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What is the average coverage with good quality of whole genome sequence in read numbers (100 bp/read) and base pairs?
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Based on these experiments and their callability calculations, the authors estimate that generating 50x mapped coverage (60x before read mapping/filtering are applied) renders ~95% of the genome and ~81% of the exome callable. Intriguingly, however, the authors note that they’d sequenced an unrelated sample using the latest HiSeq chemistry and basecalling software, achieving the same level of callability with just 35x mapped coverage. If anything, this emphasizes that (as the authors suggest), a “callability” metric is far more informative to report when describing the resequencing of human genomes.
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I’m not a sequencing expert. I’m a purification scientist who uses NGS to evaluate workflows my group develops. With this perspective, we think about the sample first and the NGS workflow second. The sequencer is an exceptionally honest reporter, but it can only report on what you give it, so whether you get clean, interpretable data from an NGS workflow is largely determined before you begin.
Here are nine questions we think about, in roughly the order they matter, before...06-18-2026, 07:11 AM -
Data variability is still an issue in sequencing technologies despite the advances in reproducibility and accuracy of these platforms. But the problem does not originate in the sequencing itself, but in the previous steps, before the sample reaches the sequencer.
The first step is collection, followed by preservation and sample preparation for analysis. Most scientists overlook those steps, but not being careful might just be skewing the experiment’s results.
...06-02-2026, 10:05 AM
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