Stickleback vs Lamprey LastZ results

Stickleback (Gasterosteus aculeatus, BROADS1) and Lamprey (Petromyzon marinus, Pmarinus_7.0) were aligned using the LastZ alignment algorithm (LastZ) in Ensembl release 82. Stickleback was used as the reference species. After running LastZ, the raw LastZ alignment blocks were chained according to their location in both genomes. During the final netting process, the best sub-chain was chosen in each region on the reference species.

Configuration parameters

ParameterValue
Gap open penalty (O)400
Gap extend penalty (E)30
HSP threshold (K)3000
Threshold for gapped extension (L)3000
Threshold for alignments between gapped alignment blocks (H)2200
Masking count (M)
Seed and Transition value (T)1
Scoring matrix (Q)
Default:
     A    C    G    T
    91 -114  -31 -123
  -114  100 -125  -31
   -31 -125  100 -114
  -123  -31 -114   91

Chunking parameters

ParameterSticklebackLamprey
Chunk size10,000,00010,100,000
Overlap0100,000
Group set size010,100,000
Masking options

Statistics over 125,105 alignment blocks

Genome coverage (bp) Coding exon coverage (bp)
Stickleback

Uncovered: 441,345,745 out of 461,533,448
Covered: 20,187,703 out of 461,533,448

Uncovered: 18,601,139 out of 32,649,418
Matches: 9,538,297 out of 32,649,418
Mismatches: 4,311,725 out of 32,649,418
Insertions: 198,257 out of 32,649,418
Identity over aligned base-pairs: 67.9%

Lamprey

Uncovered: 871,155,327 out of 885,550,958
Covered: 14,395,631 out of 885,550,958

Uncovered: 4,440,847 out of 12,541,363
Matches: 5,528,409 out of 12,541,363
Mismatches: 2,415,781 out of 12,541,363
Insertions: 156,326 out of 12,541,363
Identity over aligned base-pairs: 68.2%

Block size distribution

Size range All 125,105 alignment blocks Blocks grouped in nets
# blocks Total size (incl. gaps) # nets Total size (incl. gaps)
1 bp - 10 bp
738
3.1 kb
10 bp - 100 bp
26,258
2.0 Mb
8,720
656.4 kb
100 bp - 1 kb
97,299
18.6 Mb
39,962
12.1 Mb
1 kb - 10 kb
766
1.4 Mb
4,719
8.9 Mb
10 kb - 100 kb
37
1.6 Mb
37
1.5 Mb
100 kb - 1 Mb
7
842.7 kb
8
1.2 Mb