PDF(Pubmed)
Abstract：
Most phloem-feeding insects face nutritional deficiency and rely on their intracellular symbionts to provide nutrients, and most of endosymbiont genomes have undergone reduction. However, the study of genome reduction processes of endosymbionts has been constrained by the limited availability of genome data from different insect lineages. The obligate relationship between aphids and Buchnera aphidicola (hereafter Buchnera) makes them a classic model for studying insect-endosymbiont interaction. Here, we report 29 newly sequenced Buchnera genomes from 11 aphid subfamilies, and a comprehensive dataset based on 90 Buchnera genomes from 14 aphid subfamilies. The dataset shows a significant genomic difference of Buchnera among different aphid lineages. The dataset exhibits a more balanced distribution of Buchnera (from 14 aphid subfamilies) genome sizes, ranging from 400 kb to 600 kb, which can illustrate the genome reduction process of Buchnera. The new genome data provide valuable insights into the microevolutionary processes leading to genomic reduction of insect endosymbionts.
摘要：
大多数以韧皮部为食的昆虫面临营养不足，并依靠其细胞内共生体提供营养，大多数内共生体基因组都经历了减少。然而,内共生体基因组减少过程的研究受到来自不同昆虫谱系的基因组数据有限的限制。蚜虫与Buchnera蚜虫（以下简称Buchnera）之间的专性关系使其成为研究昆虫-内共生体相互作用的经典模型。这里,我们报告了来自11个蚜虫亚家族的29个新测序的Buchnera基因组，和一个基于来自14个蚜虫亚科的90个Buchnera基因组的综合数据集。数据集显示不同蚜虫谱系之间Buchnera的显着基因组差异。该数据集显示出Buchnera（来自14个蚜虫亚家族）基因组大小的更平衡分布，从400kb到600kb，这可以说明Buchnera的基因组减少过程。新的基因组数据为导致昆虫内共生体基因组减少的微观进化过程提供了有价值的见解。
