Phylogeography of the Assassin Bug Sphedanolestes impressicollis in East Asia Inferred From Mitochondrial and Nuclear Gene Sequences
Phylogeography of the Assassin Bug Sphedanolestes impressicollis in East Asia Inferred From Mitochondrial and Nuclear Gene Sequences
复制标题
从线粒体和核基因序列推断东亚刺蝽Sphedanolestes impressicollis 的系统发育地理学
DOI：
10.3390/ijms20051234
复制
发表时间：
2019-03-01
影响因子：
5.6
通讯作者：
Li, Hu
中科院分区：
文献类型：
--
作者：
Du, Zhenyong;Ishikawa, Tadashi;Li, Hu
刺蝽（半翅目：刺蝽科）广泛分布于东亚地区。它是评价气候波动和地理事件对东亚芦苇分布格局影响的理想模型。在中国、日本、韩国、越南和老挝等地，利用2个线粒体基因和1个核基因，研究了刺客蝽的系统地理分布格局。在划分为北部和南部群体的地理种群中发现了高度的遗传分化。遗传距离和地理距离之间存在显著的相关性。东海陆桥在更新世冰期起到了“扩散走廊”的作用。估计的分化时间表明，在“琉球珊瑚海阶段”，海平面迅速上升，东海陆桥完全被淹没时，北方种群可能与中国东部种群分离。人口统计学历史和生态位模型表明，适当的气候条件可能是晚更新世期间在朝鲜半岛和日本迅速蔓延的原因。我们的研究强调了更新世海平面变化和气候波动在确定东亚生物分布模式中的关键作用。
The assassin bug, Sphedanolestes impressicollis (Hemiptera: Reduviidae), is widely distributed in East Asia. It is an ideal model for evaluating the effects of climatic fluctuation and geographical events on the distribution patterns of East Asian reduviids. Here, we used two mitochondrial genes and one nuclear gene to investigate the phylogeographic pattern of the assassin bug based on comprehensive sampling in China, Japan, South Korea, Vietnam, and Laos. High levels of genetic differentiation were detected among the geographic populations classified into the northern and southern groups. A significant correlation was detected between genetic and geographical distances. The East China Sea land bridge served as a “dispersal corridor” during Pleistocene glaciation. The estimated divergence time indicated that the northern group may have separated from the eastern Chinese populations when the sea level rapidly rose during the “Ryukyu Coral Sea Stage” and the East China Sea land bridge was completely submerged. Demographic history and ecological niche modeling suggested that appropriate climatic conditions may have accounted for the rapid spread across the Korean Peninsula and Japan during the late Pleistocene. Our study underscores the pivotal roles of the Pleistocene sea level changes and climatic fluctuations in determining the distribution patterns of East Asian reduviids.