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Characterization of a New Set of Microsatellite Markers Suggests Polygyny and Polyandry in Atta cephalotes (Hymenoptera: Formicidae)
Journal of Economic Entomology ( IF 2.2 ) Pub Date : 2020-09-23 , DOI: 10.1093/jee/toaa200
Vanessa Muñoz-Valencia 1 , Kirsi Kähkönen 2 , James Montoya-Lerma 1 , Fernando Díaz 3
Affiliation  

The leaf-cutting ant, Atta cephalotes L. (1758), is a major herbivore with great economic impact in the Neotropics. Because of its broad range and human-mediated dissemination, the ecology of this ant has received considerable attention; however, questions concerning its population genetics, dispersal, and social structure remain unexplored. Here, we aimed to identify and provide information on molecular and statistical performance of a suite of polymorphic microsatellite markers for A. cephalotes while demonstrating their utility for further genetic studies. We designed primer sequences targeting thousands of microsatellite loci and then screened 30 of these for amplification and polymorphism. Fifteen of these loci were selected and used to evaluate their polymorphism using 74 ants sampled from 15 different nests of the same location. This set of 15 loci exhibited variation of 2-20 alleles, with a mean heterozygosity of 0.57. All loci followed Hardy-Weinberg expectations with no evidence of linkage disequilibrium, while two loci showed evidence of null alleles. Our preliminary analysis suggested substantial nest differentiation with no population viscosity within the sampled location, as well as colonies with multiple queens (polygyny) and paternity (polyandry). Our newly identified microsatellites have proven to be highly informative to investigate gene flow, social structure and reproduction of this key agricultural pest.

中文翻译:

一组新的微卫星标记的表征表明 Atta cephalotes(膜翅目:蚁科)中的一夫多妻制和一妻多夫制

切叶蚁 Atta cephalotes L. (1758) 是一种主要的食草动物,在新热带地区具有巨大的经济影响。由于其广泛的范围和以人为媒介的传播,这种蚂蚁的生态受到了相当多的关注;然而,关于其种群遗传、分散和社会结构的问题仍未得到探索。在这里,我们旨在鉴定并提供有关头孢霉的一套多态性微卫星标记的分子和统计性能的信息,同时证明它们对进一步遗传研究的效用。我们设计了针对数千个微卫星位点的引物序列,然后筛选了其中的 30 个进行扩增和多态性。选择了其中的 15 个基因座,并使用从同一位置的 15 个不同巢穴中取样的 74 只蚂蚁来评估它们的多态性。这组 15 个基因座表现出 2-20 个等位基因的变异,平均杂合度为 0.57。所有基因座都遵循 Hardy-Weinberg 预期,没有连锁不平衡的证据,而两个基因座显示无效等位基因的证据。我们的初步分析表明,在采样位置内没有种群粘性的大量巢穴分化,以及具有多个皇后(一夫多妻)和父子关系(一妻多夫)的殖民地。我们新发现的微卫星已被证明可以为研究这种主要农业害虫的基因流、社会结构和繁殖提供高度信息。我们的初步分析表明,在采样位置内没有种群粘性的大量巢穴分化,以及具有多个皇后(一夫多妻)和父子关系(一妻多夫)的殖民地。我们新发现的微卫星已被证明可以为研究这种主要农业害虫的基因流、社会结构和繁殖提供高度信息。我们的初步分析表明,在采样位置内没有种群粘性的大量巢穴分化,以及具有多个皇后(一夫多妻)和父子关系(一妻多夫)的殖民地。我们新发现的微卫星已被证明可以为研究这种主要农业害虫的基因流、社会结构和繁殖提供高度信息。
更新日期:2020-09-23
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