Cow vs American bison LastZ results

Cow (Bos taurus, ARS-UCD1.3) and American bison (Bison bison bison, Bison_UMD1.0) were aligned using the LastZ alignment algorithm (LastZ) in Ensembl release 111. Cow 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

ParameterCowAmerican bison
Chunk size10,000,00010,100,000
Overlap0100,000
Group set size10,100,00010,100,000
Masking options

Statistics over 388,096 alignment blocks

Genome coverage (bp) Coding exon coverage (bp)
Cow

Uncovered: 114,612,113 out of 2,711,209,831
Covered: 2,596,597,718 out of 2,711,209,831

Uncovered: 357,807 out of 37,648,360
Matches: 34,786,000 out of 37,648,360
Mismatches: 2,466,180 out of 37,648,360
Insertions: 38,373 out of 37,648,360
Identity over aligned base-pairs: 93.3%

American bison

Uncovered: 406,383,603 out of 2,953,622,319
Covered: 2,547,238,716 out of 2,953,622,319

Uncovered: 512,377 out of 30,104,366
Matches: 29,058,855 out of 30,104,366
Mismatches: 518,767 out of 30,104,366
Insertions: 14,367 out of 30,104,366
Identity over aligned base-pairs: 98.2%

Block size distribution

Size range All 388,096 alignment blocks Blocks grouped in nets
# blocks Total size (incl. gaps) # nets Total size (incl. gaps)
1 bp - 10 bp
3,188
20.6 kb
10 bp - 100 bp
27,231
1.4 Mb
7,457
450.5 kb
100 bp - 1 kb
91,728
42.1 Mb
21,833
8.2 Mb
1 kb - 10 kb
182,629
732.8 Mb
11,403
41.4 Mb
10 kb - 100 kb
83,223
1.8 Gb
7,515
164.1 Mb
100 kb - 1 Mb
97
11.1 Mb
359
117.1 Mb
1 Mb - 10 Mb
351
1.4 Gb
10 Mb - 100 Mb
61
890.7 Mb