Diversity Analysis in Okra [Abelmoschus esculentus (L.) Moench] Genotypes under Saline Situation

Author: Rituparna Munshi, Pinaki Acharyya, Arup Chattopadhyay, Pritam Mishra, Biswanath Sahoo and Lopamudra Chakraborty

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Abstract

Salinity is one of the major abiotic stresses that limits okra production as its deleterious effect persist throughout the plant life cycle. Okra is an important, high-value vegetable and it contains high nutritional value but yield of okra is low due to soil salinity. Extensive evaluation is essential to develop salt tolerant lines which can withstand the salinity stress. This study was conducted to assess the varietal performance and correlation and morphological diversity of pod yield and other related characters among twenty five okra genotypes under salinity stress. GCV and PCV values were high for fresh fruit yield per plant followed by number of fruits per plant and number of seeds per fruit. High heritability coupled with high genetic advance as percentage of mean was observed in fresh fruit yield per plant, number of fruits per plant, germination percentage and number of seeds per fruit. Germination percentage, plant height, number of leaves per plant, leaf length, fruit length, fruit diameter, fruit weight, number of fruits per plant, number of seeds per fruit and thousand seed weight exhibited significant positive correlation co-efficient with fresh fruit yield per plant. Considerable diversity within and between clusters were noted and Cluster III followed by Cluster V was deemed best for selecting diverse accessions. Cluster analysis and it’s inter and intra distances will help in narrowing down the selection of the genotypes suitable for breeding strategies with an eye on salinity tolerance The genotypes under these clusters hold great promise as parents in future hybridization program to obtain accessions tolerant to salinity.

Keywords

Correlation, genetic advance, heritability, okra, path analysis, salinity

Conclusion

Good amount of variation for the set of characters under study among the utilized okra germplasm was observed which depicts that gene pool of okra towards salinity tolerance is available. On the basis of heritability coupled with genetic advance ample scope remains for selection of the promising types based on traits having high to moderate heritability as well having good presence of genetic advance. Correlation and path coefficient analysis will help us in simplified screening through weightage on traits which are having positive and significant correlation with yield. Cluster analysis and it’s inter and intra distances will help in narrowing down the selection of the genotypes suitable for breeding strategies with an eye on salinity tolerance. In our ensuing experiment, genotypes falling under cluster III (Shivani Hybrid and Japani Jhar) and cluster V (Mayna and Suhani) could be exploited in the near future keeping in mind their sustainability of morphological and yield related traits under saline conditions.

References

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How to cite this article

Rituparna Munshi, Pinaki Acharyya, Arup Chattopadhyay, Pritam Mishra, Biswanath Sahoo and Lopamudra Chakraborty (2023). Diversity Analysis in Okra [Abelmoschus esculentus (L.) Moench] Genotypes under Saline Situation. Biological Forum – An International Journal, 15(6): 385-394.