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The genetic diversity of SMLS (Sitobion miscanthi L type symbiont) and its effect on the fitness, mitochondrial DNA diversity and Buchnera aphidicola dynamic of wheat aphid, Sitobion miscanthi (Hemiptera: Aphididae)

文献类型： 外文期刊

作者： Li, Tong 1 ; Wu, Xu-Jin; Jiang, Yue-Li 1 ; Zhang, Li 1 ; Duan, Yun 1 ; Miao, Jin 1 ; Gong, Zhong-Jun 2 ; Wu, Yu-Qing;

作者机构： 1.Henan Acad Agr Sci, Key Lab Integrated Pest Management Crops Southern, Henan Key Lab Crop Pest Control, Inst Plant Protect, 116 Huayuan Rd, Zhengzhou 450002, Peoples R China

2.Henan Acad Agr Sci, Key Lab Integrated Pest Management Crops Southern, Henan Key Lab Crop Pest Control, Inst Plant Protect, 116 Huayuan Rd, Zhengzhou

关键词： aphid;Buchnera aphidicola;mitochondrial DNA;secondary symbiont

期刊名称：MOLECULAR ECOLOGY （ 影响因子：6.185； 五年影响因子：6.801 ）

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收录情况： SCI

摘要： SMLS (Sitobion miscanthi L type symbiont) is a recently discovered aphid secondary symbiont. Using evidence extracted from 16S rRNA sequences, previous studies indicate that SMLS is the most widely distributed and most recently transferred secondary symbiont in Chinese Sitobion miscanthi populations. Here, we further investigated genetic diversity among SMLS geographic strains with multiloci data. Furthermore, the influence of SMLS on S. miscanthi was uncovered with ecological and evolutionary evidence. The results indicated that there was limited influence of infection with SMLS on variation and evolutionary patterns of S. miscanthi mitochondrial DNA. By hemolymph injection, the SMLS-infected and SMLS-uninfected S. miscanthi clones with the identical genetic background were built in this study. Although similar Buchnera aphidicola dynamics were observed between SMLS-infected and SMLS-uninfected S. miscanthi population, B. aphidicola density of SMLS-infected S. miscanthi population was always significantly higher than SMLS-uninfected ones. The results of fitness measurements indicated that under laboratory rearing conditions, transfection of SMLS could confer modest advantages to some fitness components of S. miscanthi, that is, total number of offspring, longevity, age of first reproduction and weight of adult. However, as SMLS is not strictly associated with S. miscanthi, further investigations are needed to uncover the mechanisms responsible for this inconceivable association.

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