Abstract
Seeds of thirty chickpea genotypes were evaluated for their stress tolerance capacity and nutritional status. The genotypes exhibiting higher 1,1-Diphenyl-2-picrylhydrazyl radical scavenging activity (≥57.1 %), high proline (≥0.23 µmol/g) and total phenol (≥0.77 mg/g) contents were observed to exhibit reduced levels of hydrogen peroxide (≤160.3 µmol/g) and malondialdehyde (MDA) (≤15.1 nmol/g) contents. Principal component analysis showed that chickpea genotypes which exhibited higher levels of antioxidants, along with lower levels of hydrogen peroxide and MDA occupied a unique position on the graph. Agglomerative hierarchal clustering with Pearson’s correlation coefficient, using flexible linkage, grouped the genotypes in two major clusters viz., MC-1 and MC-2. The genotypes present in the sub-cluster ‘A’ of MC-1 exhibited merely one or two characters responsible for stress tolerance. In general, the genotypes present in ‘B’ sub-cluster of MC-1 and ‘C’ and ‘D’ sub clusters of MC-2 exhibited more number of parameters responsible for stress tolerance. Sub cluster ‘C’ was mainly constituted of genotypes exhibiting salinity tolerance while those present in ‘D’ showed tolerance to both salinity and water deficit conditions. Nutritional (starch, total sugars, proteins, iron, zinc and copper) and antinutritional (tannins, phytic acid and trypsin inhibitor activity) components of the seeds of all the genotypes were analyzed. The studies revealed that higher contents of iron (≥9.26 mg/100 g) and starch (≥437.3 mg/g) along with lower phytic acid (≤15.52 mg/g) could be the characteristics of genotypes exhibiting tolerance towards both salinity and water deficit stresses.
Published Version
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