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Title

USING SOME STRESS TOLERANCE INDICES IN CHICKPEA (CICER ARIETINUM L.) GENOTYPES IN DROUGHT CONDITIONS

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Abstract

 A FIELD EXPERIMENT WITH TWO HUMIDITY REGIMES (STRESSED AND NON-STRESSED) WAS PERFORMED IN A RANDOMIZED COMPLETE BLOCK DESIGN LAYOUT WITH THREE REPLICATES. ANALYSIS OF VARIANCE FOR BOTH POTENTIAL YIELD (YP) AND STRESS YIELD (YS) INDICATED SIGNIFICANT DIFFERENCES AMONG SEVEN CHICKPEA GENOTYPES. ALSO, SIGNIFICANT DIFFERENCES WERE OBSERVED AMONG CHICKPEA GENOTYPES REGARDING TWELVE DROUGHT TOLERANCE INDICES. BASED ON THE YP, GENOTYPES FLIP 03-64C, FLIP 98-106C, ARMAN AND AZAD HAD THE HIGHEST YIELD UNDER NON-STRESSED CONDITION, WHILE GENOTYPES FLIP 98-106C AND AZAD DISPLAYED THE HIGHEST YIELD UNDER STRESSED CONDITION. THEREFORE, GENOTYPES FLIP 98-106C AND AZAD ARE GOOD CANDIDATES FOR COMMERCIAL RECOMMENDATION TO FARMERS IN BOTH RAIN-FED AND IRRIGATED CONDITIONS. THE RELATIONSHIPS AMONG DROUGHT TOLERANCE INDICES ARE GRAPHICALLY DISPLAYED IN A PLOT OF TWO FIRST PRINCIPAL COMPONENTS ANALYSIS. THE FIRST AND SECOND COMPONENTS JUSTIFIED 95.46% OF THE VARIATIONS BETWEEN CRITERIA (59.36 AND 36.10% FOR PC1 AND PC2, RESPECTIVELY). THE STI, K1STI, MP, GMP, AND PI INDICES EXHIBITED STRONG CORRELATION WITH YP, WHILE YI SHOWED STRONG CORRELATION WITH YS, THEREFORE, YS CAN DISCRIMINATE DROUGHT TOLERANT GENOTYPES WITH HIGH GRAIN YIELD UNDER STRESS CONDITIONS.

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