denis.ryegrass: Plant strength of perennial ryegrass in France

Description

Plant strength of perennial ryegrass in France for 21 genotypes at 7 locations.

Arguments

source

Jean-Baptiste Denis and John C. Gower, 1996. Asymptotic confidence regions for biadditive models: interpreting genotype-environment interaction, Applied Statistics, 45, 479-493.

Details

INRA conducted a breeding trial in western France with 21 genotypes at 7 locations. The observed data is 'strength' averaged over 7-10 plants per plot and three plot per location (after adjusting for blocking effects). Each plant was scored on a scale 0-9. The original data had a value of 86.0 for genotype G1 at location L4--this was replaced by an additive estimated value of 361.2 as in Gower and Hand (1996).

References

Gower, J.C. and Hand, D.J., 1996. Biplots. Chapman and Hall.

Examples

Run this code

dat <- denis.ryegrass
anova(aov(strength ~ gen + loc, dat))

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