Differential Response of Chickpea (Cicer arietinum L.) Genotypes under Organic and Inorganic Input Conditions

Author: Jeevanjot Kaur, Neelam Bhardwaj and Sunidhi Tiwari

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Abstract

The present investigation entitled “Genetic analysis for seed yield and related traits in chickpea (Cicer arietinum L.) under organic and chemical input conditions” was undertaken during rabi 2018 to assess the nature and magnitude of genetic variability and associations among various traits. Analysis of variance revealed significant genetic differences among chickpea genotypes for all the traits under organic and chemical input conditions except pod width and pod length under organic input conditions and nitrogen fixation under both the conditions. In general, mean and range for most of the traits were found to be higher under organic input conditions as compared to chemical input conditions. High PCV, GCV, heritability and genetic advance were observed for nodule number, nodule fresh weight, nodule dry weight and seed yield per plant under both the conditions. Under organic input conditions seed yield per plant was significantly positively correlated with secondary branches, pods per plant, nodule number, nodule fresh weight, nodule dry weight, harvest index and biological yield per plant whereas under chemical input conditions seed yield per plant was significantly positively correlated with primary branches per plant, secondary branches per plant, pods per plant, 100-seed weight, harvest index and biological yield per plant implying that these traits can act as selection indices for seed yield. On the basis of mean performance, best genotypes for seed yield common under both the conditions are 18-II, 113-P, P-30-6 and DKG-964.

Keywords

Organic input conditions, chemical input conditions, differential response, selection index

Conclusion

For breeding of varieties suitable for organic agriculture traits like secondary branches, pods/plant, nodule number, nodule fresh weight, nodule dry weight, harvest index and biological yield/plant are an important selection criteria whereas for inorganic input conditions primary branches/plant, secondary branches/plant, pods/plant, 100-seed weight, harvest index and biological yield/plant should be used as selection criteria. Keeping in view, the varied performance of genotypes under both the systems and the correlation pattern it can be concluded that organic agriculture needs a separate breeding program for the development of organic input responsive varieties. Similar genotypes are used for both conditions but in organic input conditions they behave better than the inorganic input conditions and their expression was different in both the conditions due to the difference in expression of genes. These results indicate the yield evaluations must be done separately in both systems to identify environment-specific as well as relatively few broadly adapted genotypes because the broadly adapted genotypes are the exception rather than the rule. There is evidence that change in conditions can influence genetic interactions among traits as well as genetic variance in traits themselves.

References

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How to cite this article

Jeevanjot Kaur, Neelam Bhardwaj and Sunidhi Tiwari (2023). Differential Response of Chickpea (Cicer arietinum L.) Genotypes under Organic and Inorganic Input Conditions. Biological Forum – An International Journal, 15(10): 436-446.