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海洋 Pseudoalteromonas atlantica 分离物种的生物地理模式

Prajakta P Kokate¹, Erika Bales², Dominique Joyner³

¹Department of Biological Sciences, Michigan Technological University, Houghton, MI 49931, United States.

FEMS microbiology letters

|August 12, 2023

概括

Pseudoalteromonas atlantica 种群中的基因组多样性是地理结构化的,这表明中性进化起着重要作用. 环境因素似乎没有驱动这些海洋微生物中观察到的表型变异.

科学领域:

微生物基因组学微生物基因组学
海洋微生物学海洋微生物学
进化生物学是进化的生物学.

背景情况:

在微生物中,特异性内基因组多样性是常见的,但驱动因素 (自然选择与中性进化) 仍然存在争议.
了解塑造微生物基因组多样性的因素对于进化和生态研究至关重要.

研究的目的:

为了研究 Pseudoalteromonas atlantica 种群的基因组多样性.
确定基因组多样性是否受到地理距离或当地环境因素的影响.
评估中性进化和自然选择对微生物生物多样性的相对贡献.

主要方法:

从三个深海盆地中分离和对23种Pseudoalteromonas atlantica菌株进行全基因组测序.
基因组比较分析,包括平均核酸标识 (ANI) 和泛基因组分析.
十种菌株的表型特征,以碳/利用率和氧气耐受性为准.

主要成果:

平均核酸标识显示出强烈的地理模式,在位置内具有较高的标识 (>99.5%) 和位置之间较低的标识 (<98.11%).
遗传学和泛基因组分析证实了菌株的明显生物地理分离.
观察到具有遗传基础的表型多样性,但与当地环境条件没有明确的联系.

结论:

Pseudoalteromonas atlantica 种群表现出由地理结构构成的显著的基因组和表型多样性.
中性进化似乎是塑造这些海洋细菌生物多样性的重要因素.
当地环境条件并没有对观察到的表型多样性产生很大的影响,这表明其他进化力量在发挥作用.

关键词:

生物地质学生物地质学分散限制限制的分散.远距离的影响基因组多样性基因组多样性内部特异性内部特异性中立进化是中立的进化.

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