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首页> 外文期刊>African Entomology >Genetic variation and invasion pattern of the Arabian rhinoceros beetle, Oryctes agamemnon arabicus (Burmeister) (Coleoptera: Scarabaeidae), in Tunisia, deduced from mitochondrial DNA sequences.
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Genetic variation and invasion pattern of the Arabian rhinoceros beetle, Oryctes agamemnon arabicus (Burmeister) (Coleoptera: Scarabaeidae), in Tunisia, deduced from mitochondrial DNA sequences.

机译：根据线粒体DNA序列推导，突尼斯的阿拉伯犀牛甲虫（Omectes agamemnon arabicus（Burmeister）（Coleoptera：Scarabaeidae））的遗传变异和入侵方式。

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摘要

The Arabian rhinoceros beetle, Oryctes agamemnon arabicus (Burmeister, 1847), is an invasive species, introduced to Tunisia from the United Arab Emirates and causing serious damage to date palm trees in southern Tunisia. Considering the economic importance of this pest, it is necessary to understand the genetic diversity within and among its populations and investigate its dispersal mode. In the present study, the mitochondrial gene encoding the cytochrome oxidase subunit I (COI) was used to analyse the extent of genetic variation between samples of O. agamemnon arabicus, collected from geographically distant locations in Tunisia. A 505 bp DNA fragment, resulting from PCR amplification, was sequenced. Representative sequences were aligned, revealing nine polymorphic sites that identified eight haplotypes. Haplotype diversity (Hd) and Tajima's D neutral test were 0.707 and -0.043, respectively, indicating a low level of mtDNA variability. The calculated gene flow value was Nm=0.47, indicating a high amount of gene flow occurring between populations from Tozeur and those from Kebili, although both departments are separated by the Chott-El-Jerid salt lake. The presence of common haplotypes between Tozeur and Kebili as well as the clustering pattern obtained by the NJ method confirmed this result. Based on these facts and considering the limited flight of O. agamemnon arabicus and its slow reproduction, it is likely that its expansion in Tunisia was facilitated mainly by human transportation of infected offshoots.
机译：阿拉伯犀牛甲虫Oryctes agamemnon arabicus（Burmeister，1847）是一种入侵物种，从阿拉伯联合酋长国引入突尼斯，对突尼斯南部的枣椰树造成了严重破坏。考虑到该有害生物的经济重要性，有必要了解其内部和种群之间的遗传多样性并研究其扩散方式。在本研究中，编码细胞色素氧化酶亚基I（COI）的线粒体基因用于分析突尼斯O. agamemnon拟南芥样品之间遗传变异的程度。 PCR扩增得到的505 bp DNA片段被测序。比对代表性序列，揭示鉴定出八种单倍型的九个多态位点。单倍型多样性（Hd）和田岛的D中性检验分别为0.707和-0.043，表明mtDNA变异性较低。计算得出的基因流量值为Nm = 0.47，这表明Tozeur种群和Kebili种群之间存在大量基因流，尽管两个部门都被Chott-El-Jerid盐湖隔开。 Tozeur和Kebili之间常见的单倍型的存在以及通过NJ方法获得的聚类模式证实了这一结果。基于这些事实，并考虑到阿加门农拟南芥的有限飞行和繁殖缓慢，很可能主要是通过人类运输受感染的分支而促进其在突尼斯的扩展。

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