FASTQ Summary Statistics(fastq数据统计)
分析模块输入,原始测序数据文件,FASTQ格式,生成测序结果统计报告。测序结果统计报告,可用于生成碱基分布图,和测序质量箱线图。
为方便测序数据的分析、发布和共享,Illumina测序得到的原始图像数据经过Base Calling转化为序列数据,即FASTQ格式的测序数据文件。FASTQ格式文件可记录所测读段(read)的碱基及其质量分数。
输入:
1、FASTQ格式的原始测序数据文件:
2、设置原始数据质量值编码方式:1、Solexa 2、Illumina 1.3-1.7 3、Sanger/Illumina 1.8+
注:对于Illumina测序平台,从左到右分别对应,极早期机器、早期机器,当前或以后机器。参数的默认值为 Sanger/Illumina 1.8+, 对应目前国内测序公司主流测序仪。
关于FASTQ格式文件,请参考维基百科:https://en.wikipedia.org/wiki/FASTQ_format
输出:
每个测序循环下所有reads碱基数和质量值统计表:
1 6362991 -4 40 250734117 39.41 40 40 40 0 40 40 1396976 1329101 678730 2958184 0
2 6362991 -5 40 250531036 39.37 40 40 40 0 40 40 1786786 1055766 1738025 1782414 0
3 6362991 -5 40 248722469 39.09 40 40 40 0 40 40 2296384 984875 1443989 1637743 0
4 6362991 -4 40 248214827 39.01 40 40 40 0 40 40 2536861 1167423 1248968 1409739 0
36 6362991 -5 40 117158566 18.41 7 15 30 23 -5 40 4074444 1402980 63287 822035 245
其中,从左到右,每一列含义,如下所示:
column = column number (1 to 36 for a 36-cycles read file)
count = number of bases found in this column.
min = Lowest quality score value found in this column.
max = Highest quality score value found in this column.
sum = Sum of quality score values for this column.
mean = Mean quality score value for this column.
Q1 = 1st quartile quality score.
med = Median quality score.
Q3 = 3rd quartile quality score.
IQR = Inter-Quartile range (Q3-Q1).
lW = 'Left-Whisker' value (for boxplotting).
rW = 'Right-Whisker' value (for boxplotting).
A_Count = Count of 'A' nucleotides found in this column.
C_Count = Count of 'C' nucleotides found in this column.
G_Count = Count of 'G' nucleotides found in this column.
T_Count = Count of 'T' nucleotides found in this column.
N_Count = Count of 'N' nucleotides found in this column.