Construction and evaluation of a new rat reference genome assembly, GRCr8, from long reads and long-range scaffolding

Table 2.

Telomeric sequences in the GRCr8 assembly compared with mRatBN7.2

Proximal telomere size (kbp) Distal telomere size (kbp)
Telo/Acro/Metacentric mRatBN7.2 GRCr8 mRatBN7.2 GRCr8
Chr 1 Metacentric 0 9.2 2.8 13
Chr 2 Telocentric 0 12 4.2 4.9
Chr 3 Acrocentric 0 0 5.3 21.9
Chr 4 Telocentric 0 7.2 4.6 12
Chr 5 Telocentric 0 16.3 3.9 11.5
Chr 6 Telocentric 0 0 3.7 23.3
Chr 7 Telocentric 0 0 1.9 9.9
Chr 8 Telocentric 0 0 3.5 8.3
Chr 9 Telocentric 0 0 1.6 13.7
Chr 10 Telocentric 0 0 2.2 6.7
Chr 11 Acrocentric 0 0 2.8 10.6
Chr 12 Acrocentric 0 0 0 13.9
Chr 13 Metacentric 1.7 10 3.2 17.4
Chr 14 Metacentric 3.2 18.2 5.9 8.8
Chr 15 Metacentric 2.5 0 2.4 18.8
Chr 16 Metacentric 3 9.9 2.1 14.4
Chr 17 Metacentric 2.3 8.1 12.4 10.4
Chr 18 Metacentric 1.6 15.9 6.5 22.4
Chr 19 Metacentric 2.4 8.8 2.9 14.5
Chr 20 Metacentric 2 7.3 1.4 5.1
Chr X Telocentric 0 0 0 0
Chr Y Telocentric 0 0 0 0
  • Telocentric indicates that the centromere is at the proximal region of the chromosome. Acro/rDNA indicates an acrosomal centromere with rDNA's in the acrocentric arm. Metacentric indicates a meta- or submetacentric centromere. Telomere size (kbp) is estimated as the number of telomeric bases composed of hexamer repeat sequences.

This Article

  1. Genome Res. 34: 2081-2093

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