Multi-environment trial of potato

Usage

data("tai.potato")

Format

A data frame with 48 observations on the following 6 variables.

yield

yield, kg/plot

gen

genotype code

variety

variety name

env

environment code

loc

location

year

year

Details

Mean tuber yield of 8 genotypes in 3 locations over two years. Katahdin and Sebago are check varieties. Each location was planted as a 4-rep RCB design.

In Tai's plot of the stability parameters, F5751 and Sebago were in the average stability area. The highest yielding genotype F6032 had an unstable performance.

Source

G.C.C. Tai, 1971. Genotypic stability analysis and its application to potato regional trials. Crop Sci 11, 184-190. Table 2, p. 187. https://doi.org/10.2135/cropsci1971.0011183X001100020006x

References

George Fernandez (1991). Analysis of Genotype x Environment Interaction by Stability Estimates. Hort Science, 26, 947-950.

Examples

if (FALSE) {

library(agridat)
data(tai.potato)
dat <- tai.potato

libs(lattice)
dotplot(variety ~ yield|env, dat, main="tai.potato")

# fixme - need to add tai() example

# note, st4gi::tai assumes there are replications in the data
# https://github.com/reyzaguirre/st4gi/blob/master/R/tai.R
}