Schema for Gap - Gap Locations
  Database: ailMel1    Primary Table: gap    Row Count: 119,126   Data last updated: 2010-02-03
Format description: Gaps in golden path
On download server: MariaDB table dump directory
fieldexampleSQL type info description
bin 585smallint(6) range Indexing field to speed chromosome range queries.
chrom GL192338.1varchar(255) values Reference sequence chromosome or scaffold
chromStart 375int(10) unsigned range start position in chromosome
chromEnd 433int(10) unsigned range end position in chromosome
ix 2int(11) range index count of this fragment (obsolete/useless)
n Nchar(1) values 'N' for gaps of known size, 'U' for gaps of unknown size
size 58int(10) unsigned range size of gap
type fragmentvarchar(255) values scaffold, contig, clone, fragment, etc.
bridge yesvarchar(255) values yes, no, mrna, bacEndPair, etc.

Sample Rows
 
binchromchromStartchromEndixnsizetypebridge
585GL192338.13754332N58fragmentyes
585GL192338.16046164N12fragmentyes
585GL192338.141980420216N41fragmentyes
585GL192338.150157510128N855fragmentyes
586GL192338.116484916504310N194fragmentyes
586GL192338.116907716915912N82fragmentyes
586GL192338.122942522948214N57fragmentyes
586GL192338.123118123297816N1797fragmentyes
586GL192338.125619525627818N83fragmentyes
587GL192338.129938529939820N13fragmentyes

Note: all start coordinates in our database are 0-based, not 1-based. See explanation here.

Gap (gap) Track Description
 

Description

This track depicts gaps in the assembly.

Gaps are represented as black boxes in this track. If the relative order and orientation of the contigs on either side of the gap is supported by read pair data, it is a bridged gap and a white line is drawn through the black box representing the gap.

This assembly contains the following types of gaps:

  • Fragment - gaps between the Whole Genome Shotgun contigs of a supercontig. (In this context, a contig is a set of overlapping sequence reads. A supercontig is a set of contigs ordered and oriented during the Whole Genome Shotgun process using paired-end reads.) These are represented by varying numbers of Ns in the assembly. Fragment gap sizes are usually taken from read pair data.

There are 119,126 fragment gaps in this draft assembly with a combined total of 54,196,184 bases of Ns. All these gaps are bridged gaps.