Insights into Phenotypic Stability of Okra [Abelmoschus esculentus (L.) Moench] Hybrids Evaluated under Multi Environments

Author: A.A. Patel, R.D. Vekariya, A.I. Patel and A.G. Singh

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Abstract

Stability analysis is an important tool for plant breeders where they study g × e interaction on yield and its attributes by growing a genotype at different locations/seasons for many years to identify stable and high-yielding genotypes under a wide range of environments. The present investigation comprising 35 genotypes was carried out to evaluate them in four different environments at Navsari Agricultural University. The experimental material consisted of 35 genotypes; representing 24 hybrids developed by line × tester mating of 10 diverse parents and commercial hybrid check ‘OH-102’. Analysis of variance for stability revealed that the genotypes and environments showed highly significant differences for all the characters when tested against both, pooled error and pooled deviation. The differences due to genotype × environment interaction were significant to highly significant when tested against pooled deviation for the characters like average fruit girth, average fruit weight, plant height at final harvest, branches/plant at final harvest, internodes/plant at final harvest, fruits/plant and fruit yield/plant. None of the parent or hybrid was found consistently stable for all the characters but the parent GAO-5 and the hybrids AOL-16-04 × Arka Anamika, AOL-16-04 × Arka Abhay, AOL-16-04 × Kashi Kranti, AOL-16-04 × Parbhani Kranti and NOL 17-06 × Arka Anamika exhibited average stability for fruit yield/plant. Whereas, hybrid NOL 17-05 × Arka Anamika and NOL 17-09 × Arka Anamika exhibited below-average stability. Such hybrids could be utilized as environment-specific hybrids. These hybrids could also be used as breeding stock for incorporation in crosses with the objective of improving economic traits.

Keywords

Okra, stability, fruit yield, environments

Conclusion

Thus, it can be summarized that for overall stable performance in fruit yield of the hybrid, one or more component characters might be responsible. So, by selecting stability in some yield components, the likelihood for the selection of stable hybrids increases. Grafius (1956) suggested that the stability of distinct yield components may be the cause of the stability of fruit yield. The average yield of each genotype rests on a particular set of environmental conditions. To find a stable genotype during selection, it would be beneficial to do real testing under a wide range of environments, including both favourable and unfavourable ones. The phenotypic stability of traits directly associated with fruit yield should get the appropriate amount of attention, particularly, fruit weight, plant height at final harvest, internodes/plant at final harvest and fruits/plant so as to achieve maximum stability for the end product i.e., fruit yield in okra. Such results were also reported by Patil et al. (2017); More et al. (2018); Vekariya et al. (2019). For all the examined characteristics, no genotype was stable. Since the genotype may not concurrently display uniform responsiveness and stability patterns for all of these characteristics, any generalization about the stability of genotypes for all of the traits is therefore too difficult. Nevertheless, given that certain lines greatly outperformed the commercial check "OH-102", when averaged across environments, revealed the likelihood of producing particular lines for particular situations. However, for more reliable recommendations, these lines need to be tested in a manifold location.

References

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How to cite this article

A.A. Patel, R.D. Vekariya, A.I. Patel and A.G. Singh (2023). Insights into Phenotypic Stability of Okra [Abelmoschus esculentus (L.) Moench] Hybrids Evaluated under Multi Environments. Biological Forum – An International Journal, 15(2): 1185-1194.