阿根廷Chagas病媒感染三角虫种群的时空遗传结构

IF 2 2区 生物学 Q3 EVOLUTIONARY BIOLOGY
Alicia Raquel Pérez de Rosas, María Florencia Restelli, Beatriz Alicia García
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引用次数: 0

摘要

寄生三角蝽(Triatoma infestans,半翅目,Reduvidae)是南美洲10°~ 46°s地区恰加斯病的主要病媒,在精细尺度上分析其种群空间遗传结构可以深入了解寄生三角蝽的种群动态和进化过程,并为改进病媒控制策略提供补充方法。利用简单序列重复标记对不同群体的遗传结构进行了时空分析。2007年10月和2010年5月,在San Martín地区和一个周边地区(阿根廷卡塔马卡省Capayan省)的不同房屋捕获的234只个体中共检测到242个多态性条带。在两个时间样本的采集点之间检测到显著水平的遗传分化,包括同一房屋内的不同采样点。这些结果证实了感染弓形虫种群的高度细分。第一个和第二个样本的对比分析表明,它们属于两个不同的群体。与第一次捕获相比,第二次捕获的样品的遗传分化水平更高。很可能在细分的种群中,当有限的基因流动持续一段时间后,遗传漂变导致亚种群之间的分化加剧。空间自相关分析表明,色散范围在500 ~ 550 m左右。因此,在侵染区周围500 ~ 550 m半径范围内实施控制和监测,可以降低昆虫主动扩散的可能性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Spatio-temporal genetic structure in populations of the Chagas’ disease vector Triatoma infestans from Argentina

Spatio-temporal genetic structure in populations of the Chagas’ disease vector Triatoma infestans from Argentina

Triatoma infestans (Hemiptera, Reduvidae) is the main vector of Chagas disease in South America between the latitudes 10° and 46° S. The analysis of the spatial genetic structure of populations at fine scale can provide insight into the dynamic population and evolutionary process of T. infestans and a complementary approach to help improve vector control strategies. Spatio-temporal analysis of the genetic structure of T. infestans populations was performed using inter-simple sequence repeats markers. A total of 242 polymorphic bands were detected from 234 individuals captured in different houses from the locality of San Martín and in one surrounding area (Capayan department, Catamarca province, Argentina) in October 2007 and May 2010. Significant levels of genetic differentiation were detected among the collection sites in both temporal samples, including the different sampled sites within the same house. These results confirm a high degree of subdivision in T. infestans populations. Comparative analysis between the first and the second sample indicated that they form two different groups. The genetic differentiation level was higher among samples from the second capture compared to the first. It is probable that in subdivided populations, when restricted gene flow is sustained over time, the genetic drift leads to accentuate the differentiation among subpopulations. The spatial autocorrelation analysis indicated that the dispersion range could occur around 500–550 m. Therefore, the probability of reinfestation by active dispersal of the insect could be reduced by implementing control and surveillance within an approximate radius of 500–550 m around the infested area.

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来源期刊
CiteScore
5.60
自引率
0.00%
发文量
13
审稿时长
>12 weeks
期刊介绍: The Journal of Zoological Systematics and Evolutionary Research (JZSER)is a peer-reviewed, international forum for publication of high-quality research on systematic zoology and evolutionary biology. The aim of the journal is to provoke a synthesis of results from morphology, physiology, animal geography, ecology, ethology, evolutionary genetics, population genetics, developmental biology and molecular biology. Besides empirical papers, theoretical contributions and review articles are welcome. Integrative and interdisciplinary contributions are particularly preferred. Purely taxonomic and predominantly cytogenetic manuscripts will not be accepted except in rare cases, and then only at the Editor-in-Chief''s discretion. The same is true for phylogenetic studies based solely on mitochondrial marker sequences without any additional methodological approach. To encourage scientific exchange and discussions, authors are invited to send critical comments on previously published articles. Only papers in English language are accepted.
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