NCCCWANational Center for Cool and Cold Water Aquaculture (USDA)
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By 2013, NCCCWA scientists had developed a new rainbow trout line, called ARS- Fp-R, that is resistant to bacterial cold water disease (BcWD).
Development of the resistant line took 10 years of selection using traditional pedigree-based methods, so NCCCWA scientists partnered with the company to evaluate genomic selection to make faster progress.
In research published in BioMed Centrai in 2017, NCCCWA scientists showed that genomics is much more accurate than conventional breeding methods in predicting the genetic potential for BCWD resistance in the offspring of fish used for breeding.
Scientists at NCCCWA are also investigating mechanisms that cause fish to be disease resistant.
Based on the results of several field trials and laboratory-evaluation data, disease -resistant rainbow trout germplasm was released in 2012 and 2013 to stakeholders, who are propagating the line and continuing to evaluate its performance in large-scale trials in conjunction with NCCCWA scientists.--By Sandra Avant, ARS.
NCCCWA and FI scientists are also determining how different fish feeds affect fish performance and health and water quality.
In 2003, NCCCWA molecular biologist Greg Wiens and microbiologist Tim Welch began talking to industry trout producers about their issues and concerns, and coldwater disease came up most often.