tai: Tai's stability analysis

In reyzaguirre/st4gi: Statistical tools for genetic improvement

Tai's stability analysis

Description

This function runs Tai's stability analysis (Tai, G. C. C., 1971). It assumes a RCBD with fixed effects for genotypes and random effects for environments.

Usage

tai(trait, geno, env, rep, dfr, maxp = 0.1)

Arguments

trait	The name of the column for the trait to analyze.
geno	The name of the column that identifies the genotypes.
env	The name of the column that identifies the environments.
rep	The name of the column that identifies the replications.
dfr	The name of the data frame.
maxp	Maximum allowed proportion of missing values to estimate, default is 10%.

Details

If the data set is unbalanced, a warning is produced.

Value

It returns the alpha and lambda values for each genotype for the Tai stability analysis.

Author(s)

Raul Eyzaguirre.

References

Tai, G. C. C. (1971). Genotypic Stability Analysis and Its Application to Potato Regional Trials, Crop Science, Vol 11.

Examples

model.tai <- tai("y", "geno", "env", "rep", met8x12)
model.tai$Tai_values

reyzaguirre/st4gi documentation built on April 30, 2024, 5:45 a.m.