Evaluation of finger millet genotypes for stability using parametric and non-parametric methods in India
Abstract
A study of phenotypic stability of 30 finger millet genotypes was conducted to assess genotype-environment interaction (GEI) and identify stable finger millet (Eleusine coracana (L.) Gaertn. subsp. coracana) genotypes for grain yield across four diverse locations in India. Genotypes, environments main effects and GEI were significant at P < 0.01. Different stability measures identified different wide adaptable genotypes. The parameters Wi2, σi2, Si(1) and Si(2) identified TNEC 1234, GPU 67, KMR 344, DHFMV 10-2-1, GPU 92 and VL 352 as stable genotypes, similarly ASV identified PPR 1044, PPR 1040, BR 45, GPU 91, VL 384 and DHFMV 78-3-1 while GPU 67, VL 376, DHFMV 10-2-1, GPU 92, VR 990 and GPU 91 were top six stable genotypes according to Ysi. The rank correlation matrix identified only two important stability measures (Ysi and YSI) in the identification of stable genotypes without compromise for grain yield. Among these two, Ysi was found to be the better choice for screening of genotypes for both yield and stability.
Keywords
G×E, Parametric stability, Non parametric stability, Rank Correlation, Finger millet
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