The dynamics of molecular evolution over 60,000 generations.
The dynamics of molecular evolution over 60,000 generations.
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DOI:
10.1038/nature24287
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发表时间:
2017-11-02
期刊:
影响因子:
64.8
通讯作者:
Desai MM
中科院分区:
文献类型:
--
作者:
Good BH;McDonald MJ;Barrick JE;Lenski RE;Desai MM
The outcomes of evolution are determined by a stochastic dynamical process that governs how mutations arise and spread through a population. Here, we analyze the dynamics of molecular evolution in twelve experimental populations of Escherichia coli, using whole-genome metagenomic sequencing at 500-generation intervals through 60,000 generations. Despite a declining rate of fitness gain, molecular evolution continues to be characterized by signatures of rapid adaptation, with multiple beneficial variants simultaneously competing for dominance in each population. Interactions between ecological and evolutionary processes play an important role, as long-term quasi-stable coexistence arises spontaneously in most populations, and evolution continues within each clade. We also present new evidence that the targets of natural selection change over time, as epistasis and historical contingency alter the strength of selection on different genes. Together, these results show that long-term adaptation to a constant environment can be a more complex and dynamic process than is often assumed.
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影响因子:
4.5
作者:
Kvitek DJ;Sherlock G
通讯作者:
Sherlock G
影响因子:
30.8
作者:
通讯作者:
--
影响因子:
2.9
作者:
LENSKI, RE;ROSE, MR;TADLER, SC
通讯作者:
TADLER, SC
影响因子:
64.5
作者:
Nik-Zainal S;Van Loo P;Wedge DC;Alexandrov LB;Greenman CD;Lau KW;Raine K;Jones D;Marshall J;Ramakrishna M;Shlien A;Cooke SL;Hinton J;Menzies A;Stebbings LA;Leroy C;Jia M;Rance R;Mudie LJ;Gamble SJ;Stephens PJ;McLaren S;Tarpey PS;Papaemmanuil E;Davies HR;Varela I;McBride DJ;Bignell GR;Leung K;Butler AP;Teague JW;Martin S;Jönsson G;Mariani O;Boyault S;Miron P;Fatima A;Langerød A;Aparicio SA;Tutt A;Sieuwerts AM;Borg Å;Thomas G;Salomon AV;Richardson AL;Børresen-Dale AL;Futreal PA;Stratton MR;Campbell PJ;Breast Cancer Working Group of the International Cancer Genome Consortium
通讯作者:
Breast Cancer Working Group of the International Cancer Genome Consortium
DOI:
10.1098/rspb.2015.2292
发表时间:
2015-12-22
期刊:
Proceedings. Biological sciences
影响因子:
--
作者:
Lenski RE;Wiser MJ;Ribeck N;Blount ZD;Nahum JR;Morris JJ;Zaman L;Turner CB;Wade BD;Maddamsetti R;Burmeister AR;Baird EJ;Bundy J;Grant NA;Card KJ;Rowles M;Weatherspoon K;Papoulis SE;Sullivan R;Clark C;Mulka JS;Hajela N
通讯作者:
Hajela N