Whose trait is it anyways? Coevolution of joint phenotypes and genetic architecture in mutualisms
Whose trait is it anyways? Coevolution of joint phenotypes and genetic architecture in mutualisms
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到底是谁的特质呢?
DOI:
10.1098/rspb.2020.2483
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Frederickson, Megan E.
中科院分区:
文献类型:
--
作者:
O’Brien, Anna M.;Jack, Chandra N.;Friesen, Maren L.;Frederickson, Megan E.
Evolutionary biologists typically envision a trait’s genetic basis and fitness effects occurring within a single species. However, traits can be determined by and have fitness consequences for interacting species, thus evolving in multiple genomes. This is especially likely in mutualisms, where species exchange fitness benefits and can associate over long periods of time. Partners may experience evolutionary conflict over the value of a multi-genomic trait, but such conflicts may be ameliorated by mutualism’s positive fitness feedbacks. Here, we develop a simulation model of a host–microbe mutualism to explore the evolution of a multi-genomic trait. Coevolutionary outcomes depend on whether hosts and microbes have similar or different optimal trait values, strengths of selection and fitness feedbacks. We show that genome-wide association studies can map joint traits to loci in multiple genomes and describe how fitness conflict and fitness feedback generate different multi-genomic architectures with distinct signals around segregating loci. Partner fitnesses can be positively correlated even when partners are in conflict over the value of a multi-genomic trait, and conflict can generate strong mutualistic dependency. While fitness alignment facilitates rapid adaptation to a new optimum, conflict maintains genetic variation and evolvability, with implications for applied microbiome science.
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