Reference exome data for Australian Aboriginal populations to support health-based research

Area of Science:

• Genomics
• Population Genetics
• Bioinformatics

Background:

• Whole exome sequencing (WES) is vital in research and clinical settings.
• A significant gap exists in reference genomic data for Aboriginal Australians.
• This limits the translation of genomic research into health applications for this population.

Purpose of the Study:

• To generate a comprehensive catalogue of genetic variants from Aboriginal Australians.
• To establish a foundational reference dataset for genomic studies in this population.
• To compare genetic diversity between Aboriginal groups in the Northern Territory and Western Australia.

Main Methods:

• Whole exome sequencing (WES) was performed on 50 Aboriginal individuals from the Northern Territory (NT).
• Sequence data were processed using an 'intersect-then-combine' (ITC) approach with GATK and SAMtools.
• Variant data were compared with 72 previously published exomes from a Western Australian (WA) Martu population.

Main Results:

• A total of 289,829 variants were identified in the NT cohort and 248,374 in the WA cohort.
• 166,719 variants were common to both cohorts.
• 123,110 variants were private to the NT cohort and 81,655 were private to the WA cohort.

Conclusions:

• The study provides a valuable reference dataset for genomic research involving Aboriginal Australians.
• This catalogue aids in understanding the genetic landscape of Aboriginal populations.
• The findings support the advancement of health-based genomic research for Aboriginal communities.