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

(Downloading may take up to 30 seconds. If the slide opens in your browser, select File -> Save As to save it.)

Click on image to view larger version.

Figure 2.
Figure 2.

We extracted all 21-mers from the HiFi reads to evaluate the k-mer distribution in the assembly. k-mers were aligned to the autosomes, extracted, and plotted to demonstrate multiplicity of k-mers. As anticipated, autosomally mapped k-mers show a single peak with a multiplicity similar to the sequencing read depth, indicative of the absence of heterozygosity. Similar mapping and plotting was done for the sex chromosomes, which both show a multiplicity indicative of their haploid state in the male subject genome. Supplemental Figure S2 shows each plot (autosomes, Chr Y, and Chr X) independently as well as the combined plot of all k-mers, allowing closer examination.

This Article

  1. Genome Res. 34: 2081-2093

Preprint Server