Parsimonious inference of hybridization in the presence of incomplete lineage sorting.
Parsimonious inference of hybridization in the presence of incomplete lineage sorting.
复制标题
在不完整谱系分选的情况下杂交的简约推断。
DOI:
10.1093/sysbio/syt037
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发表时间:
2013
影响因子:
6.5
通讯作者:
Nakhleh,Luay
中科院分区:
文献类型:
--
作者:
Yu,Yun;Barnett,RMatthew;Nakhleh,Luay
Hybridization plays an important evolutionary role in several groups of organisms. A phylogenetic approach to detect hybridization entails sequencing multiple loci across the genomes of a group of species of interest, reconstructing their gene trees, and taking their differences as indicators of hybridization. However, methods that follow this approach mostly ignore population effects, such as incomplete lineage sorting (ILS). Given that hybridization occurs between closely related organisms, ILS may very well be at play and, hence, must be accounted for in the analysis framework. To address this issue, we present a parsimony criterion for reconciling gene trees within the branches of a phylogenetic network, and a local search heuristic for inferring phylogenetic networks from collections of gene-tree topologies under this criterion. This framework enables phylogenetic analyses while accounting for both hybridization and ILS. Further, we propose two techniques for incorporating information about uncertainty in gene-tree estimates. Our simulation studies demonstrate the good performance of our framework in terms of identifying the location of hybridization events, as well as estimating the proportions of genes that underwent hybridization. Also, our framework shows good performance in terms of efficiency on handling large data sets in our experiments. Further, in analysing a yeast data set, we demonstrate issues that arise when analysing real data sets. Although a probabilistic approach was recently introduced for this problem, and although parsimonious reconciliations have accuracy issues under certain settings, our parsimony framework provides a much more computationally efficient technique for this type of analysis. Our framework now allows for genome-wide scans for hybridization, while also accounting for ILS. [Phylogenetic networks; hybridization; incomplete lineage sorting; coalescent; multi-labeled trees.]
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影响因子:
1.7
作者:
Than, Cuong V.;Rosenberg, Noah A.
通讯作者:
Rosenberg, Noah A.
影响因子:
3.4
作者:
MacLeod D;Charlebois RL;Doolittle F;Bapteste E
通讯作者:
Bapteste E
DOI:
10.1093/bioinformatics/bts225
发表时间:
2012-06-15
期刊:
Bioinformatics (Oxford, England)
影响因子:
--
作者:
Bansal MS;Alm EJ;Kellis M
通讯作者:
Kellis M
影响因子:
6.5
作者:
Yu, Yun;Cuong Than;Nakhleh, Luay
通讯作者:
Nakhleh, Luay
影响因子:
7
作者:
Rasmussen, Matthew D.;Kellis, Manolis
通讯作者:
Kellis, Manolis