Developing Genomic Resources Towards Understanding the Influence of an Introgressed Inversion on Atlantic Bluefin Tuna’s Recovery.
Loading...
Date
2025-03
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
University of New Brunswick
Abstract
The influence of introgression on the recovery of depleted populations is currently an empirically understudied evolutionary process, despite its function in providing adaptive genetic variation which may favour adaptation and speciation. Atlantic bluefin tuna (Thunnus thynnus; hereafter, ABFT) exemplifies a unique case of introgression, where a chromosomal inversion was introduced into their population from another tuna species. Given that tuna have undergone a recent rapid demographic recovery from near extinction levels due to overexploitation, it is opportune to investigate the correlation between the inversion and ABFT’s recovery. Resources were developed for the target application of investigating the correlation. Tissue, DNA and high-quality sequence banks, spanning a decade, were created and assessed temporally, using low coverage whole genome sequencing for the sequence bank. DNA content decreased as storage duration increased; however, DNA quality remained stable. Additionally, a comparative genomic approach was employed to putatively locate the inversion on chromosome 24.