Monotonicity of fitness landscapes and mutation rate control.
Monotonicity of fitness landscapes and mutation rate control.
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DOI:
10.1007/s00285-016-0995-3
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发表时间:
2016-12
影响因子:
1.9
通讯作者:
Knight, Christopher G.
中科院分区:
文献类型:
--
作者:
Belavkin, Roman V.;Channon, Alastair;Aston, Elizabeth;Aston, John;Krasovec, Rok;Knight, Christopher G.
A common view in evolutionary biology is that mutation rates are minimised. However, studies in combinatorial optimisation and search have shown a clear advantage of using variable mutation rates as a control parameter to optimise the performance of evolutionary algorithms. Much biological theory in this area is based on Ronald Fisher’s work, who used Euclidean geometry to study the relation between mutation size and expected fitness of the offspring in infinite phenotypic spaces. Here we reconsider this theory based on the alternative geometry of discrete and finite spaces of DNA sequences. First, we consider the geometric case of fitness being isomorphic to distance from an optimum, and show how problems of optimal mutation rate control can be solved exactly or approximately depending on additional constraints of the problem. Then we consider the general case of fitness communicating only partial information about the distance. We define weak monotonicity of fitness landscapes and prove that this property holds in all landscapes that are continuous and open at the optimum. This theoretical result motivates our hypothesis that optimal mutation rate functions in such landscapes will increase when fitness decreases in some neighbourhood of an optimum, resembling the control functions derived in the geometric case. We test this hypothesis experimentally by analysing approximately optimal mutation rate control functions in 115 complete landscapes of binding scores between DNA sequences and transcription factors. Our findings support the hypothesis and find that the increase of mutation rate is more rapid in landscapes that are less monotonic (more rugged). We discuss the relevance of these findings to living organisms. The online version of this article (doi:10.1007/s00285-016-0995-3) contains supplementary material, which is available to authorized users.
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DOI:
10.1126/science.1162327
发表时间:
2009-06-26
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Badis G;Berger MF;Philippakis AA;Talukder S;Gehrke AR;Jaeger SA;Chan ET;Metzler G;Vedenko A;Chen X;Kuznetsov H;Wang CF;Coburn D;Newburger DE;Morris Q;Hughes TR;Bulyk ML
通讯作者:
Bulyk ML
影响因子:
3.3
作者:
Agrawal, AF;Hadany, L;Otto, SP
通讯作者:
Otto, SP
影响因子:
0.8
作者:
AHLSWEDE, R;KATONA, GOH
通讯作者:
KATONA, GOH
影响因子:
9.8
作者:
Agrawal, Aneil F.;Wang, Alethea D.
通讯作者:
Wang, Alethea D.
影响因子:
9.8
作者:
Chevin LM;Lande R;Mace GM
通讯作者:
Mace GM