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Original Research
Phenotypic plasticity of okra for yield and associated traits
Submitted: 10 March 2023 | Published: 08 April 2024
About the author(s)
Abe S. Gerrano, Department of Plant Breeding and Plant Genetic Resources, Faculty of Vegetable, Industrial and Medicinal Plants, Agricultural Research Council, Pretoria, South Africa Department Food Security and Safety, Focus Area, Faculty of Natural and Agricultural Sciences, North-West University, Mafikeng, South Africa; and Department of Plant Sciences and Plant Pathology, College of Agriculture, Montana State University, Montana, United StatesBogaleng M. Matjeke, Department of Plant Breeding and Plant Genetic Resources, Faculty of Vegetable, Industrial and Medicinal Plants, Agricultural Research Council, Pretoria, South Africa
Lindiwe Khoza, Department of Plant Breeding and Plant Genetic Recourses, Faculty of Vegetable, Industrial and Medicinal Plants, Agricultural Research Council, Pretoria, South Africa
Abueng Moalafi, Department of Plant Breeding and Plant Genetic Recourses, Faculty of Vegetable, Industrial and Medicinal Plants, Agricultural Research Council, Pretoria, South Africa
Micheal Bairu, Department of Plant Breeding and Plant Genetic Recourses, Faculty of Vegetable, Industrial and Medicinal Plants, Agricultural Research Council, Pretoria, South Africa
Lehlogonolo A. Matelele, National Plant Genetic Resources, Department of Agriculture, Land Reform and Rural Development, Pretoria, South Africa
Precious Sema, National Plant Genetic Resources, Department of Agriculture, Land Reform and Rural Development, Pretoria, South Africa
Mariette Truter, Department of Crop Protection, Faculty of Vegetable, Industrial and Medicinal Plant, Agricultural Research Council, Pretoria, South Africa
Sonja Venter, Department of Vegetable, Industrial and Medicinal Plant, Agricultural Research Council, Pretoria, South Africa
Abstract
Background: The genetic improvement of okra for the agro-ecological conditions requires adequate genetic background for understanding the inheritance of the traits and genetic control.
Aim: To evaluate collection of okra accessions for their phenotypic plasticity and their relationships among tested accession.
Setting: Field trail laid in a randomised complete block design of three replication.
Methods: A total of 24 okra accessions were planted at Loskop Research Station in Limpopo province, South Africa, during the 2020 and 2021 cropping seasons.
Results: The analysis of variance showed significant differences among the accessions for yield and related traits measured. The principal components analysis revealed 68.85% total variation. The genotypic coefficient of variance (GCV) was higher than phenotypic coefficient of variance (PCV) for all the measured parameters. The study revealed medium heritability for yield (33%), high (≥ 60%), for hundred-seed weight and number of fruits per plant. A positive significant correlation between grain yield and fruit yield per plant (r = 0.39) was observed.
Conclusion: The study recommended accessions Acc No. 1859.2.3.1, Acc No. 1181.2.1.1 and Acc No. 1900.2.3.1 to be used as breeding lines in future okra breeding programme.
Contribution: The accessions identified as potential parents for okra improvement programme, based on complementary agronomic traits could be used for direct cultivation by small-scale farmers and parental lines for breeding population.
Keywords
Sustainable Development Goal
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