Joseph  Matt

Ph.D. Student

Office: Andrews Hall 410
Department: Aquaculture Breeding & Genetics Technology Center
Advisor: {{,Dr. Stan Allen}}



B.Sc., Biology, Wake Forest University, 2013

M.S., Fisheries Science, College of William and Mary, 2018


Research Interests


selective breeding, polyploidy, aquaculture, oysters, quantitative genetics, genomics




My research has aimed on improving oyster aquaculture, both through investigating problems faced by the industry and addressing questions important to selection and breeding.  Specifically, it has included the following: implications of chromosome loss in commercial tetraploid brood stock, evaluation of possible genetic and physiological causes of mass mortality of oysters, and most recently, evaluating the sources of variation of commercial traits in triploid oysters.


Current Projects

  • The genetic basis of “low salinity mortality” and “triploid mortality” in triploid Crassostrea virginica
  • Genetic parameters of growth traits in triploid C. virginica
  • Genetic correlations between triploid and tetraploid C. virginica
  • The relationship among “triploid mortality”, gonad development, and biochemical composition in triploid C. virginica




Guevelou E, Matt JL, and Allen SK. 2017. Glycogen concentration in freeze-dried tissues of eastern oyster (Crassostrea virginica) using near infrared reflectance spectroscopy to determine the relationship between the concentrations of the tissues excised for histological sampling and the remaining tissues.  Journal of Shellfish Research. 36.2 : 325-333.


de Sousa JT, Allen SK, Baker H, Matt JL. 2016. Aneuploid progeny of the American oyster, Crassostrea virginica, produced by tetraploid × diploid crosses: another example of chromosome instability in polyploid oysters. Genome. 59: 327–338.


Matt JL and Allen SK. 2014. Heteroploid mosaic tetraploids of Crassostrea virginica produce normal triploid larvae and juveniles as revealed by flow cytometry. Aquaculture. 432: 336-345.