What question did this study set out to answer?

Establish criteria for evaluating mega-environment analyses and demonstrate the application of the Additive Main Effects and Multiplicative Interaction (AMMI) model for targeting adapted crop genotypes.

March 1, 1997Crop Science

Identifying Mega‐Environments and Targeting Genotypes

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Authors

HGHugh G. GauchCornell University RZRichard W. ZobelNorth Carolina State University

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Implication

Statistical modeling demonstrates effective mega-environment identification in corn trials, suggesting targeted crop breeding can maximize yields across diverse regions.

Key Points

Establish criteria for evaluating mega-environment analyses and demonstrate the application of the Additive Main Effects and Multiplicative Interaction (AMMI) model for targeting adapted crop genotypes.
Evaluated statistical strategies against four criteria: design flexibility, focus on relevant variation, dual integration of genotype and environment data, and identification of winning cultivars.
Applied the AMMI model using standard and novel biplot graphs to field trial data from a Louisiana corn (Zea mays L.) breeding program.
The AMMI model satisfied all four evaluation criteria when traditional biplots were supplemented with specialized graphs focused on mega-environment questions.
Partitioning regions into a small, workable number of mega-environments successfully captured genotype-environment interactions to support higher yields.

Cite This Study

Gauch et al. (1997) studied this question.

synapsesocial.com/papers/69d768f5f44a16d01ef30d7f https://doi.org/10.2135/cropsci1997.0011183x003700020002x

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Implication

Statistical modeling demonstrates effective mega-environment identification in corn trials, suggesting targeted crop breeding can maximize yields across diverse regions.

Identifying Mega‐Environments and Targeting Genotypes

Discussion

Member takes

Implication

Key Points

Cite This Study

Identifying Mega‐Environments and Targeting Genotypes

Discussion

Member takes

Implication

Key Points

Cite This Study

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