The acuminata genome, designated by the letter A in the nomenclature system used to classify edible bananas, is the genome of Musa acuminata, a species of wild bananas that has been involved in the domestication of the vast majority of edible bananas. It is also the first genome to be sequenced in the genus Musa. The sequenced genome was an haploid version of the subspecies malaccensis, DH Pahang. At the time of the release of the genome sequence, 91% of the genome had been sequenced and 92% of the predicted 36,542 genes had been positioned on the 11 chromosomes.
The haploid genome size is 600 Mb. It is larger than the genome of Musa balbisiana, which donated the B genome found in many edible bananas. The genome is larger than the genome of rice and Arabidopsis but smaller than the one of maize and wheat.
Plant genomes consists largely of repetitive DNA including include transposable elements, satellite DNAs, simple sequences and tandem repeats which represents approximately 30% of the A genome. These genome features might be responsible for the variation in genome size observed in Musa species.
Comparison with B genome
In 2013, a team of Belgian and Malaysian scientists sequenced the genome of a Musa balbisiana accession and used the acuminata reference sequence as a template onto which they aligned their fragments of balbisiana DNA. The resulting B genome was 79% the size of the A genome. The number of genes was predicted to be 36,638.