Thirty libraries of paired-end short reads obtained with Illumina NextSeq550 sequencing platform were analyzed. Sequencing quality and length distributions were assessed using FastQC software (https://www.bioinformatics.babraham.ac.uk/projects/fastqc/) version 0.11.5. Cutadapt software version 1.9.1 [38 ] was used to remove sequencing adapters, and Prinseq-lite software version 0.20.4 [39 (link)] was implemented for filtering with the following criteria: length not less than 100 bases, mean Phred quality score not less than 30. In case if one read in a pair did not meet the above criteria, the whole pair was discarded from analysis. Additionally, Prinseq option ‘-derep 1’ was employed in order to remove possible optical replicates.
Libraries of short reads were aligned to the reference genome version SolTub_3.0 taken from Ensembl plants database [29 (link)] using STAR aligner version 2.5.3a [40 (link)].
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