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Marta Cobo-Simón¹, Rowan Hart¹, Howard Ochman¹

¹Department of Molecular Biosciences, University of Texas at Austin , Austin, Texas, USA.

|July 24, 2023

概括

沙门氏体,包括 Salmonella enterica 亚种,表现出繁殖隔离,这表明每个亚种是一个独特的生物物种. 这挑战了传统的细菌物种划分方法,仅基于遗传特征.

科学领域:

微生物学微生物学
基因组学就是基因组学.
进化生物学进化生物学

背景情况:

沙门氏属*包括*S. bongori*和*S. enterica*,而*S. enterica*则进一步被划分为亚种.
由于无性繁殖,与真核生物不同,细菌物种概念受到争论.
以前的理解认为*沙门氏菌*血清病毒是严格克隆的.

研究的目的:

调查Salmonella*属内的基因流动和重组模式.
为了确定Salmonella亚种是否符合生物物种概念 (BSC) 的标准.
重新评估细菌的物种划分方法.

主要方法:

分析了超过1000个Salmonella基因组的重组模式.
对亚种进行比较基因组分析,重点是S. enterica和S. diarizonae.
基于基因组序列分歧的生殖隔离的评估.

主要成果:

*Salmonella*亚种,包括*S. enterica*和*S. diarizonae*,是相互和其他亚种的繁殖隔离.
萨尔莫内拉属*表现出足够的同源重组,可以被归类为BSC.
基因组序列分歧表明,大多数,如果不是全部,Salmonella亚种代表着不同的生物物种.

结论:

每种*Salmonella*亚种都应该被视为一个单独的生物物种.
核酸识别值对于细菌物种划分是不可靠的.
生物物种概念适用于细菌,即使是那些具有复杂分歧模式的细菌.

关键词:

沙门氏菌是一种沙门氏菌.肠道细菌是一种肠道细菌.基因组学就是基因组学.再组合的复合方式.种类的变化种类的变化

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