Competition experiments in a soil microcosm reveal the impact of genetic and biotic factors on natural yeast populations.,The ISME Journal

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Competition experiments in a soil microcosm reveal the impact of genetic and biotic factors on natural yeast populations.
The ISME Journal ( IF 10.8 ) Pub Date : 2020-02-20 , DOI: 10.1038/s41396-020-0612-8
Clara Bleuven _{1,

2,

3,

4} , Guillaume Q Nguyen _{1,

2,

5} , Philippe C Després _{2,

3,

4,

6} , Marie Filteau _{2,

5} , Christian R Landry _{1,

2,

3,

4,

6}

Affiliation

The ability to measure microbial fitness directly in natural conditions and in interaction with other microbes is a challenge that needs to be overcome if we want to gain a better understanding of microbial fitness determinants in nature. Here we investigate the influence of the natural microbial community on the relative fitness of the North American populations SpB, SpC and SpC* of the wild yeast Saccharomyces paradoxus using DNA barcodes and a soil microcosm derived from soil associated with oak trees. We find that variation in fitness among these genetically distinct groups is influenced by the microbial community. Altering the microbial community load and diversity with an irradiation treatment significantly diminishes the magnitude of fitness differences among populations. Our findings suggest that microbial interactions could affect the evolution of yeast lineages in nature by modulating variation in fitness.

中文翻译：

在土壤微观世界中进行的竞争实验揭示了遗传和生物因素对天然酵母种群的影响。

如果我们想更好地了解自然界中的微生物适应性决定因素，直接在自然条件下以及与其他微生物相互作用下测量微生物适应度的能力是一个挑战。在这里，我们使用DNA条形码和源自与橡树相关的土壤的微观世界，研究了自然微生物群落对野生酵母Saccharomyces paradoxus北美种群SpB，SpC和SpC *的相对适应性的影响。我们发现，这些遗传上不同的群体之间的适应度差异受微生物群落的影响。通过辐照治疗来改变微生物群落的负荷和多样性，可以显着减小人群之间适应性差异的程度。

更新日期：2020-02-20

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