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Plant Science Today (PST)

Research Articles

Vol. 11 No. 4 (2024)

Genetic analysis of resistance to YVMV in okra [Abelmoschus esculentus (L.) Moench]

DOI
https://doi.org/10.14719/pst.6395
Submitted
28 November 2024
Published
10-05-2025 — Updated on 24-05-2025
Versions

Abstract

Yellow vein mosaic virus (YVMV) is a highly devastating viral disease in okra growing areas. Understanding the inheritance of YVMV disease resistance and the breeding approach for developing a resistant cultivar against this disease is critical. Six generations (P1, P2, F1, F2, BC1, BC2) of four selected crosses (R × R, R × S and S × S) between two resistant and two susceptible genotypes were used to study the genetic control of host resistance to YVMV disease in okra. The inheritance study found that resistance to YVMV illness was influenced by two duplicate dominant genes in the Resistant × Resistant cross and one dominant gene in the Resistant × Susceptible cross. Significant scaling tests and joint scaling tests revealed the presence of epistasis for illness reaction features. The size of dominance affects and dominance × dominance kind of epistasis suggests that heterosis breeding and recombination breeding followed by selection of transgressive segregants are the most suitable breeding technique to establish host resistance against YVMV disease.

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