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Strategies for Improved Oyster Yield and Disease Resistance Through Genetic Selection

Understanding the impact of triploids vs. diploids on oyster growth and survival rates, and the role of genetic selection in managing diseases like Dermo infection. Genetic polymorphism influences early life strategies in oysters, highlighting the importance of selective breeding for optimal yield and disease resistance. This comprehensive overview delves into the genetic and phenotypic aspects impacting oyster production and health.

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Strategies for Improved Oyster Yield and Disease Resistance Through Genetic Selection

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  1. Triploidspresentedhighersurvivalrates thandiploids Increasedgrowth rate andsurvivalinthetriploidsisitseffecton final yieldofoyster “meat”.

  2. Selection for faster growing oysters is another strategy that can provide a practical method for managing around Dermo infections (but not MSX disease A diferença entre diploides e triploidesbaseia-se apenasnadiferença de salinidades. A grandediferença reside nastetraploides “produzidas” porhibridação XB com DBY – 4DXB, apresentandoestasmaiorresistencia as doenças.

  3. genetic polymorphism in early life-history seems to range between two extreme genetically-based “strategies”: (1) fast growing larvae settling large but experiencing low settlement success and poor growth and survival after settlement (2) slow growing larvae settling small but experiencing higher settlement success and better growth and survival after settlement. (Taris et al., 2006). On a population with these extremes, size selection by culling slow growing larvae would lead to reduced settlement success, and reduced growth and survival after settlement. However, positive phenotypic relationships were shown between larval and spat growth in both C. virginica and C. gigas

  4. Allen, S., Gaffney,P., Ewart, J. (1993). Genetic Improvement of the Eastern Oyster for Growth and Disease ResistanceintheNortheast. Aquaculturecenter, 210. VirginiaInstituteof marine Science. (2010).TheAquacultureGeneticsandBreedingTechnology’s . Taris, N., Ernande, B., McCombie, H., Broudry, P. (2006). Phenotypic and genetic consequences of size selection at the larval stage in the Pacific oyster (Crassostreagigas). Journal of Experimental Marine Biology and Ecology. 333, 147–158

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