Phenotypic plasticity of plant traits contributing to grain and biomass yield of dual-purpose sorghum
2021
Ndiaye, Malick | Muller, Bertrand | Ganyo, Komla Kyky | Guissé, Aliou | Cissé, Ndiaga | Adam, Myriam | Centre d'Etude Regional Pour l'Amelioration de l'Adaptation A la Secheresse (CERAAS) | Amélioration génétique et adaptation des plantes méditerranéennes et tropicales (UMR AGAP) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro - Montpellier SupAgro ; Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro) | Département Systèmes Biologiques (Cirad-BIOS) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad) | Institut Togolais de Recherche Agronomique (ITRA) | Unité Mixte Internationale "Environnement Santé Sociétés" (ESS) ; Université Gaston Berger de Saint-Louis Sénégal (UGB)-Centre national de la recherche scientifique et technologique [Ouagadougou] (CNRST)-Université des Sciences, des Techniques et des Technologies de Bamako (USTTB)-Centre National de la Recherche Scientifique (CNRS)-Université Cheikh Anta Diop de Dakar [Sénégal] (UCAD) | West Africa Agricultural Productivity Program for Senegal (WAAPP-Senegal)
International audience
Mostrar más [+] Menos [-]Inglés. Main conclusionPlant traits of interest for sorghum breeders to develop dual-purpose varieties are stem diameter, flag leaf size, crop cycle, and number of grains per panicle.AbstractTo develop dual-purpose varieties, breeders need to improve traits linked both to grain and biomass production. To identify these traits, we studied the phenotypic plasticity of eighteen traits and the performance of ten contrasting sorghum genotypes, used in West Africa. Trials were carried out in a randomized complete blocks design with four replicates from 2013 to 2016 in Bambey, Sinthiou Malem and Nioro du Rip in Senegal. The results revealed three plant types. The first type, "biomass production", contained genotypes IS15401 and SK5912, and was linked to cycle duration, leaf area, and plant height. The second type, "grain production", grouped the caudatum race sorghum 621B, F2-20 and Soumba, and was associated with the number of grains per panicle and the width of the flag leaf. The third group, "dual-purpose", corresponding to the genotypes Fadda, Nieleni and Pablo, combined some favourable traits for grain and biomass: stem diameter, internode length, number of green leaves and number of grains per panicle. The study showed that high and stable grain yields were associated with stability in flag leaf size, phenology and number of grains per panicle, and a high and stable biomass yield was associated with stability in stem diameter. Those stable plant traits might be of interest for sorghum breeders selecting to develop dual-purpose varieties.
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