中国荻草谷网蚜种群结构研究

doi:10.1016/S2095-3119(20)63445-1

摘要/Abstract

摘要：

荻草谷网蚜是一种在中国温带地区对小麦作物最具破坏性的蚜虫。但是关于这种蚜虫的遗传结构以及不同地理位置对种群的影响却知之甚少。在本研究中，我们通过使用一个线粒体基因COI，一个核基因EF-1α，以及两个内共生菌布赫纳氏菌基因gnd和trpA分析了中国18个地理种群，从而研究了荻草谷网蚜的种群遗传结构和种群历史动态。各群体的数据分析显示单倍型多样性高，核苷酸变异低。SAMOVA分析没有发现遗传距离和地理距离之间的相关性。然而，种群多样性较高的地区具有较高的单倍型多样性。因此，我们推测，在中国荻草谷网蚜的自然迁移途径主要有两条。一条路径是从云南到四川盆地，另外一条是从武汉、信阳、胶东半岛地区到西北地区。基于这一假设，我们推断这些蚜虫首先出现在西南和南部地区，并在东南和西南季风的帮助下于春夏季在北方发生。秋季，蚜虫随东北和西北季风向南扩散。

Abstract: The wheat aphid, Sitobion miscanthi, is one of the most destructive pests of wheat plants in the temperate regions of China. Little is known about the genetic structure evolution of the different geographic populations of S. miscanthi with its migration. In this study, we investigated the population genetic structure and demographic history of S. miscanthi by analysing 18 geographical populations across China using one mitochondrial gene, COI; one nuclear gene, EF-1α; and two endosymbiont Buchnera genes, gnd and trpA. Analysis of data from the various groups showed high haplotype diversity and low nucleotide variation. SAMOVA analysis did not find a correlation between genetic distance and geographic distance. However, areas with high population diversity exhibited high haplotype diversity. Therefore, we speculate that there are two main natural migration pathways of S. miscanthi in China. One is from Yunnan to the Sichuan Basin, and the other is from Wuhan, Xinyang and Jiaodong Peninsula areas to the northwest. Based on this hypothesis, we inferred that these aphid populations appear first in the southwestern and southern regions and spread to the north with the help of the southeastern and southwestern monsoons, which occur in spring and summer. In autumn, the aphids spread southward with the northeastern and northwestern monsoons.

Key words: Sitobion miscanthi , molecular marker , COI , symbiotic bacteria , phylogenetic tree

. 中国荻草谷网蚜种群结构研究 [J]. Journal of Integrative Agriculture, 2022, 21(1): 178-187.

SUN Jing-xuan, LI Qian, TAN Xiao-ling, FAN Jia, ZHANG Yong, QIN Yao-guo, Frédéric FRANCIS, CHEN Ju-lian. Population genetic structure of Sitobion miscanthi in China[J]. Journal of Integrative Agriculture, 2022, 21(1): 178-187.

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