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All Journal Jurnal Lahan Suboptimal Jurnal Natur Indonesia Agroteknika
Entis Sutisna Halimi
Jurusan Budidaya PertanianFakultas Pertanian Universitas Sriwijaya
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Engineering Mechanical Engineering

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Journal : jurnal lahan suboptimal

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Agronomic evaluation of sub1-introgressed black rice lines under rainfed lowland conditions in South Sumatra Adriansyah, Fikri; Halimi, Entis Sutisna; Septiani, Septiani
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 15 No. 1 (2026): JLSO
Publisher : Research Center for Suboptimal Lands (PUR-PLSO), Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jlso.15.1.2026.784

Abstract

Rice (Oryza sativa L.) is a major staple crop, and black rice is increasingly valued for its nutritional and economic importance. In South Sumatra, Indonesia, rainfed lowland swamp ecosystems offer substantial potential for rice cultivation, but productivity is constrained by alternating flooding and drought stress. The introgression of the Sub1 gene provides tolerance to submergence and supports the development of adaptive black rice cultivars. This study aimed to evaluate the agronomic performance of six black rice lines carrying the Sub1 gene under rainfed lowland conditions. The experiment was conducted using a randomized complete block design with three replications. Agronomic traits, including phenology, tillering, yield components, and grain yield, were recorded and analyzed using analysis of variance, correlation, and principal component analysis (PCA). Significant differences among genotypes were observed for most agronomic traits, indicating substantial genetic variability. Regita5 and Febry1 showed superior performance, producing the highest grain yields of 3.53 and 3.37 t/ha, respectively, supported by higher numbers of productive tillers and filled grains per panicle. Correlation and PCA results revealed that grain yield was primarily influenced by tillering capacity and grain production traits, whereas 100-grain weight and phenological traits contributed weakly or negatively. These findings demonstrate that black rice lines carrying the Sub1 gene, particularly Regita5 and Febry1, possess strong agronomic potential for cultivation and as breeding materials in stress-prone swamp ecosystems, contributing to sustainable rice production under climate variability.
Co-Authors Adriansyah, Fikri Anggraini, Putri Olivia Cahya, Muhardianto Fadilah, Lya Nailatul Fitri Ramadhani Irmawati Irmawati Muda, Strayker Ali Nur, Tri Putri Santa Maria Lumbantoruan, Santa Maria Septiani Septiani Zaidan, Zaidan