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    Genomic selection for white spot syndrome virus resistance in whiteleg shrimp boosts survival under an experimental challenge test

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    Author
    Lillehammer, M; Bangera, R; Salazar, M; Vela, S; Erazo, EC; Suarez, A; Cock, J; Rye, M; Robinson, NA
    Date
    2020-12-25
    Source Title
    Scientific Reports
    Publisher
    NATURE RESEARCH
    University of Melbourne Author/s
    Robinson, Nicholas
    Affiliation
    School of BioSciences
    Metadata
    Show full item record
    Document Type
    Journal Article
    Citations
    Lillehammer, M., Bangera, R., Salazar, M., Vela, S., Erazo, E. C., Suarez, A., Cock, J., Rye, M. & Robinson, N. A. (2020). Genomic selection for white spot syndrome virus resistance in whiteleg shrimp boosts survival under an experimental challenge test. SCIENTIFIC REPORTS, 10 (1), https://doi.org/10.1038/s41598-020-77580-3.
    Access Status
    Open Access
    URI
    http://hdl.handle.net/11343/253055
    DOI
    10.1038/s41598-020-77580-3
    Open Access at PMC
    http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7688931
    Abstract
    White spot syndrome virus (WSSV) causes major worldwide losses in shrimp aquaculture. The development of resistant shrimp populations is an attractive option for management of the disease. However, heritability for WSSV resistance is generally low and genetic improvement by conventional selection has been slow. This study was designed to determine the power and accuracy of genomic selection to improve WSSV resistance in Litopenaeus vannamei. Shrimp were experimentally challenged with WSSV and resistance was evaluated as dead or alive (DOA) 23 days after infestation. All shrimp in the challenge test were genotyped for 18,643 single nucleotide polymorphisms. Breeding candidates (G0) were ranked on genomic breeding values for WSSV resistance. Two G1 populations were produced, one from G0 breeders with high and the other with low estimated breeding values. A third population was produced from "random" mating of parent stock. The average survival was 25% in the low, 38% in the random and 51% in the high-genomic breeding value groups. Genomic heritability for DOA (0.41 in G1) was high for this type of trait. The realised genetic gain and high heritability clearly demonstrates large potential for further genetic improvement of WSSV resistance in the evaluated L. vannamei population using genomic selection.

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