MAPQ - Mapping Quality

定义

MAPQ: Mapping Quality.
It equals -10 log10 Pr{mapping position is wrong}, rounded to the nearest integer.
A value 255 indicates that the mapping quality is not available.

说明

MAPQ = -10 * log10{mapping出错的概率}
当MAPQ=255的时候，代表MAPQ没有意义，就是一个占位符。

例如，当MAPQ>30时，Pr<0.001，即mapping出错的概率小于0.1%

• https://zhuanlan.zhihu.com/p/35495052
• https://www.jianshu.com/p/68e09e211873
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• https://genome.sph.umich.edu/wiki/SAM
• https://genome.sph.umich.edu/wiki/Mapping_Quality_Scores
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• https://blog.csdn.net/geekfocus/article/details/104430344
• http://biofinysics.blogspot.com/2014/05/how-does-bowtie2-assign-mapq-scores.html
• https://sequencing.qcfail.com/articles/mapq-values-are-really-useful-but-their-implementation-is-a-mess/
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• http://www.htslib.org/doc/samtools-mpileup.html
• https://www.jianshu.com/p/a3791cf16474
• https://www.biostars.org/p/392106/
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