Multi-environment trial of winter wheat, 7 years
Multi-environment trial of winter wheat, 7 years, 8 gen
data("onofri.winterwheat")A data frame with 168 observations on the following 5 variables.
yearyear, numeric
blockblock, 3 levels
plotplot, numeric
gengenotype, 7 levels
yieldyield for each plot
Yield of 8 durum winter wheat varieties across 7 years with 3 reps.
Downloaded electronic version from here Nov 2015: https://www.casaonofri.it/Biometry/index.html
Used with permission of Andrea Onofri.
Andrea Onofri, Egidio Ciriciofolo (2007). Using R to Perform the AMMI Analysis on Agriculture Variety Trials. R News, Vol. 7, No. 1, pp. 14-19.
F. Mendiburu. AMMI. https://tarwi.lamolina.edu.pe/~fmendiburu/AMMI.htm
A. Onofri. https://accounts.unipg.it/~onofri/RTutorial/CaseStudies/WinterWheat.htm
library(agridat)
data(onofri.winterwheat)
dat <- onofri.winterwheat
dat <- transform(dat, year=factor(dat$year))
m1 <- aov(yield ~ year + block:year + gen + gen:year, dat)
anova(m1) # Matches Onofri figure 1
## Not run:
libs(agricolae)
m2 <- AMMI(dat$year, dat$gen, dat$block, dat$yield)
plot(m2)
title("onofri.winterwheat - AMMI biplot")
## End(Not run)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.