Nascent life cycles and the emergence of higher-level individuality
Nascent life cycles and the emergence of higher-level individuality
复制标题
新生的生命周期和更高层次个性的出现
DOI:
10.1098/rstb.2016.0420
复制
发表时间:
2017
期刊:
影响因子:
--
通讯作者:
Libby, Eric
中科院分区:
文献类型:
--
作者:
Ratcliff, William C.;Herron, Matthew;Conlin, Peter L.;Libby, Eric
Evolutionary transitions in individuality (ETIs) occur when formerly autonomous organisms evolve to become parts of a new, ‘higher-level’ organism. One of the first major hurdles that must be overcome during an ETI is the emergence of Darwinian evolvability in the higher-level entity (e.g. a multicellular group), and the loss of Darwinian autonomy in the lower-level units (e.g. individual cells). Here, we examine how simple higher-level life cycles are a key innovation during an ETI, allowing this transfer of fitness to occur ‘for free’. Specifically, we show how novel life cycles can arise and lead to the origin of higher-level individuals by (i) mitigating conflicts between levels of selection, (ii) engendering the expression of heritable higher-level traits and (iii) allowing selection to efficiently act on these emergent higher-level traits. Further, we compute how canonical early life cycles vary in their ability to fix beneficial mutations via mathematical modelling. Life cycles that lack a persistent lower-level stage and develop clonally are far more likely to fix ‘ratcheting’ mutations that limit evolutionary reversion to the pre-ETI state. By stabilizing the fragile first steps of an evolutionary transition in individuality, nascent higher-level life cycles may play a crucial role in the origin of complex life.This article is part of the themed issue ‘Process and pattern in innovations from cells to societies’.
登录
查看更多内容
影响因子:
5.4
作者:
Herron, Matthew D.;Zamani-Dahaj, Seyed A.;Ratcliff, William C.
通讯作者:
Ratcliff, William C.
DOI:
10.1073/pnas.0801667105
发表时间:
2008-10-28
影响因子:
11.1
作者:
Carr, M.;Leadbeater, B. S. C.;Baldauf, S. L.
通讯作者:
Baldauf, S. L.
影响因子:
19
作者:
Abedin, Monika;King, Nicole
通讯作者:
King, Nicole
DOI:
10.4159/9780674029118
发表时间:
2006-01
期刊:
--
影响因子:
--
作者:
A. Burt;R. Trivers
通讯作者:
A. Burt;R. Trivers
DOI:
10.7551/mitpress/9780262015240.003.0011
发表时间:
2011
期刊:
Biological Theory
影响因子:
--
作者:
Carl Simpson
通讯作者:
Carl Simpson