Statistically consistent and computationally efficient inference of ancestral DNA sequences in the TKF91 model under dense taxon sampling
Statistically consistent and computationally efficient inference of ancestral DNA sequences in the TKF91 model under dense taxon sampling
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在密集分类单元采样下,TKF91 模型中祖先 DNA 序列的统计一致性和计算效率推断
DOI:
10.1007/s11538-020-00693-3
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发表时间:
2020
影响因子:
3.5
通讯作者:
Roch, Sebastien
中科院分区:
文献类型:
--
作者:
Fan, Wai-Tong;Roch, Sebastien
In evolutionary biology, the speciation history of living organisms is represented graphically by a phylogeny, that is, a rooted tree whose leaves correspond to current species and whose branchings indicate past speciation events. Phylogenetic analyses often rely on molecular sequences, such as DNA sequences, collected from the species of interest, and it is common in this context to employ statistical approaches based on stochastic models of sequence evolution on a tree. For tractability, such models necessarily make simplifying assumptions about the evolutionary mechanisms involved. In particular, commonly omitted areinsertionsanddeletionsof nucleotides—also known as indels. Properly accounting for indels in statistical phylogenetic analyses remains a major challenge in computational evolutionary biology. Here, we consider the problem of reconstructing ancestral sequences on a known phylogeny in a model of sequence evolution incorporating nucleotide substitutions, insertions and deletions, specifically the classical TKF91 process. We focus on the case of dense phylogenies of bounded height, which we refer to as the taxon-rich setting, where statistical consistency is achievable. We give the first explicit reconstruction algorithm with provable guarantees under constant rates of mutation. Our algorithm succeeds when the phylogeny satisfies the “big bang” condition, a necessary and sufficient condition for statistical consistency in this setting.
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影响因子:
1.4
作者:
Fan, Wai-Tong;Roch, Sebastien
通讯作者:
Roch, Sebastien
影响因子:
1.8
作者:
Elchanan Mossel
通讯作者:
Elchanan Mossel
DOI:
10.1016/j.spa.2012.08.004
发表时间:
2009-12
期刊:
ArXiv
影响因子:
--
作者:
Alexandr Andoni;C. Daskalakis;Avinatan Hassidim;S. Roch
通讯作者:
Alexandr Andoni;C. Daskalakis;Avinatan Hassidim;S. Roch
影响因子:
3.9
作者:
THORNE, JL;KISHINO, H;FELSENSTEIN, J
通讯作者:
FELSENSTEIN, J
DOI:
10.1007/978-3-540-69903-3_1
发表时间:
2008-07
期刊:
--
影响因子:
--
作者:
M. Mitzenmacher
通讯作者:
M. Mitzenmacher