Phenotypic plasticity of plant traits contributing to grain and biomass yield of dual-purpose sorghum

Ndiaye Malick, Muller Bertrand, Ganyo Komla Kyky, Guisse Aliou, Cissé Ndiaga, Adam Myriam. 2021. Phenotypic plasticity of plant traits contributing to grain and biomass yield of dual-purpose sorghum. Planta, 253:82, 14 p.

Quartile : Q1, Sujet : PLANT SCIENCES

Résumé : To 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.

Mots-clés Agrovoc : essai de variété, phytogénétique, amélioration des plantes, Sorghum, plasticité phénotypique, caractère agronomique, génotype, idéotype, production de biomasse, plante à grains

Mots-clés géographiques Agrovoc : Sénégal

Mots-clés libres : Sorghum, Sahel, Breeding, Ideotype, Performance, Adaptation

Classification Agris : F30 - Génétique et amélioration des plantes

Champ stratégique Cirad : CTS 2 (2019-) - Transitions agroécologiques

Auteurs et affiliations

• Ndiaye Malick, ISRA (SEN)
• Muller Bertrand, CIRAD-BIOS-UMR AGAP (MDG)
• Ganyo Komla Kyky, ITRA (TGO)
• Guisse Aliou, UCAD (SEN)
• Cissé Ndiaga, UCAD (SEN)
• Adam Myriam, CIRAD-BIOS-UMR AGAP (FRA) ORCID: 0000-0002-8873-6762 - auteur correspondant

Source : Cirad-Agritrop (https://agritrop.cirad.fr/597967/)

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