayesian phylogenetic analysis supported a clade in which R. ramosae was most closely related to Rhagoletis zoqui/Rhagoletis completa, found in eastern Mexico. This implies that the Sierra Madre Oriental and not the Sierra Madre Occidental have been a major conduit of migration, isolation, and speciation for walnut flies between Mexico and the United States. Comparisons of mtDNA divergence for R. suavis group flies with the Rhagoletis pomonella andRhagoletis cingulata species groups suggested that despite current similarities in geographic distributions, these taxa do not share a common biogeographic history, diverging in different regions at different times in the past. Patterns displayed by Rhagoletis flies can be compared to patterns seen in other organisms through the Southwestern and Eastern United States, and Mexico to develop a fuller understanding of the biogeography of these regions of North America.
机译:辨别生物体的生物地理学和历史范围对于理解导致种群差异和物种形成的过程很重要。随着物种在地理上孤立和分歧时,北美的山区已导致动物和植物内部的广泛差异。在这里,我们研究了美国和墨西哥的rhagoletis suavis suavis物种群(双翅目:tephritidae)中六种核桃烟蝇的差异模式,该模式基于线粒体DNA(mtDNA)的序列分析(MTDNA)编码的细胞染料酶I和II基因的序列分析。 COI和COII)。我们解决了在墨西哥高地发现的新描述的物种Rhagoletis ramosae的关系,在R. Suavis物种群中,迁移和分歧的替代假设。贝叶斯的系统发育分析支持了一个进化枝,其中R. r. r. r. r. r. r. r. r. r. r. r. r. r. r. romosae与rhagoletis zoqui/rhagoletis poteria,在墨西哥东部发现。这意味着墨西哥和美国之间核桃蝇的移民,隔离和物种形成的主要渠道,这意味着东方塞拉山脉而不是塞拉山脉。 MtDNA差异的比较suavis群与rhagoletis pomonella andrhagoletis cingulata群体的苍蝇群群群,表明,尽管当前地理分布中的当前相似性,这些分类单元并未共享常见的生物地理历史,在过去的不同时间内在不同地区有不同的不同时间。可以将Rhagoletis Flies展示的模式与通过美国西南部和东部的其他生物体中看到的模式进行比较,以及墨西哥对北美这些地区的生物地理学有更深入的了解。

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