yan.winterwheat: Multi-environment trial of winter wheat in Ontario

Description Format Details Source References Examples

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

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. GGE biplot analysis: A graphical tool for breeders, geneticists, and agronomists, 2002. CRC. Page 59.

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

Used with permission of Weikai Yan.

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. http://doi.org/10.2135/cropsci2006.06.0374

Examples

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## Not run: 

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

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


## End(Not run)

Example output

Loading required package: gge
Warning messages:
1: In rgl.init(initValue, onlyNULL) : RGL: unable to open X11 display
2: 'rgl_init' failed, running with rgl.useNULL = TRUE 
3: .onUnload failed in unloadNamespace() for 'rgl', details:
  call: fun(...)
  error: object 'rgl_quit' not found 

agridat documentation built on May 2, 2019, 4:01 p.m.