agridat (version 1.8.1)

pacheco.soybean: Soybean yields in Brazil.

Description

Yields of 18 soybean genotypes at 11 environments in Brazil.

source

R M Pacheco, J B Duarte, R Vencovsky, J B Pinheiro, A B Oliveira, (2005). Use of supplementary genotypes in AMMI analysis. Theor Appl Genet, 110, 812-818. Used with permission of Robert Pacheco.

Details

In each environment was used an RCB design with 3 reps. The means of the reps are shown here.

Examples

dat <- pacheco.soybean

# AMMI biplot similar to Fig 2 of Pacheco et al.
require(agricolae)
m1 <- with(dat, AMMI(env, gen, REP=1, yield))
bip <- m1$biplot[,1:3]
# Fig 1 of Pacheco et al.
with(bip, plot(yield, PC1, cex=0.0,
               text(yield,PC1,labels=row.names(bip), col="blue"),
               xlim=c(1000,3000),main="AMMI BIPLOT",frame=TRUE))