Multi-environmental assessment of an amaranth collection for the selection of high-yielding seed genotypes in Burkina Faso

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Résumé

Amaranthus sp. (amaranth) is a versatile plant whose grains have significant agri-food and nutritional potential, yet remain underutilized in Burkina Faso. Therefore, with a view to promoting the use of amaranth grains, an evaluation of grain productivity of 15 elite genotypes was conducted during the 2024 growing season. This evaluation was conducted in three locations (Loudan, Gampela, and Farako-Bâ) using a completely randomized Fisher's block design. The data collected covered 10 variables primarily related to growth, phenology, and yield. The collected data were subjected to a two-factor analysis of variance (genotypes and location) followed by Newman-Keuls comparison. The results revealed a highly significant difference (P < 0.01) among genotypes for all agronomic traits evaluated. A highly significant effect of location on the agronomic performance of the genotypes was observed. Furthermore, the genotype × location interaction was highly significant (P < 0.01) with the exception of stem diameter, for which the effect was not significant. In addition, the average grain yield per plant for the genotypes across the three sites indicated that A2004B, AC-NL1, MOG1, KOMB3, MIN, and DID3, which exhibit high productivity and high adaptability. These genotypes can be used in research programs for the development of grain amaranth varieties in Burkina Faso.

Mots-clés

Genotype × location interaction, Underutilized, Stability, Food security