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A Two‐Part Strategy for Using Genomic Selection to Develop Inbred Lines

We propose a strategy for implementing genomic selection in plant breeding programs for developing inbred lines that reorganizes traditional breeding programs into two distinct components. These components are: (i) a population improvement component to develop improved germplasm through rapid recurr...

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Published in:Crop science 2017-09, Vol.57 (5), p.2372-2386
Main Authors: Gaynor, R. Chris, Gorjanc, Gregor, Bentley, Alison R., Ober, Eric S., Howell, Phil, Jackson, Robert, Mackay, Ian J., Hickey, John M.
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container_issue 5
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container_title Crop science
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creator Gaynor, R. Chris
Gorjanc, Gregor
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description We propose a strategy for implementing genomic selection in plant breeding programs for developing inbred lines that reorganizes traditional breeding programs into two distinct components. These components are: (i) a population improvement component to develop improved germplasm through rapid recurrent selection and (ii) a product development component to identify new inbred varieties or parents for hybrids using traditional breeding program designs. Stochastic simulations of entire breeding programs over 40 yr were used to evaluate the effectiveness of this strategy relative to a conventional program without genomic selection and programs using three standard strategies of implementing genomic selection. Cost effectiveness was measured by constraining all programs to approximately equal annual operating costs and directly comparing each program's overall performance. Programs using the two‐part strategy generated between 2.36 and 2.47 times more genetic gain than the conventional program and between 1.31 and 1.46 times more genetic gain than the best performing standard genomic selection strategy. These results indicate that the two‐part strategy is a cost‐effective strategy for implementing genomic selection in plant breeding programs.
doi_str_mv 10.2135/cropsci2016.09.0742
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title A Two‐Part Strategy for Using Genomic Selection to Develop Inbred Lines
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