Non-parametric measures of phenotypic stability in chickpea genotypes (<Emphasis Type="Italic">Cicer arietinum</Emphasis> L.) |
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Authors: | Asghar Ebadi Segherloo Sayyed Hossain Sabaghpour Hamid Dehghani Morteza Kamrani |
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Institution: | (1) Department of Plant Breeding, Faculty of Agriculture, Tarbiat Modares University, 14115-336, Tehran, Iran;(2) Dry land Agricultural Research Institute, Kermanshah, Iran;(3) Department of Agronomy and Plant Breeding, Faculty of Agriculture, University of Tabriz, Tabriz, Iran |
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Abstract: | Multi-environment trials (MET) play an important role in selecting the best cultivars and/or agronomic practices to be used
in future years at different locations by assessing a cultivar's stability across environments before its commercial release.
Objective of this study is to identify chickpea (Cicer arietinum L.) genotypes that have high yield and stable performance across different locations. The genotypes were developed by various
breeders at different research institutes/stations of Iran and the International Center for Agricultural Research in Dray
Areas (ICARDA), Syria. Several statistical methods were used to evaluate phenotypic stability of these test chickpea genotypes.
The 17 genotypes were tested at six different research stations for two years in Iran. Three non-parametric statistical test
of significance for genotype × environment (GE) interaction and ten nonparametric measures of stability analyses were used
to identify stable genotypes across the 16 environments. The non-parametric measures (Kubinger, Hildebrand and Kroon/Van der)
for G × E interaction were highly significant (P < 0.01), suggesting differential responses of the genotypes to the test environments. Based on high values of nonparametric
superiority measure (Fox et al. 1990) and low values of Kang's (1988) rank-sum stability parameters, Flip 94-123C was identified as the most stable genotype. These non parametric parameters
were observed to be associated with high mean yield. However, the other nonparametric methods were not positively correlated
with mean yield and were therefore not used in classifying the genotypes. Simple correlation coefficients using Spearman’s
rank correlation, calculated using ranks was used to measure the relationship between the stability parameters. To understand
the nature of relationships among the nonparametric methods, a hierarchical cluster analysis based on non weighted values
of genotypes, was performed. The 10 stability parameters fell into three groups. |
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Keywords: | Cicer arietinum L Genotype × environment interaction Nonparametric stability measure |
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