Disentangling the worldwide invasion process of Halyomorpha halys through approximate Bayesian computation.

IF 3.1 2区 生物学 Q2 ECOLOGY
Rajiv Boscolo Agostini, Maria Teresa Vizzari, Andrea Benazzo, Silvia Ghirotto
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引用次数: 0

Abstract

Halyomorpha halys is a polyphagous insect pest, which was first found outside its native regions in 1996, and since then it has rapidly spread worldwide causing damage to agriculture. Investigating the genetic diversity among H. halys populations is essential to understand the colonization history out of its native areas. Analyses based on mtDNA indicate multiple invasions from Asia to European and American continents, as well as serial invasions within invaded countries, but the colonization dynamics are still debated. Recently, genome-wide data (ddRAD) have been published to investigate the genomic structure of H. halys, proposing China as a putative source of multiple serial invasion events to Europe and the Americas. In this study we re-analyze published ddRAD sequences from worldwide populations of H. halys to better elucidate the colonization process. We assessed the genetic diversity in native populations identifying genetic differentiation between populations in China. Furthermore, we observed a complex pattern of population structure in the invaded countries, that may have originated from the occurrence of multiple independent colonization waves through time, from sub-populations present in the native range to Europe and the Americas. We tested alternative colonization hypotheses through Approximate Bayesian Computation comparison of demographic scenarios. Our results support multiple waves of migration from East China to invaded territories and the occurrence of European and American bridgehead effects. These results underline the importance of demographic inference through genome-wide data to investigate biological invasions, whose knowledge become fundamental to establish new strategies of management and control of invasive species.

通过近似贝叶斯计算厘清Halyomorpha halys的全球入侵过程
哈雷虫(Halyomorpha halys)是一种多食性害虫,1996年首次在原产地以外的地区被发现,此后迅速蔓延到世界各地,对农业造成了破坏。调查H. halys种群的遗传多样性对于了解其离开原产地的殖民历史至关重要。基于 mtDNA 的分析表明,哈雷虫从亚洲多次入侵到欧洲和美洲大陆,并在被入侵国家内连续入侵,但对其殖民动态仍有争议。最近发表的全基因组数据(ddRAD)研究了H. halys的基因组结构,提出中国可能是多次向欧洲和美洲连续入侵的源头。在本研究中,我们重新分析了已发表的哈雷鱼全球种群的 ddRAD 序列,以更好地阐明哈雷鱼的殖民过程。我们评估了原生种群的遗传多样性,发现了中国种群之间的遗传分化。此外,我们在被入侵国家观察到了复杂的种群结构模式,这可能源于多次独立的殖民浪潮,从原生地的亚种群到欧洲和美洲。我们通过近似贝叶斯计算比较人口学情景,测试了其他殖民假说。我们的结果支持从华东向被入侵地区的多波迁徙以及欧洲和美洲桥头堡效应的发生。这些结果凸显了通过全基因组数据进行人口推断对研究生物入侵的重要性,而人口推断的知识已成为制定管理和控制入侵物种新策略的基础。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Heredity
Heredity 生物-进化生物学
CiteScore
7.50
自引率
2.60%
发文量
84
审稿时长
4-8 weeks
期刊介绍: Heredity is the official journal of the Genetics Society. It covers a broad range of topics within the field of genetics and therefore papers must address conceptual or applied issues of interest to the journal''s wide readership
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