## Arguments

- .data
The dataset containing the columns related to Environments, Genotypes, replication/block and response variable(s)

- env
The name of the column that contains the levels of the environments.

- gen
The name of the column that contains the levels of the genotypes.

- rep
The name of the column that contains the levels of the replications/blocks

- resp
The response variable(s). To analyze multiple variables in a single procedure use, for example,

`resp = c(var1, var2, var3)`

.- verbose
Logical argument. If

`verbose = FALSE`

the code will run silently.

## Value

An object of class `ge_reg`

with the folloing items for each
variable:

data: The data with means for genotype and environment combinations and the environment index

anova: The analysis of variance for the regression model.

regression: A data frame with the following columns:

`GEN`

, the genotypes;`b0`

and`b1`

the intercept and slope of the regression, respectively;`t(b1=1)`

the calculated t-value;`pval_t`

the p-value for the t test;`s2di`

the deviations from the regression (stability parameter);`F(s2di=0)`

the F-test for the deviations;`pval_f`

the p-value for the F test;`RMSE`

the root-mean-square error;`R2`

the determination coefficient of the regression.b0_variance: The variance of b0.

b1_variance: The variance of b1.

## References

Eberhart, S.A., and W.A. Russell. 1966. Stability parameters for comparing Varieties. Crop Sci. 6:36-40. doi:10.2135/cropsci1966.0011183X000600010011x

## Author

Tiago Olivoto, tiagoolivoto@gmail.com