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Increased prediction accuracy in wheat breeding trials using a marker × environment interaction genomic selection model.

Lopez-Cruz M, Crossa J, Bonnett D, Dreisigacker S, Poland J, Jannink JL, Singh RP, Autrique E, de los Campos G - G3 (Bethesda) (2015)

Bottom Line: We compared the M×E model with a stratified (i.e., within-environment) analysis and with a standard (across-environment) GS model that assumes that effects are constant across environments (i.e., ignoring G×E).The M×E model decomposes marker effects and genomic values into components that are stable across environments (main effects) and others that are environment-specific (interactions).Therefore, in principle, the interaction model could shed light over which variants have effects that are stable across environments and which ones are responsible for G×E.

View Article: PubMed Central - PubMed

Affiliation: Department of Plant, Soil and Microbial Sciences, Michigan State University (MSU), East Lansing, Michigan 4882.

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Related in: MedlinePlus

Box-plot of adjusted grain yield by environment and cycle. Environments are denoted by a sequence of codes: 0i, 2i, and 5i denote the number of irrigation cycles; B/F denotes whether the planting system was “bed” (B) or “flat” (F); N/H denotes whether planting date was normal (N) or late (H, simulating heat); Z indicates no tillage.
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fig1: Box-plot of adjusted grain yield by environment and cycle. Environments are denoted by a sequence of codes: 0i, 2i, and 5i denote the number of irrigation cycles; B/F denotes whether the planting system was “bed” (B) or “flat” (F); N/H denotes whether planting date was normal (N) or late (H, simulating heat); Z indicates no tillage.

Mentions: Figure 1 shows box-plots of adjusted yield per data set and environmental condition. As expected, average yield increased with the number of irrigation events and, other factors being equal, late planting (H) produced lower yields than normal planting (N). In all cases, the empirical distribution of grain yield within data set and environment was reasonably symmetric.


Increased prediction accuracy in wheat breeding trials using a marker × environment interaction genomic selection model.

Lopez-Cruz M, Crossa J, Bonnett D, Dreisigacker S, Poland J, Jannink JL, Singh RP, Autrique E, de los Campos G - G3 (Bethesda) (2015)

Box-plot of adjusted grain yield by environment and cycle. Environments are denoted by a sequence of codes: 0i, 2i, and 5i denote the number of irrigation cycles; B/F denotes whether the planting system was “bed” (B) or “flat” (F); N/H denotes whether planting date was normal (N) or late (H, simulating heat); Z indicates no tillage.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4390573&req=5

fig1: Box-plot of adjusted grain yield by environment and cycle. Environments are denoted by a sequence of codes: 0i, 2i, and 5i denote the number of irrigation cycles; B/F denotes whether the planting system was “bed” (B) or “flat” (F); N/H denotes whether planting date was normal (N) or late (H, simulating heat); Z indicates no tillage.
Mentions: Figure 1 shows box-plots of adjusted yield per data set and environmental condition. As expected, average yield increased with the number of irrigation events and, other factors being equal, late planting (H) produced lower yields than normal planting (N). In all cases, the empirical distribution of grain yield within data set and environment was reasonably symmetric.

Bottom Line: We compared the M×E model with a stratified (i.e., within-environment) analysis and with a standard (across-environment) GS model that assumes that effects are constant across environments (i.e., ignoring G×E).The M×E model decomposes marker effects and genomic values into components that are stable across environments (main effects) and others that are environment-specific (interactions).Therefore, in principle, the interaction model could shed light over which variants have effects that are stable across environments and which ones are responsible for G×E.

View Article: PubMed Central - PubMed

Affiliation: Department of Plant, Soil and Microbial Sciences, Michigan State University (MSU), East Lansing, Michigan 4882.

Show MeSH
Related in: MedlinePlus