yan.winterwheat: Multi-environment trial of winter wheat in Ontario
In kwstat/agridat: Agricultural Datasets

yan.winterwheat

R Documentation

Multi-environment trial of winter wheat in Ontario

Description

Yield of 18 varieties of winter wheat grown at 9 environments in Ontario in 1993.

Format

A data frame with 162 observations on the following 3 variables.

gen: genotype
env: environment
yield: yield in metric tons per hectare

Used with permission of Weikai Yan.

Details

The yield is the mean of several reps, measured in metric tons per hectare.

This data has often been used to illustrate GGE biplots.

Source

Weikai Yan and M.S. Kang (2002). GGE biplot analysis: A graphical tool for breeders, geneticists, and agronomists. CRC. Page 59.

Weikai Yan and Nicholas A. Tinker. 2006. Biplot analysis of multi-environment trial data: Principles and applications. Table 1.

References

Weikai Yan and Manjit S. Kang and Baoluo Ma and Sheila Woods, 2007, GGE Biplot vs. AMMI Analysis of Genotype-by-Environment Data, Crop Science, 2007, 47, 641–653. https://doi.org/10.2135/cropsci2006.06.0374

Examples

## Not run: 

library(agridat)

data(yan.winterwheat)
dat <- yan.winterwheat

libs(gge)
m1 <- gge(dat, yield ~ gen*env)
biplot(m1, flip=c(1,1), hull=TRUE,
       main="yan.winterwheat - GGE biplot")


## End(Not run)

kwstat/agridat documentation built on Nov. 2, 2024, 6:19 a.m.