Genome Sequence Resource of Alternaria alternata DZ Causing Tobacco Brown Spot

Alternaria alternata is an economically important pathogen that can cause severe plant diseases in various crops such as citrus, pear, strawberry and tobacco. Here, we report on the genome sequence of A. alternata DZ, causing tobacco brown spot disease in most tobacco producing areas. A total of 11 contigs, including 10 essential chromosomes and 1 mitochondria genome, were assembled by combining Oxford Nanopore and Illumina sequencing technologies. All 10 assembled chromosomes enabled detection of at least one of the telomeric terminal repeat sequences CCCTAA/TTAGGG. The assembled chromosomes total 34.11 Mb in length with a GC content of 50.95%, while the mitochondrial genome is 50,595 bp length with a GC content of 29.16%. We were unable to identify any evidence of conditionally dispensable chromosomes (CDCs) in the genome of A. alternata DZ, nor were we able to locate any ACT gene orthologs. This genome resource will provide valuable insights for comparative genomics research of the Alternaria genus and serve as a useful resource in investigations of plant-pathogen molecular interactions.