dti: Estimation of Drought Tolerance Indices.

In gpbStat: Comprehensive Statistical Analysis of Plant Breeding Experiments

Estimation of Drought Tolerance Indices.

Description

Estimation of Drought Tolerance Indices.

Usage

dti(data, environment, genotype, traits, ns, st)

Arguments

data	dataframe containing following variables
environment	column with two levels i.e., non-stress and stress conditions
genotype	genotypes evaluated
traits	trait of interest
ns	name of level indicating evaluation under non-stress (irrigated) conditions
st	name of level indicating evaluation under stress conditions

Details

Estimation various Drought Tolerance Indices of genotypes evaluated under stress and non-stress conditions of both replicated and non-replicated data.

Value

TOL	Stress tolerance.
STI	Stress tolerance index.
SSPI	Stress susceptibility percentage index.
YI	Yield index.
YSI	Yield stability index.
RSI	Relative stress index.
MP	Mean productivity.
GMP	Geometric mean productivity
HM	Harmonic mean.
MRP	Mean relative performance.
PYR	Percent yield Reduction.
PYR	Drought Susceptibility Index.

Note

The function can handle both replicated and non-replicated data refer the examples.

Author(s)

Nandan Patil [e-mail]

References

Lamba, K., Kumar M., Singh V., Chaudhary L., Sharma R., Yashveer S. and Dalal, M. S. (2023). Heat stress tolerance indices for identification of the heat tolerant wheat genotypes. Scientific Reports, 13(1). https://doi.org/10.1038/s41598-023-37634-8 Fischer, R. and Maurer, R. (1978) Drought Resistance in Spring Wheat Cultivars. I. Grain Yield Responses. Australian Journal of Agricultural Research, 29, 897-912. https://doi.org/10.1071/AR9780897

See Also

ltc, ltcchk, ltcmt

Examples

## Not run: # Estimating drought tolerance indices
library(gpbStat)

data(datdti)
result1 =  dti(datdti, environment = ENV, genotype = GEN, datdti[,3:8],
              ns = 'NS-DWR', st = 'ST-DWR')
result1

data(datrdti)
result2 = dti(datrdti, environment = ENV, genotype = GEN, datrdti[,4:9],
            ns = 'NS-DWR', st = 'ST-DWR')
result2

## End(Not run)

gpbStat documentation built on Nov. 2, 2023, 5:52 p.m.