Creates a sequence dictionary for a reference sequence. This tool creates a sequence dictionary file (with ".dict" extension) from a reference sequence provided in FASTA format, which is required by many processing and analysis tools. The output file contains a header but no SAMRecords, and the header contains only sequence records.

The reference sequence can be gzipped (both .fasta and .fasta.gz are supported).

Usage example:

java -jar picard.jar CreateSequenceDictionary \ 
      R=reference.fasta \ 
      O=reference.dict

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Category Reference

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Overview

Create a SAM/BAM file from a fasta containing reference sequence. The output SAM file contains a header but no SAMRecords, and the header contains only sequence records.

CreateSequenceDictionary (Picard) specific arguments

This table summarizes the command-line arguments that are specific to this tool. For more details on each argument, see the list further down below the table or click on an argument name to jump directly to that entry in the list.

Argument name(s)	Default value	Summary
Required Arguments
--REFERENCE  -R	null	Input reference fasta or fasta.gz
Optional Tool Arguments
--ALT_NAMES  -AN	null	Optional file containing the alternative names for the contigs. Tools may use this information to consider different contig notations as identical (e.g: 'chr1' and '1'). The alternative names will be put into the appropriate @AN annotation for each contig. No header. First column is the original name, the second column is an alternative name. One contig may have more than one alternative name.
--arguments_file	[]	read one or more arguments files and add them to the command line
--GENOME_ASSEMBLY  -AS	null	Put into AS field of sequence dictionary entry if supplied
--help  -h	false	display the help message
--NUM_SEQUENCES	2147483647	Stop after writing this many sequences. For testing.
--OUTPUT  -O	null	Output SAM file containing only the sequence dictionary. By default it will use the base name of the input reference with the .dict extension
--SPECIES  -SP	null	Put into SP field of sequence dictionary entry
--TRUNCATE_NAMES_AT_WHITESPACE	true	Make sequence name the first word from the > line in the fasta file. By default the entire contents of the > line is used, excluding leading and trailing whitespace.
--URI  -UR	null	Put into UR field of sequence dictionary entry. If not supplied, input reference file is used
--version	false	display the version number for this tool
Optional Common Arguments
--COMPRESSION_LEVEL	5	Compression level for all compressed files created (e.g. BAM and VCF).
--CREATE_INDEX	false	Whether to create a BAM index when writing a coordinate-sorted BAM file.
--CREATE_MD5_FILE	false	Whether to create an MD5 digest for any BAM or FASTQ files created.
--GA4GH_CLIENT_SECRETS	client_secrets.json	Google Genomics API client_secrets.json file path.
--MAX_RECORDS_IN_RAM	500000	When writing files that need to be sorted, this will specify the number of records stored in RAM before spilling to disk. Increasing this number reduces the number of file handles needed to sort the file, and increases the amount of RAM needed.
--QUIET	false	Whether to suppress job-summary info on System.err.
--TMP_DIR	[]	One or more directories with space available to be used by this program for temporary storage of working files
--USE_JDK_DEFLATER  -use_jdk_deflater	false	Use the JDK Deflater instead of the Intel Deflater for writing compressed output
--USE_JDK_INFLATER  -use_jdk_inflater	false	Use the JDK Inflater instead of the Intel Inflater for reading compressed input
--VALIDATION_STRINGENCY	STRICT	Validation stringency for all SAM files read by this program. Setting stringency to SILENT can improve performance when processing a BAM file in which variable-length data (read, qualities, tags) do not otherwise need to be decoded.
--VERBOSITY	INFO	Control verbosity of logging.
Advanced Arguments
--showHidden	false	display hidden arguments

Argument details

Arguments in this list are specific to this tool. Keep in mind that other arguments are available that are shared with other tools (e.g. command-line GATK arguments); see Inherited arguments above.

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--ALT_NAMES / -AN

Optional file containing the alternative names for the contigs. Tools may use this information to consider different contig notations as identical (e.g: 'chr1' and '1'). The alternative names will be put into the appropriate @AN annotation for each contig. No header. First column is the original name, the second column is an alternative name. One contig may have more than one alternative name.

File  null

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--arguments_file / NA

read one or more arguments files and add them to the command line

List[File]  []

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--COMPRESSION_LEVEL / NA

Compression level for all compressed files created (e.g. BAM and VCF).

int  5  [ [ -∞  ∞ ] ]

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--CREATE_INDEX / NA

Whether to create a BAM index when writing a coordinate-sorted BAM file.

Boolean  false

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--CREATE_MD5_FILE / NA

Whether to create an MD5 digest for any BAM or FASTQ files created.

boolean  false

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--GA4GH_CLIENT_SECRETS / NA

Google Genomics API client_secrets.json file path.

String  client_secrets.json

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--GENOME_ASSEMBLY / -AS

Put into AS field of sequence dictionary entry if supplied

String  null

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--help / -h

display the help message

boolean  false

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--MAX_RECORDS_IN_RAM / NA

When writing files that need to be sorted, this will specify the number of records stored in RAM before spilling to disk. Increasing this number reduces the number of file handles needed to sort the file, and increases the amount of RAM needed.

Integer  500000  [ [ -∞  ∞ ] ]

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--NUM_SEQUENCES / NA

Stop after writing this many sequences. For testing.

int  2147483647  [ [ -∞  ∞ ] ]

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--OUTPUT / -O

Output SAM file containing only the sequence dictionary. By default it will use the base name of the input reference with the .dict extension

File  null

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--QUIET / NA

Whether to suppress job-summary info on System.err.

Boolean  false

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--REFERENCE / -R

Input reference fasta or fasta.gz

R File  null

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--showHidden / -showHidden

display hidden arguments

boolean  false

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--SPECIES / -SP

Put into SP field of sequence dictionary entry

String  null

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--TMP_DIR / NA

One or more directories with space available to be used by this program for temporary storage of working files

List[File]  []

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--TRUNCATE_NAMES_AT_WHITESPACE / NA

Make sequence name the first word from the > line in the fasta file. By default the entire contents of the > line is used, excluding leading and trailing whitespace.

boolean  true

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--URI / -UR

Put into UR field of sequence dictionary entry. If not supplied, input reference file is used

String  null

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--USE_JDK_DEFLATER / -use_jdk_deflater

Use the JDK Deflater instead of the Intel Deflater for writing compressed output

Boolean  false

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--USE_JDK_INFLATER / -use_jdk_inflater

Use the JDK Inflater instead of the Intel Inflater for reading compressed input

Boolean  false

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--VALIDATION_STRINGENCY / NA

Validation stringency for all SAM files read by this program. Setting stringency to SILENT can improve performance when processing a BAM file in which variable-length data (read, qualities, tags) do not otherwise need to be decoded.

The --VALIDATION_STRINGENCY argument is an enumerated type (ValidationStringency), which can have one of the following values:

STRICT

LENIENT

SILENT

ValidationStringency  STRICT

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--VERBOSITY / NA

Control verbosity of logging.

The --VERBOSITY argument is an enumerated type (LogLevel), which can have one of the following values:

ERROR

WARNING

INFO

DEBUG

LogLevel  INFO

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--version / NA

display the version number for this tool

boolean  false

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GATK version 4.0.12.0 built at 23-45-2019 03:45:45.