Hedgecock, Improving Pacific oyster broodstocks

The objective of this project is to advance the fundamental knowledge of the genetic and physiological bases of hybrid vigor in Pacific oyster and investigate if crossbreeding can improve oyster broodstocks.

The project has the following objectives:

  1. To test the performance of Pacific oyster (Crassostrea gigas) hybrids, produced by controlled crosses of existing WRAC inbred lines, at a commercial scale, in different environments, and in comparison to both existing commercial stocks and select families in the Molluscan Broodstock Program (MBP)
  2. To make new inbred lines from the pedigreed families being produced by the MBP, using cryopreservation and brother-sister matings
  3. To create triploids from combinations of two and three inbred lines and test their early hatchery and nursery performance
  4. To create tetraploid lines of varying genetic composition from these triploids and test their triploid and tetraploid progeny after mating to diploid and tetraploid stocks, respectively
  5. To measure the metabolic performance of inbred and hybrid larvae at whole organism, cellular, and sub-cellular levels to determine the metabolic basis of hybrid vigor and to enable subsequent correlation of larval metabolism with growth to market size

Project Summary


University of Washington
School of Aquatic & Fishery Sciences

Box 355020, Seattle, WA 98195
1122 NE Boat St, Seattle, WA 98105


Grants and Funding