Hi all, I am using Bowtie2 to align my reads to the respective references. I have three reference genomes. For three reference genomes from Bowtie2 I used -f option to give three reference index. I want to concatenate all the three reference genomes and create the index instead of giving three files. I did use cat to concatenate all the files. Is this the right way to concatenate the reference genomes into one? Does this works for bowtie2 alignment?