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Interpreting Genotype X Environment by Non-Parametric Methods for Malt Barley Evaluated under North Western Plains Zone
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The present study was carried out to identify malt barley genotypes with high yield and stability across eight different environments, using non-parametric statistical measures. Descriptive statistics MR, SD and CV identified DWRB147, DWRB150 and RD2943 stable genotypes. BH902 and PL890 were identified as unstable genotypes by CMR CSD and CCV. Non-parametric measures selected DWRB147 and DWRB150 as the stable genotypes and BH902 and PL890 unstable genotypes. Significant tests for Si 1 and Si 2 were based on sum of Zi 1 and Zi 2 measures and sum of Zi 1 was greater than critical value confirmed significant differences among the twenty genotypes. Results of the NPi 2, NPi 3 and NPi 4were similar for unstable performance of BH902, DWRB150 and DWRB147. Biplot analysis of PCA1 and PCA2 accounting for 70.08 per cent showed three distinguish groups among non-parametric measures. Clustering by Ward’s hierarchical method expressed four clusters by using the squared Euclidean distance as dissimilarity measure.
Keywords
Non-Parametric Measurements, Rank Correlation, Biplot Analysis, Hierarchical Clustering.
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