Provided by: iqtree_1.6.1+dfsg-1_amd64 
NAME
iqtree-omp - efficient phylogenetic software by maximum likelihood (multiprocessor version)
SYNOPSIS
iqtree-omp -s <alignment> [OPTIONS]
DESCRIPTION
IQ-TREE multicore version 1.6.1 for Linux 64-bit built Feb 16 2018 Developed by Bui Quang Minh, Nguyen
Lam Tung, Olga Chernomor, Heiko Schmidt, Dominik Schrempf, Michael Woodhams.
GENERAL OPTIONS:
-? or -h
Print this help dialog
-s <alignment>
Input alignment in PHYLIP/FASTA/NEXUS/CLUSTAL/MSF format
-st <data_type>
BIN, DNA, AA, NT2AA, CODON, MORPH (default: auto-detect)
-q <partition_file>
Edge-linked partition model (file in NEXUS/RAxML format)
-spp <partition_file> Like -q option but allowing partition-specific rates
-sp <partition_file> Edge-unlinked partition model (like -M option of RAxML)
-t <start_tree_file> or -t BIONJ or -t RANDOM
Starting tree (default: 99 parsimony tree and BIONJ)
-te <user_tree_file> Like -t but fixing user tree (no tree search performed)
-o <outgroup_taxon>
Outgroup taxon name for writing .treefile
-pre <PREFIX>
Prefix for all output files (default: aln/partition)
-nt <#cpu_cores>
Number of cores/threads to use (REQUIRED)
-seed <number>
Random seed number, normally used for debugging purpose
-v, -vv, -vvv
Verbose mode, printing more messages to screen
-quiet Quiet mode, suppress printing to screen (stdout)
-keep-ident
Keep identical sequences (default: remove & finally add)
-safe Safe likelihood kernel to avoid numerical underflow
-mem RAM
Maximal RAM usage for memory saving mode
CHECKPOINTING TO RESUME STOPPED RUN:
-redo Redo analysis even for successful runs (default: resume)
-cptime <seconds>
Minimum checkpoint time interval (default: 60 sec)
LIKELIHOOD MAPPING ANALYSIS:
-lmap <#quartets>
Number of quartets for likelihood mapping analysis
-lmclust <clustfile> NEXUS file containing clusters for likelihood mapping
-wql Print quartet log-likelihoods to .quartetlh file
NEW STOCHASTIC TREE SEARCH ALGORITHM:
-ninit <number>
Number of initial parsimony trees (default: 100)
-ntop <number>
Number of top initial trees (default: 20)
-nbest <number>
Number of best trees retained during search (defaut: 5)
-n <#iterations>
Fix number of iterations to stop (default: auto)
-nstop <number>
Number of unsuccessful iterations to stop (default: 100)
-pers <proportion>
Perturbation strength for randomized NNI (default: 0.5)
-sprrad <number>
Radius for parsimony SPR search (default: 6)
-allnni
Perform more thorough NNI search (default: off)
-g <constraint_tree> (Multifurcating) topological constraint tree file
-fast Fast search to resemble FastTree
ULTRAFAST BOOTSTRAP:
-bb <#replicates>
Ultrafast bootstrap (>=1000)
-bsam GENE|GENESITE
Resample GENE or GENE+SITE for partition (default: SITE)
-wbt Write bootstrap trees to .ufboot file (default: none)
-wbtl Like -wbt but also writing branch lengths
-nm <#iterations>
Maximum number of iterations (default: 1000)
-nstep <#iterations> #Iterations for UFBoot stopping rule (default: 100)
-bcor <min_corr>
Minimum correlation coefficient (default: 0.99)
-beps <epsilon>
RELL epsilon to break tie (default: 0.5)
-bnni Optimize UFBoot trees by NNI on bootstrap alignment
STANDARD NON-PARAMETRIC BOOTSTRAP:
-b <#replicates>
Bootstrap + ML tree + consensus tree (>=100)
-bc <#replicates>
Bootstrap + consensus tree
-bo <#replicates>
Bootstrap only
SINGLE BRANCH TEST:
-alrt <#replicates>
SH-like approximate likelihood ratio test (SH-aLRT)
-alrt 0
Parametric aLRT test (Anisimova and Gascuel 2006)
-abayes
approximate Bayes test (Anisimova et al. 2011)
-lbp <#replicates>
Fast local bootstrap probabilities
MODEL-FINDER:
-m TESTONLY
Standard model selection (like jModelTest, ProtTest)
-m TEST
Standard model selection followed by tree inference
-m MF Extended model selection with FreeRate heterogeneity
-m MFP Extended model selection followed by tree inference
-m TESTMERGEONLY
Find best partition scheme (like PartitionFinder)
-m TESTMERGE
Find best partition scheme followed by tree inference
-m MF+MERGE
Find best partition scheme incl. FreeRate heterogeneity
-m MFP+MERGE
Like -m MF+MERGE followed by tree inference
-rcluster <percent>
Percentage of partition pairs (relaxed clustering alg.)
-rclusterf <perc.>
Percentage of partition pairs (fast relaxed clustering)
-rcluster-max <num>
Max number of partition pairs (default: 10*#partitions)
-mset program
Restrict search to models supported by other programs (raxml, phyml or mrbayes)
-mset <lm-subset>
Restrict search to a subset of the Lie-Markov models Options for lm-subset are: liemarkov,
liemarkovry, liemarkovws, liemarkovmk, strandsymmetric
-mset m1,...,mk
Restrict search to models in a comma-separated list (e.g. -mset WAG,LG,JTT)
-msub source
Restrict search to AA models for specific sources (nuclear, mitochondrial, chloroplast or viral)
-mfreq f1,...,fk
Restrict search to using a list of state frequencies (default AA: -mfreq FU,F; codon: -mfreq
,F1x4,F3x4,F)
-mrate r1,...,rk
Restrict search to a list of rate-across-sites models (e.g. -mrate E,I,G,I+G,R is used for -m MF)
-cmin <kmin>
Min #categories for FreeRate model [+R] (default: 2)
-cmax <kmax>
Max #categories for FreeRate model [+R] (default: 10)
-merit AIC|AICc|BIC
Optimality criterion to use (default: all)
-mtree Perform full tree search for each model considered
-mredo Ignore model results computed earlier (default: reuse)
-madd mx1,...,mxk
List of mixture models to also consider
-mdef <nexus_file>
A model definition NEXUS file (see Manual)
SUBSTITUTION MODEL:
-m <model_name>
DNA: HKY (default), JC, F81, K2P, K3P, K81uf, TN/TrN, TNef,
TIM, TIMef, TVM, TVMef, SYM, GTR, or 6-digit model specification (e.g., 010010 = HKY)
Protein: LG (default), Poisson, cpREV, mtREV, Dayhoff, mtMAM,
JTT, WAG, mtART, mtZOA, VT, rtREV, DCMut, PMB, HIVb, HIVw, JTTDCMut, FLU, Blosum62, GTR20, mtMet,
mtVer, mtInv
Protein mixture: C10,...,C60, EX2, EX3, EHO, UL2, UL3, EX_EHO, LG4M, LG4X
Binary: JC2 (default), GTR2
Empirical codon: KOSI07, SCHN05
Mechanistic codon: GY (default), MG, MGK, GY0K, GY1KTS, GY1KTV, GY2K,
MG1KTS, MG1KTV, MG2K
Semi-empirical codon: XX_YY where XX is empirical and YY is mechanistic model
Morphology/SNP: MK (default), ORDERED Lie Markov DNA: One of the following, optionally prefixed by
RY, WS or MK:
1.1, 2.2b, 3.3a, 3.3b, 3.3c,
3.4, 4.4a, 4.4b, 4.5a, 4.5b,
5.6a, 5.6b, 5.7a, 5.7b,
5.7c,
5.11a,5.11b,5.11c,5.16,
6.6,
6.7a, 6.7b, 6.8a, 6.8b,
6.17a,
6.17b,8.8,
8.10a,8.10b, 8.16,
8.17, 8.18, 9.20a,9.20b,10.12,
10.34,12.12
Non-reversible: STRSYM (strand symmetric model, synonymous with WS6.6) Non-reversible: UNREST
(most general unrestricted model, functionally equivalent to 12.12) Models can have parameters
appended in brackets.
e.g. '-mRY3.4{0.2,-0.3}+I' specifies parameters for RY3.4 model but leaves proportion of invariant
sites unspecified. '-mRY3.4{0.2,-0.3}+I{0.5} gives both. When this is done, the given parameters
will be taken as fixed (default) or as start point for optimization (if -optfromgiven option
supplied)
Otherwise: Name of file containing user-model parameters
(rate parameters and state frequencies)
STATE FREQUENCY:
Append one of the following +F... to -m <model_name> +F Empirically counted
frequencies from alignment +FO (letter-O) Optimized frequencies by maximum-likelihood +FQ
Equal frequencies +FRY, +FWS, +FMK For DNA models only, +FRY is freq(A+G)=1/2=freq(C+T),
+FWS is freq(A+T)=1/2=freq(C+G), +FMK is freq(A+C)=1/2=freq(G+T).
+F#### where # are digits - for DNA models only, for basis in ACGT order, digits indicate which
frequencies are constrained to be the same. E.g. +F1221 means freq(A)=freq(T), freq(C)=freq(G).
+FU Amino-acid frequencies by the given protein matrix
+F1x4 (codon model)
Equal NT frequencies over three codon positions
+F3x4 (codon model)
Unequal NT frequencies over three codon positions
MIXTURE MODEL:
-m "MIX{model1,...,modelK}"
Mixture model with K components
-m "FMIX{freq1,...freqK}"
Frequency mixture model with K components
-mwopt Turn on optimizing mixture weights (default: none)
RATE HETEROGENEITY AMONG SITES:
-m modelname+I
A proportion of invariable sites
-m modelname+G[n]
Discrete Gamma model with n categories (default n=4)
-m modelname*G[n]
Discrete Gamma model with unlinked model parameters
-m modelname+I+G[n]
Invariable sites plus Gamma model with n categories
-m modelname+R[n]
FreeRate model with n categories (default n=4)
-m modelname*R[n]
FreeRate model with unlinked model parameters
-m modelname+I+R[n]
Invariable sites plus FreeRate model with n categories
-m modelname+Hn
Heterotachy model with n classes
-m modelname*Hn
Heterotachy model with n classes and unlinked parameters
-a <Gamma_shape>
Gamma shape parameter for site rates (default: estimate)
-amin <min_shape>
Min Gamma shape parameter for site rates (default: 0.02)
-gmedian
Median approximation for +G site rates (default: mean)
--opt-gamma-inv
More thorough estimation for +I+G model parameters
-i <p_invar>
Proportion of invariable sites (default: estimate)
-wsr Write site rates to .rate file
-mh Computing site-specific rates to .mhrate file using Meyer & von Haeseler (2003) method
POLYMORPHISM AWARE MODELS (PoMo):
-s <counts_file>
Input counts file (see manual)
-m <MODEL>+P
DNA substitution model (see above) used with PoMo
+N<POPSIZE>
Virtual population size (default: 9)
+[WB|WH|S]
Sampling method (default: +WB), WB: Weighted binomial, WH: Weighted hypergeometric S: Sampled
sampling
+G[n] Discrete Gamma rate model with n categories (default n=4)
ASCERTAINMENT BIAS CORRECTION:
-m modelname+ASC
Correction for absence of invariant sites in alignment
SINGLE TOPOLOGY HETEROTACHY MODEL:
-m <model_name>+H[k]
Heterotachy model mixed branch lengths with k classes
-m "MIX{m1,...mK}+H"
-nni-eval <m>
Loop m times for NNI evaluation (default m=1)
SITE-SPECIFIC FREQUENCY MODEL:
-ft <tree_file>
Input tree to infer site frequency model
-fs <in_freq_file>
Input site frequency model file
-fmax Posterior maximum instead of mean approximation
CONSENSUS RECONSTRUCTION:
-t <tree_file>
Set of input trees for consensus reconstruction
-minsup <threshold>
Min split support in range [0,1]; 0.5 for majority-rule consensus (default: 0, i.e. extended
consensus)
-bi <burnin>
Discarding <burnin> trees at beginning of <treefile>
-con Computing consensus tree to .contree file
-net Computing consensus network to .nex file
-sup <target_tree>
Assigning support values for <target_tree> to .suptree
-suptag <name>
Node name (or ALL) to assign tree IDs where node occurs
ROBINSON-FOULDS DISTANCE:
-rf_all
Computing all-to-all RF distances of trees in <treefile>
-rf <treefile2>
Computing all RF distances between two sets of trees stored in <treefile> and <treefile2>
-rf_adj
Computing RF distances of adjacent trees in <treefile>
TREE TOPOLOGY TEST:
-z <trees_file>
Evaluating a set of user trees
-zb <#replicates>
Performing BP,KH,SH,ELW tests for trees passed via -z
-zw Also performing weighted-KH and weighted-SH tests
-au Also performing approximately unbiased (AU) test
ANCESTRAL STATE RECONSTRUCTION:
-asr Ancestral state reconstruction by empirical Bayes
-asr-min <prob>
Min probability of ancestral state (default: equil freq)
GENERATING RANDOM TREES:
-r <num_taxa>
Create a random tree under Yule-Harding model
-ru <num_taxa>
Create a random tree under Uniform model
-rcat <num_taxa>
Create a random caterpillar tree
-rbal <num_taxa>
Create a random balanced tree
-rcsg <num_taxa>
Create a random circular split network
-rlen <min_len> <mean_len> <max_len>
min, mean, and max branch lengths of random trees
MISCELLANEOUS:
-wt Write locally optimal trees into .treels file
-blfix Fix branch lengths of user tree passed via -te
-blscale
Scale branch lengths of user tree passed via -t
-blmin Min branch length for optimization (default 0.000001)
-blmax Max branch length for optimization (default 100)
-wsr Write site rates and categories to .rate file
-wsl Write site log-likelihoods to .sitelh file
-wslr Write site log-likelihoods per rate category
-wslm Write site log-likelihoods per mixture class
-wslmr Write site log-likelihoods per mixture+rate class
-wspr Write site probabilities per rate category
-wspm Write site probabilities per mixture class
-wspmr Write site probabilities per mixture+rate class
-wpl Write partition log-likelihoods to .partlh file
-fconst f1,...,fN
Add constant patterns into alignment (N=#nstates)
-me <epsilon>
LogL epsilon for parameter estimation (default 0.01)
--no-outfiles
Suppress printing output files
--eigenlib
Use Eigen3 library
-alninfo
Print alignment sites statistics to .alninfo
-czb Collapse zero branches in final tree
iqtree-omp 1.6.1+dfsg February 2018 IQTREE-OMP(1)