genotypic_stability {toolStability}

Genotypic stability

Description

genotypic_stability calculate variance of a genotype across environments.

Usage

genotypic_stability(data, trait, genotype, environment, unit.correct = FALSE)

Arguments

data

a dataframe containing trait, genotype and environment.

trait

colname of a column containing a numeric vector of interested trait to be analysized.

genotype

colname of a column containing a character or factor vector labeling different genotypic varieties

environment

colname of a column containing a character or factor vector labeling different environments

unit.correct

logical, default is FALSE, returning the stability index with unit equals to squared unit of trait; when TRUE, returning stability index with the unit as same as unit of trait.'

Details

Genotypic stability (Hanson, 1970) is calculatd based on regression function. Variety with low stability variance is considered as stable. Equation of genotypic stability can be found in vignette file.

Value

a data table with genotypic stability

Author(s)

Tien-Cheng Wang

References

Hanson WD (1970). “Genotypic stability.” Theoretical and Applied Genetics, 40(5), 226–231. ISSN 1432-2242, doi: 10.1007/BF00285245.

Examples

data(Data)
genotypic.stability <- genotypic_stability(
 data = Data,
 trait = "Yield",
 genotype = "Genotype",
 environment = "Environment",
 unit.correct = FALSE)