Horse vs Pig LastZ results

Horse (Equus caballus, EquCab3.0) and Pig (Sus scrofa, Sscrofa11.1) were aligned using the LastZ alignment algorithm (LastZ) in Ensembl release 95. Horse 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
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

ParameterHorsePig
Chunk size10,100,00010,100,000
Overlap100,000100,000
Group set size10,100,00010,100,000
Masking options{default_soft_masking => 1}{default_soft_masking => 1}

Statistics over 2,043,496 alignment blocks

Genome coverage (bp) Coding exon coverage (bp)
Horse

Uncovered: 791,533,569 out of 2,506,966,135
Covered: 1,715,432,566 out of 2,506,966,135

Uncovered: 1,597,010 out of 38,317,516
Matches: 32,267,246 out of 38,317,516
Mismatches: 4,094,469 out of 38,317,516
Insertions: 358,791 out of 38,317,516
Identity over aligned base-pairs: 87.9%

Pig

Uncovered: 900,501,339 out of 2,501,912,388
Covered: 1,601,411,049 out of 2,501,912,388

Uncovered: 2,546,952 out of 35,448,596
Matches: 29,313,430 out of 35,448,596
Mismatches: 3,435,283 out of 35,448,596
Insertions: 152,931 out of 35,448,596
Identity over aligned base-pairs: 89.1%

Block size distribution

Size range All 2,043,496 alignment blocks Blocks grouped in nets
# blocks Total size (incl. gaps) # nets Total size (incl. gaps)
1 bp - 10 bp
105,504
678.4 kb
10 bp - 100 bp
200,513
9.2 Mb
12,515
853.0 kb
100 bp - 1 kb
1,139,183
527.9 Mb
37,353
13.1 Mb
1 kb - 10 kb
596,694
1.2 Gb
12,058
33.8 Mb
10 kb - 100 kb
1,601
21.5 Mb
1,839
52.0 Mb
100 kb - 1 Mb
1
134.0 kb
225
52.4 Mb
1 Mb - 10 Mb
51
171.7 Mb
10 Mb - 100 Mb
56
1.5 Gb