Breeding for POMS Resistance: The latest improvements

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Presentation transcript:

Breeding for POMS Resistance: The latest improvements Peter Kube (CSIRO) and Matt Cunningham Shellfish Futures, 17 August 2019

The story so far … one year old resistance

The story so far … one year old resistance

The story so far … one year old resistance

The story so far … one year old resistance

The story so far … one year old resistance

The story so far … one year old resistance

The story so far … one year old resistance

One year old resistance – genetic trend Commercial Release 2018

Spat resistance … the next part Year Class Number Trials Average Survival Number oysters How good were the trials? 2016 2 18% 26,763 2 passable 2017 5 13% 99,059 1 passable, 3 reasonable, 1 good 2018 35% 151,750 2 good, 3 very good

Spat resistance … the next part Year Class Number Trials Average Survival Number oysters How good were the trials? 2016 2 18% 26,763 2 passable 2017 5 13% 99,059 1 passable, 3 reasonable, 1 good 2018 35% 151,750 2 good, 3 very good

Spat resistance … the next part Year Class Number Trials Average Survival Number oysters How good were the trials? 2016 2 18% 26,763 2 passable 2017 5 13% 99,059 1 passable, 3 reasonable, 1 good 2018 35% 151,750 2 good, 3 very good

Spat resistance … different POMS severities Year Class Site (Farm) Measure Date Survival POMS severity 2018 Pittwater (Josh Poke) 31-Jan 2019 15% Severe Pittwater (Tony Burns) 21-Feb-2019 32% Moderate Pipeclay (Shellfish Culture) 18 Mar-2019 30% 11-Apr-2019 47% Light 15-Apr-2019 50%

Spat resistance … the next part

Spat resistance … the next part

Spat resistance … the next part

Best family 2018 year class 114 alive (66%) 58 dead (34%)

Best family 2018 year class

Spat resistance – genetic trend MODERATE POMS SEVERE POMS Rate of gain = 13% per year Rate of gain = 8% per year

The main messages One year old stock now has high POMS resistance and our ability to keep improving that trait has plateaued Spat resistance is now the focus and is a work in progress Growers will need to “manage around” POMS for spat for probably the next 5 years, but high spat resistance is possible