tai.potato: Multi-environment trial of potato
In kwstat/agridat: Agricultural Datasets

tai.potato

R Documentation

Multi-environment trial of potato

Description

Multi-environment trial of potato tuber yields

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

## Not run: 

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

## End(Not run)

kwstat/agridat documentation built on Dec. 17, 2024, 3:56 p.m.