Simulated trial of ten pearl millet genotypes in six environments (three locations x two years) with three replications, for stability and GGE biplot analysis.
Format
A data frame with 180 rows and 5 variables:
- environment
Factor, location-year (BKN = Bikaner, JDH = Jodhpur, JSM = Jaisalmer).
- rep
Factor, replication within environment.
- genotype
Factor, genotype code (PM-01 to PM-10).
- grain_yield
Grain yield (kg/ha).
- days_to_maturity
Days to maturity.
Examples
data(pearlmillet_met)
stability_analysis(pearlmillet_met, "genotype", "environment", "rep",
"grain_yield", method = "eberhart")
#>
#> ======================================================================
#> STABILITY ANALYSIS
#> ======================================================================
#> Trait : grain_yield
#> Genotypes : 10
#> Environments : 6
#> Replications : 3
#> Grand mean : 1850.89
#>
#> Combined analysis of variance
#> Source Df Sum Sq Mean Sq F value Pr(>F)
#> Environment 5 21126520.38 4225304.08 198.051 0.0000 ***
#> Rep(Environment) 12 256012.80 21334.40 2.042 0.0271 *
#> Genotype 9 1529257.11 169917.46 16.265 0.0000 ***
#> Genotype x Environment 45 1479461.62 32876.92 3.147 0.0000 ***
#> Pooled error 108 1128267.87 10446.92
#> Total 179 25519519.78
#> Signif. codes: *** p < 0.001, ** p < 0.01, * p < 0.05, NS not significant
#>
#> Eberhart and Russell (1966)
#> Genotype Mean bi SE_bi p_bi S2di p_S2di R2
#> PM-04 2016 1.1880 0.14110 0.25330 10530.0 0.004411 0.9466
#> PM-07 1972 1.2740 0.06970 0.01717 -60.9 0.420300 0.9882
#> PM-01 1923 1.0490 0.05697 0.44160 -1196.0 0.623600 0.9883
#> PM-02 1856 1.0370 0.12790 0.78790 8030.0 0.013470 0.9427
#> PM-06 1841 0.8868 0.06148 0.13950 -820.5 0.550700 0.9811
#> PM-09 1830 1.1690 0.06507 0.06032 -500.7 0.492800 0.9878
#> PM-10 1827 1.1220 0.10760 0.31840 4666.0 0.059670 0.9646
#> PM-03 1792 0.6853 0.09957 0.03415 3499.0 0.098940 0.9221
#> PM-08 1757 0.8286 0.09566 0.14770 2962.0 0.124400 0.9494
#> PM-05 1694 0.7608 0.05551 0.01255 -1313.0 0.647100 0.9792
#> bi = 1 and non-significant S2di indicate average, stable response.
#>
#> Full tables: $eberhart, $eberhart_anova, $finlay, $shukla, $wricke, $ammi, $cv_stability, $superiority