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most of reads did not combined

Open 2061574124 opened this issue 1 year ago • 0 comments

/home/dell/bioinfo/FLASH2/flash2 -M 300 --min-overlap 10 --max-mismatch-density 0.25 /home/dell/bioinfo/FLASH2/C73.RemoveHost_1.fastp.fastq /home/dell/bioinfo/FLASH2/C73.RemoveHost_2.fastp.fastq [FLASH] Starting FLASH v2.2.00 [FLASH] Fast Length Adjustment of SHort reads [FLASH]
[FLASH] Input files: [FLASH] /home/dell/bioinfo/FLASH2/C73.RemoveHost_1.fastp.fastq [FLASH] /home/dell/bioinfo/FLASH2/C73.RemoveHost_2.fastp.fastq [FLASH]
[FLASH] Output files: [FLASH] ./out.extendedFrags.fastq [FLASH] ./out.notCombined_1.fastq [FLASH] ./out.notCombined_2.fastq [FLASH] ./out.hist [FLASH] ./out.histogram [FLASH]
[FLASH] Parameters: [FLASH] Min overlap: 10 [FLASH] Min overlap outie: 35 [FLASH] Max overlap: 300 [FLASH] Max mismatch density: 0.250000 [FLASH] Allow "outie" pairs: true [FLASH] Cap mismatch quals: false [FLASH] Combiner threads: 40 [FLASH] Input format: FASTQ, phred_offset=33 [FLASH] Output format: FASTQ, phred_offset=33 [FLASH]
[FLASH] Starting reader and writer threads [FLASH] Starting 40 combiner threads [FLASH] Processed 25000 read pairs [FLASH] Processed 50000 read pairs [FLASH] Processed 75000 read pairs ....................................... [FLASH] Processed 26850000 read pairs [FLASH] Processed 26864060 read pairs [FLASH]
[FLASH] Read combination statistics: [FLASH] Total pairs: 26864060 [FLASH] Discarded pairs: 0 [FLASH] Percent Discarded: 0.00% [FLASH] Combined pairs: 418616 [FLASH] Innie pairs: 411600 (98.32% of combined) [FLASH] Outie pairs: 7016 (1.68% of combined) [FLASH] Uncombined pairs: 26445444 [FLASH] Percent combined: 1.56% [FLASH]
[FLASH] Writing histogram files. [FLASH]
[FLASH] FLASH v2.2.00 complete! [FLASH] 309.186 seconds elapsed

most of paired-end reads did not combined

and here list the head of notcombined_1.fastq and notcombined_2.fastq: dell@dell-PowerEdge-R720:~/bioinfo/FLASH2$ head /home/dell/bioinfo/FLASH2/out.notCombined_1.fastq @K00137:533:HMNJYBBXX:7:2208:3376:43251 1:N:0 GGCCCGGACTTCTGGCAAGGTAAAGAGAACCCTTTATTTATCGAGTCCGATAACCTTTGTGCCGCATGGAAGAAATATGCTATTGAAAAAGACAACCTCTCTGTCCGCGTAGGCCGCTGGAACATTCCGGGCGAACCTATTGTCATATTG + eeeiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii @K00137:533:HMNJYBBXX:7:1228:12601:20832 1:N:0 GACCGCACGTTTGACCGGATTGGTTTCAATCGTATTGACGATGAAGAGTTCCGCAAGCTTGTGAAAGCCCGTCTGGCATATCCAACGAGCAAGGCTGCTACGGTGGAATATCTGAAAAACCACTTTGACGAGGATGTGGATCTTTCAAGA + eeeiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiieiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiieiiiiiiiiiieeiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiieiiiiii @K00137:533:HMNJYBBXX:7:1111:11393:46487 1:N:0 GGATGAAGTGTTTGCAGGTATTGAACACCTGCAGCATCGGGCGGCCGTCGGCGTCAAAGTTGAGCCGGTAGTGGAACTGCATCTTTCCCGCAAGGCGGGTGTGGTCGCCAGGCTTCCAGTGCAGGAAGTTGGGGCTCCGCTCCATCATGG dell@dell-PowerEdge-R720:~/bioinfo/FLASH2$ head /home/dell/bioinfo/FLASH2/out.notCombined_2.fastq @K00137:533:HMNJYBBXX:7:2208:3376:43251 2:N:0 ACAACCTTATCCGTTTCCGTCAGGTTATACCGGTAGAAACTCTCTACCACCTTTCCGGTGGCGTATGCAAACATCGAGGCTTCATCGTAGTCACCGTATGCGTGCAGTGAATCCACCTGATAGTGTTCCCACATCTCCGCATAAATTTCA + eeeiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiieiiiieieiiiiiiiiiiiiiiieiiiiiiiieiiiiiiiiiiiiiiiiiiiieeiiiiiiiiiiiiiiiiiiieiiiiiiiiiieeeV[eee` @K00137:533:HMNJYBBXX:7:1228:12601:20832 2:N:0 CTGTGTCGTCCCTCTTTAGAAAAGCCGGTCTTGCGCAAGTCGTCCTCATAATCCGCTTCAAAGTAAAGTGTGGTGACATCATGAATAGCACACCGATATTTCCACCGAACAGTTTTGCTGTATGGCGCACGCTGATGTCCTGTACGACTT + eeiiiiiiiiiiiiiiiiiiieiieiiiiiiiiiiiieiiiiiiiiiiiiiiiiiiiiiieiiiiiieiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiei[eiiiiiiiiiiiiiiiiiiiiiiiiiii @K00137:533:HMNJYBBXX:7:1111:11393:46487 2:N:0 CTACCGCATCAAAGAGCTGTACGGCTGCACCGGCCGCCCCAACGAGGGCCTGCGCATTGACCCGGTGGAACAGGCCCGGCGCATCCGGGAGGCGGAGCAGAACGACCCCGTGCTGCGGGGGCGGGTGATCCATGGCGTTGCCGACCCGGC dell@dell-PowerEdge-R720:~/bioinfo/FLASH2$

i wonder how to fix. thanks so much

2061574124 avatar Jun 20 '24 07:06 2061574124