Location: Aquatic Animal Health Research
Title: Disease resistance in moronid aquacultureAuthor
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Submitted to: Plant and Animal Genome Conference
Publication Type: Abstract Only Publication Acceptance Date: 11/1/2022 Publication Date: 1/14/2023 Citation: Abernathy, J.W., Lange, M.D., Farmer, B.D., Mcentire, M.E., Rawles, S.D. 2023. Disease resistance in moronid aquaculture [Abstract]. 30th Annual Plant and Animal Genome Conference, San Diego, CA, January 13-18, 2023. Interpretive Summary: Technical Abstract: White bass (Morone chrysops) and striped bass (Morone saxatilis) are parental species of hybrid striped bass (M. chrysops x M. saxatilis), a fish of increasing commercial importance throughout the US. One chief constraint to the expansion of hybrid striped bass production arises from the use of wild-catch parents in breeding programs. This is costly, unsustainable and leads to uncontrolled variation in the offspring. Our goal is to advance progress in the genetic improvement of hybrids by building additional white bass resources to facilitate selective breeding for agriculturally important traits. White bass were gathered from Arkansas, Texas and Alabama along with available domesticated strains and used to establish a breeding population for familywise evaluations of growth and nutrient utilization on alternative, sustainable diets. In addition to growth and nutritional traits, we are also interested in understanding disease resistance traits and characterizing genetic variation in this trait among moronid fish. Toward this goal, we have established baseline disease susceptibility for several pathogens among white bass, striped bass and their hybrids using our in-house disease challenge system. We are examining the genetic basis of disease resistance using both gene expression data during active infections as well as through genetic mapping of backcross populations. Progress on moronid disease research will be presented and discussed. |
