African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6914

Full Length Research Paper

Field evaluation of irrigated rice double haploid lines to identify high-yield accessions adapted to weed control

Yonnelle Dea Moukoumbi
  • Yonnelle Dea Moukoumbi
  • Institute of Agronomic and Forestry Research (IRAF), Libreville P. O. Box 16169, Gabon.
  • Google Scholar
Romaric Avou Tsoboua
  • Romaric Avou Tsoboua
  • Institute of Agronomic and Forestry Research (IRAF), Libreville P. O. Box 16169, Gabon.
  • Google Scholar
Mouritala Sikirou
  • Mouritala Sikirou
  • School of Horticulture and Green Landscaping, National University of Agriculture, Kétou P. O. Box 043, Benin.
  • Google Scholar
Julia Eudoxie Olong Obiang
  • Julia Eudoxie Olong Obiang
  • Institute of Agronomic and Forestry Research (IRAF), Libreville P. O. Box 16169, Gabon.
  • Google Scholar
Adote Herve Gildas Akueson
  • Adote Herve Gildas Akueson
  • Unit of Applied Statistics and Computer Science USIA/Laboratory of Forestry Studies and Research (LERF), Faculty of Agronomy, University of Parakou, Parakou, Benin.
  • Google Scholar
Roland Bocco
  • Roland Bocco
  • Texas AgriLife Research and Extension Center, Texas A&M Univ., System, 1509 Aggie Dr., Beaumont, TX, 77713, USA.
  • Google Scholar
Moussa Sie
  • Moussa Sie
  • Institute of Environment and Agricultural Research (INERA) – Farako-ba, National Center for Scientific and Technological Research (CNRST), Bobo-Dioulasso, Burkina Faso.
  • Google Scholar


  •  Received: 28 November 2024
  •  Accepted: 06 January 2025
  •  Published: 31 January 2025

Abstract

Weed herbicide resistance threatens the sustainability of the world’s rice. This study aims to select high-yielding and competitive rice genotypes against weeds. It was conducted at the PNSAV-PV research station in Kougouleu. The experimental design was a split plot, with the main factor being the weed regime and the secondary factor comprising fifteen genotypes during two consecutive rainfall seasons. Parameters were recorded for rice tolerance based on weed density and species. Some accessions avoided weed competition and exhibited early heading. Weed presence decreased the number of tillers at 60 DAS, plant height at maturity, days to maturity, and grain yield by 45.56, 14.60, 5, and 65.37%, respectively. The two most invasive species were Eleusine indica and Cyperus rotundus. These species had a density of 75 and 69 individuals per square meter, an abundance-dominance index (ADI) of 3, a coverage percentage of 42.90 and 39.33%, and a relative frequency (rF) of 100%, respectively. At 45 DAS, E. indica and C. rotundus remained the most prevalent, with (110, 95), (3, 3), (44.18%, 38.15%), and (91.67%, 95.83%) as sdensity per meter square, ADI, coverage, and rF, respectively. The most weed-tolerant accessions identified were CG20, HR32063F1-2-65-1, HR32061F1-2-41-1, HR32061F1-1-61-1, and HR32051F1-1-13-1.

Key words: density, improvement, screening, weed regime, weed species, accessions, rice