Dissection of Genotype x environment interaction and multi-trait selection for identification of stable hybrids in okra [Abelmoschus esculentus (L.) Moench]

Abstract

Okra also known by lady's finger or gumbo is the most significant versatile vegetable in the world’s tropical and subtropical climates, well-renowned for its soft and flavorful pods. The complexity in yield improvement of any crop is escalated due to genotype x environment (G × E) interactions. Likewise success in okra improvement is limited by G × E interaction and needs to be determined for use in future decision-making process. Multivariate selection strategies like AMMI and GGE biplots were utilized in this study that graphically depict interrelationships between the tested environments and genotypes with simple visual evaluations of okra hybrids possessing high and stable yield. Whereas MTSI was used to identify okra hybrids with dynamic traits that executes better across varied environmental conditions. A set of 13 traits were accessed in okra 24 hybrids along with 10 parents evaluated under multi-environment trials. Among the selected genotypes, H23 and H10 were promising as they produced elevated and adaptable fruit yield altogether with traits that are favoured much by the farmers. MTSI also confirmed high and desired selection gains in all traits among selected genotypes. Further, agronomic trials to determine best crop management practices of identified superior genotypes can be done to introduce them as improved cultivars for diverse environments.

Impact of weed management practices on weeds and okra crop

“…Hand-weeding at 20 and 40 DAS (14.1%) and application of pendimethalin 1.0 kg/ha (PE) fb quizalofop-ethyl 0.04 kg/ha at 30 DAS (16.1%) was also found more effective in controlling the weeds in the okra crop as next 2 superior treatments after weed-free cheek. These findings are in line with those of Patel et al (2004), Shivalingappa et al (2014), andDhivya et al (2021).…”