stability.udach {agrostab}R Documentation

Steadiness of stability index

Description

This function calculates the Udachin's parameters of stability

Usage

stability.udach(dataf, res_var, gen_var, env_var, rep_var, plotIt = TRUE)

Arguments

dataf

the name of the data frame containing the data to analyze.

res_var

the response variable.

gen_var

the genotypes variable.

env_var

the environments variable.

rep_var

the replications variable.

plotIt

a logical value specifying if plot should be drawn; default is TRUE

Value

Returns a data frame:

Ust

the genotype's Steadiness of stability index

intensity

the genotype's intensity value

max_val

the genotype's yield max value

min_val

the genotype's yield min value

S_opt

the genotype's standard deviation at optimal environment

S_lim

the genotype's standard deviation at limited environment

I_opt

the genotype's stability index at optimal environment

I_lim

the genotype's stability index at limited environment

References

Udachin R.A. 1990. Methods of assessing the ecological plasticity of wheat varieties. Selection and seed production. 5: 2-6. (In Russian)

Examples

data(exp_data)
stability.udach(exp_data,"yield","gen","env","rep")

[Package agrostab version 0.1.0 Index]