Chinese softshell turtle vs Abingdon island giant tortoise LastZ results

Chinese softshell turtle (Pelodiscus sinensis, PelSin_1.0) and Abingdon island giant tortoise (Chelonoidis abingdonii, ASM359739v1) were aligned using the LastZ alignment algorithm (LastZ) in Ensembl release 97. Chinese softshell turtle 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

ParameterChinese softshell turtleAbingdon island giant tortoise
Chunk size10,000,00010,100,000
Overlap0100,000
Group set size010,100,000
Masking options{default_soft_masking => 1}{default_soft_masking => 1}

Statistics over 1,924,558 alignment blocks

Genome coverage (bp) Coding exon coverage (bp)
Chinese softshell turtle

Uncovered: 1,036,767,306 out of 2,202,483,752
Covered: 1,165,716,446 out of 2,202,483,752

Uncovered: 2,091,596 out of 28,389,223
Matches: 23,738,626 out of 28,389,223
Mismatches: 2,447,998 out of 28,389,223
Insertions: 111,003 out of 28,389,223
Identity over aligned base-pairs: 90.3%

Abingdon island giant tortoise

Uncovered: 1,188,400,727 out of 2,300,739,315
Covered: 1,112,338,588 out of 2,300,739,315

Uncovered: 3,358,676 out of 29,396,458
Matches: 22,523,441 out of 29,396,458
Mismatches: 3,263,773 out of 29,396,458
Insertions: 250,568 out of 29,396,458
Identity over aligned base-pairs: 86.5%

Block size distribution

Size range All 1,924,558 alignment blocks Blocks grouped in nets
# blocks Total size (incl. gaps) # nets Total size (incl. gaps)
1 bp - 10 bp
41,018
265.6 kb
10 bp - 100 bp
235,129
13.6 Mb
48,809
3.4 Mb
100 bp - 1 kb
1,257,949
538.4 Mb
163,075
57.1 Mb
1 kb - 10 kb
390,199
682.3 Mb
28,672
63.1 Mb
10 kb - 100 kb
263
3.5 Mb
2,508
94.1 Mb
100 kb - 1 Mb
2,544
819.6 Mb
1 Mb - 10 Mb
145
200.8 Mb