Disease resistant and triploid stocks are produced under license with the the College of William and Mary. Breeding work by the Aquaculture Genetics, and Breeding Technology Center (ABC) at Virginia Institute of Marine Science (VIMS).
Advancements in oyster breeding technology by VIMS-ABC is largely credited for the existence and widespread success of Virginia’s oyster aquaculture industry. The process of selective breeding has enabled ABC to create distinct lines of genetically superior, disease resistant brood stock made available for hatcheries to propagate and sell as seed. OSH offers 4 different product lines from ABC for our farmers to choose from to best suit their growing location: DEBY, LOLA, HNRY and LILY. So, which one should you choose and what’s the difference? The two main differentiators when it comes to these line options are 1.) the mode of selection (mass selected vs. family breeding), and 2) the salinity in which they have been selected.
DEBY and LOLA
Mass selection was used as the principle means to attain disease resistance, by breeding survivors. Later, larger oysters were also selected. The resulting two lines (DEBY, LOLA) were the foundation of early releases of brood stock by ABC. Now, little selective pressure is applied to DEBY and LOLA and the focus is maintenance of genetic health of the lines.
HNRY and LILY
The family selected lines are undergoing intense, directed selection by ABC, with continual improvements each generation. These newest improvements are provided to OSH each year. Family breeding provides a means of adding multiple traits, such as meat yield and cup shape to the principle ones of disease resistance and fast growth. HNRY (high salinity) and LILY (low salinity) are tested in separate environments to provide a full range of performance across mid-Atlantic conditions.
A medium to high salinity stock. MSX resistant and Dermo tolerant. The ancestors of this stock are from Delaware Bay MSX resistant lines, but have been selected for disease resistance in York River for over 20 years. This stock is a good all around performer with a proven track record.
A low to medium salinity stock with moderate resistance auto MSX and high tolerance to Dermo. Notable for good growth performance at low salinities. The ancestors of this stock come from Louisiana and have been hybridized to mid-Atlantic lines. This stock exhibits fast growth, but less MSX resistance than others.
Family - Selected Line
A medium to high salinity stock. MSX resistant and Dermo tolerant. The ancestors of this stock are a composite of early mass-selected high salinity lines that are now bred using family breeding techniques. Selection traits include: fast growth, high survival, shell shape, and high meat-shell ratio.
Family - Selected Lines
A low salinity stock with less disease tolerance, but good growth performance at low salinity. The ancestors of this stock are a composite of early mass-selected lines with established disease tolerance that are now bred using family breeding techniques. Selection traits include: fast growth, high survival, shell shape, and high meat-shell ratio.