Genotypic stability — genotypic_stability • toolStability

genotypic_stability calculate variance of a genotype across environments.

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.'

Value

a data table with genotypic stability

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.

References

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

Author

Tien-Cheng Wang

Examples

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